highaltitude.log.20121113

[00:00] <meatmanek> ideally I'd want to piggyback on the APRS-IS though
[00:00] <fsphil> yes, the ability to have mutliple receivers is a great one
[00:00] <fsphil> there have been a few flights where I missed some data but others got it
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[00:01] <fsphil> at 300 baud it is somewhat slow
[00:02] <meatmanek> yeah how long does it take to transmit those images?
[00:02] <fsphil> but we only really use that because of the limited power levels
[00:02] <fsphil> for 320x240 it's about 4 minutes
[00:02] <fsphil> some of that is rtty overhead
[00:02] <fsphil> the actual time is variable depending on the complexity of the images
[00:03] <meatmanek> yeah
[00:03] <fsphil> one guy did use 1200 baud
[00:03] <fsphil> which mostly worked, but it's very tricky to tune with regular amateur radio gear
[00:04] <fsphil> at that sort of speed it's a better match to sstv
[00:05] <meatmanek> you mean SSTV would be easier at that point?
[00:05] <fsphil> nah, just that sstv has a speed advantage for transmitting slower than 1200 baud
[00:05] <meatmanek> ah
[00:05] <fsphil> but the digital mode will look better
[00:06] <fsphil> and you can't combine data easily from multiple stations with sstv
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[00:31] <meatmanek> fsphil yeah packets are nice like that
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[03:58] <heathkid> $40 for a balloon and almost $100 for a parashoot? really???
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[04:05] <heathkid> I'm seriously thinking for a first launch a couple 3 ft. mylars and no parashoot....
[04:06] <heathkid> if I recover... great! but I'm not counting on it...
[04:06] <heathkid> right attitude or wrong thinking completely?
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[04:12] <KF7FER> heathkid: in my limited experience I wouldn't launch without a parachute BUT if you're using more than one balloon (say two), you could try and have each balloon have 1/2 the lift. Likely only one would burst and the other could help you glide back down in a fairly controlled manner. Just a thought :-)
[04:13] <KF7FER> in my only launch we ended up drifting for a long period of time (and that helped get the payload over the Cascade mountains)
[04:13] <heathkid> that's what I was thinking... but seriously? $100 for a 35" parashoot?
[04:13] <heathkid> 36"
[04:14] <KF7FER> ouch. I guess you gotta pay for somebody else's golden parachute?
[04:14] <KF7FER> so to speak
[04:14] <heathkid> know of a cheaper source?
[04:14] <heathkid> I was looking at a 600g Kaymont + parachute
[04:15] <heathkid> now I'm thinking a couple 3 ft. mylars....
[04:15] <KF7FER> hmmm... sorry. I did the tracker, Brett did the payload. I _think_ he actually made the chute (as well as the enclosure cover)
[04:15] <heathkid> I'm so confused!
[04:15] <Darkside> http://randomaerospace.com/Random_Aerospace/Parachutes.html
[04:16] <Darkside> the spherachutes are great
[04:16] <KF7FER> so how do you size the chute to your payload? I don't see any weights?
[04:16] <KF7FER> or is that in the chart on the left?
[04:16] <KF7FER> chute weight being the payload weight?
[04:17] <meatmanek> that's probably the chute itself
[04:17] <Darkside> thats the chute itself
[04:17] <Darkside> theres a graph somewhere on the ukhas wiki
[04:17] <Darkside> http://ukhas.org.uk/guides:parachute_sizing_chart
[04:18] <KF7FER> thanks - beat me to the results of googling "ukhas wiki chute payload"
[04:18] <KF7FER> 'cept the numbers are in dem dere metric things ;-)
[04:19] <meatmanek> wolframalpha.com
[04:19] <KF7FER> guess it's a sign of a more civilized world
[04:19] <Darkside> yep
[04:19] <Darkside> metric ftw
[04:19] <KF7FER> certainly makes the math easier
[04:20] <KF7FER> now let's all do a metric clock - maybe a calendar?
[04:20] <KF7FER> still chutes do appear to be spendy to buy
[04:21] <Darkside> the idea is you reuse them
[04:22] <KF7FER> of course but the initial outlay is kinda expensive
[04:23] <fsphil> australia is properly metric. not like the UK's half metric half imperial system
[04:24] <heathkid> and here in the US I'm stuck using both
[04:24] <heathkid> not half and half... both
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[04:25] <heathkid> learned Metric back in gradeschool... what happened? the US should be metric by now!
[04:26] <fsphil> yea here too
[04:26] <fsphil> they don't teach imperial in schools here anymore, haven't done in years
[04:26] <KF7FER> no doubt! heathkid you must be an old fogey like me... I know my kids didn't learn metric
[04:27] <KF7FER> https://dl.dropbox.com/u/8240668/images/IMG_3539.JPG
[04:27] <KF7FER> Sorry it's the favorite pic I've got so far
[04:28] <fsphil> looks like it's wearing a dress
[04:29] <KF7FER> trying to give the payload some sort of complex?
[04:29] <fsphil> no wait, it's a towel. it's very important to take a towel when travelling into near space
[04:29] <KF7FER> cold AND wet
[04:30] <heathkid> KF7FER: I'm four years newer than you are...
[04:30] <fsphil> hehe, newer
[04:30] <heathkid> still make me old?
[04:30] <KF7FER> according to me 3 kids I'm sorry, you hit at 10 of 10 on the geezer scale
[04:30] <KF7FER> me=my
[04:30] <heathkid> oh well
[04:31] <KF7FER> but good for you
[04:31] <heathkid> cool to be us though
[04:31] <KF7FER> I think so. My kids don't seem to get it but I think maybe I didn't get it when I was 18 either
[04:31] <heathkid> these kids know nothing these days!
[04:32] <heathkid> my kids need a wake up call
[04:32] <KF7FER> I'm shocked that my 21yo daughter is going to graduate school this fall....
[04:32] <heathkid> can't smak 'em upside the head now
[04:32] <KF7FER> heh.... made me laugh
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[04:32] <heathkid> my oldest son is 19
[04:33] <heathkid> taking some time off from college to figure out what he wants to do... first year didn't go so well...
[04:33] <KF7FER> well if any kid needs to be smacked upside the head it's a teenage boy
[04:33] <heathkid> NO KIDDING!
[04:33] <heathkid> ...all teenage boys here... *smack yourselves upside the head!*
[04:33] <KF7FER> my son is 18 and I'm almost hoping he joins the marines or something... he certainly is... lost
[04:34] <KF7FER> not that the military is the be all end all but... well, it's helped the lost in my family
[04:34] <heathkid> oldest is lost... middle will likely go into the military... youngest is my daughter (who needs locked up until she's 30)
[04:35] <KF7FER> well more than one gives you hope
[04:35] <heathkid> true
[04:36] <KF7FER> I just wish I'd had one more than could play in the NBA... then dad could retire ;-)
[04:36] <heathkid> :)
[04:36] <KF7FER> I just hope to live long enough to be a burden
[04:36] <heathkid> my oldest is 19 years old... 6'4 and 260 lbs....
[04:36] <heathkid> never played football in his life
[04:37] <heathkid> straight A
[04:37] <KF7FER> WOW! That's a big effin dude
[04:37] <heathkid> A's in math and wanted to be an engineer
[04:37] <KF7FER> go dude!
[04:37] <KF7FER> that's cool... if you like geeks and all
[04:37] <heathkid> until he took a year of Purdue EE classes
[04:38] <heathkid> he's not as much a geek as I am
[04:38] <heathkid> maybe
[04:38] <heathkid> still not sure
[04:38] <heathkid> he's up there...
[04:38] <heathkid> designs his own games
[04:38] <KF7FER> I use the word geek - like hacker - in a good way. I notice my kids idea of a geek is not quite the same
[04:38] <heathkid> same here
[04:38] <heathkid> I'm *proud* to be a geek
[04:39] <KF7FER> no doubt. me too
[04:39] <heathkid> wear a SFE Geek labcoat every day at work... :)
[04:39] <KF7FER> my kids call me a geek but in a good way
[04:39] <heathkid> cheap and disposable
[04:39] <heathkid> and very high quality
[04:40] <heathkid> I use them for a few months and then toss them in the bin...
[04:40] <heathkid> can't afford the biohazzard cleaning service for a lab coat
[04:40] <heathkid> cheaper just to keep replacing them
[04:41] <heathkid> and SFE is *cheap*
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[04:42] <heathkid> half the price for half the quality anywhere else... but don't tell them that! :)
[04:42] <heathkid> meaning half the price for twice the quality
[04:42] <KF7FER> I love SFE. I've gotten plenty of good ideas from them and I always support them.. At least for the first unit. Then I find their source and buy from there
[04:43] <KF7FER> I have found their shipping is much slower these days... it takes me a week or so to get anything
[04:43] <heathkid> I support them when I can and have spent a LOT of $$$ with them... but they really need to look at adafruit and keep up.
[04:43] <heathkid> yep
[04:44] <fsphil> I like SFE's style
[04:44] <heathkid> I do too
[04:44] <heathkid> it's my style
[04:44] <KF7FER> adafruit is another place I've been - I bought my first FDTI cable from them
[04:44] <fsphil> even if not everything is ideal or well priced
[04:44] <KF7FER> nice that SFE posts schematics of everything
[04:44] <heathkid> I'll always pay a few extra $ from a company like SFE
[04:44] <KF7FER> that's why I but
[04:44] <KF7FER> but=buy
[04:44] <KF7FER> oops
[04:45] <heathkid> plus "Free Day" doesn't hurt either! :P
[04:46] <KF7FER> great PR even though I've yet to get anything free
[04:46] <heathkid> I just wish they'd carry the latest stuff....
[04:46] <heathkid> I've gotten it the last two years
[04:46] <heathkid> free stuff
[04:46] <KF7FER> it's ok, I still like you ;-)
[04:46] <heathkid> :)
[04:47] <heathkid> which keeps me spending more of my $ there
[04:47] <KF7FER> so just to show I drove there (during recovery), as well as flew over the top of Mt. Hood... https://dl.dropbox.com/u/8240668/images/IMG_3465.JPG
[04:47] <KF7FER> no doubt
[04:47] <heathkid> brb
[04:48] <KF7FER> well kinda over the top and all... given a certain margin of error...
[04:48] <fsphil> "free day doesn't hurt either" ... the last one caused physical pain :)
[04:48] <heathkid> you don't know my dog Jake... when he wants out... he *really* needs to go out *NOW*! :)
[04:48] <heathkid> brb
[04:49] <KF7FER> fsphil: I really know how you feel, but since the pain of the very first free-day I think I'm immune
[04:51] <fsphil> I got some stuff on that free day
[04:51] <fsphil> no, it was the second one I got stuff
[04:51] <fsphil> the first one the website just didn't exist
[04:51] <fsphil> warning signs you don't see in n.ireland: http://flic.kr/p/dsWGaU
[04:53] <KF7FER> nor in the wilds of Oregon... nary a 'croc to be found
[04:56] <fsphil> any animals there with pointy teeth?
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[04:56] <KF7FER> well I have seen some fairly large raccoons but they haven't let me check out their teeth
[04:57] <KF7FER> I doubt it's the same tho
[04:57] <KF7FER> more like things I'd eat than would eat me. At least here in capitol.
[04:58] <fsphil> back home, the largest wild animal that can bite is a fox
[04:58] <fsphil> maybe a badger -- not sure which is bigger
[04:59] <fsphil> google says badger
[05:00] <KF7FER> go badger milk I guess (bad movie reference)
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[05:13] <heathkid> KF7FER: https://dl.dropbox.com/u/8240668/images/IMG_3465.JPG is an *INCREDIBLE* pic!
[05:15] <fsphil> fake
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[05:16] <fsphil> that looks like a scary place to land!
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[05:18] <heathkid> thanks to Dave... this is still my FAVORTE pic *ever*! http://www.daveakerman.com/wp-content/uploads/2012/04/Buzz-Moon-2-1024x576.jpg
[05:18] <heathkid> someday I hope to be in his league...
[05:19] <heathkid> 2nd favorite.... http://www.daveakerman.com/wp-content/uploads/2012/04/Buzz-In-Space-2-1024x576.jpg
[05:19] <heathkid> right now I'm just sorta lost...
[05:20] <heathkid> have payload... need balloon....
[05:20] <fsphil> I've balloons and a payload, need weather :)
[05:20] <fsphil> oh, and to bribe DM
[05:20] <heathkid> DM?
[05:20] <Darkside> heathkid: no love for http://vimeo.com/19064597?
[05:21] <fsphil> guy at the CAA who gives permission to launch
[05:21] <KF7FER> thanks for the good words... I was amazed we floated over the Mt. Hood National Forest and still recovered the payload. But who doesn't love Buzz?
[05:21] <fsphil> he's been ignoring me lately
[05:22] <heathkid> KF7FER: were you part of the Buzz launch?
[05:22] <KF7FER> I wish sorry.. I just liked the pic
[05:22] <heathkid> :)
[05:22] <heathkid> me too
[05:22] <heathkid> my payload will be much much lighter...
[05:23] <Darkside> we managed to auction off a pic of one of our launches for about $23k :P
[05:23] <Darkside> http://i.imgur.com/bHo5g.jpg
[05:23] <Darkside> of course, it was signed by some influential people
[05:23] <heathkid> and for first launch... disposable (although I hope to recover since I plan on having a keychain HD video camera running 720P onboard)...
[05:23] <Darkside> watch out, some of those keychain cameras work very nicely as gps jammers
[05:24] <heathkid> my payload will be fully tested prior to launch in high-altitude chamber...
[05:24] <KF7FER> anybody fly this: https://www.sparkfun.com/products/11418 ?
[05:24] <Darkside> KF7FER: gopto is better
[05:24] <Darkside> gopro
[05:24] <KF7FER> isn't it the same thing?
[05:24] <Darkside> no
[05:24] <Darkside> gopro has better lens i think
[05:25] <Darkside> and is a hell of a lot easier to use
[05:25] <KF7FER> ok, interesting. I thought this was the guts of a gopro and was the same thing.
[05:25] <heathkid> back in stock now?
[05:25] <heathkid> hmm....
[05:26] <Darkside> given that a gopro hd hero is about the same price
[05:26] <Darkside> i'd just get a gopro instead
[05:26] <KF7FER> seems reasonable. I don't have the money for either I'm just drooling
[05:27] <heathkid> why aren't the headers on the bottom side?
[05:27] <heathkid> this configuration makes it difficult...
[05:27] <heathkid> link to a cheap gopro?
[05:27] <fsphil> there are no cheap gopros
[05:27] <fsphil> that work :)
[05:28] <heathkid> this is my primary payload for my first launch... http://www.ebay.com/itm/261114591451
[05:28] <heathkid> it's *awesome*!
[05:28] <heathkid> if you don't have one... get one!
[05:29] <fsphil> that's quite expensive
[05:29] <heathkid> for GPS and APRS TX?
[05:29] <heathkid> in that small of a package?
[05:30] <heathkid> just add 4 AA lithium's and a balloon and away you go
[05:30] <fsphil> well if you did a custom board it would probably be closer that price
[05:30] <heathkid> I'm not doing a custom board...
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[05:31] <fsphil> you should :)
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[05:31] <heathkid> why?
[05:31] <KF7FER> I'd add that in the US the quantity 1 price of the HX1 is $48 + shipping
[05:31] <fsphil> it's good fun, after all the pain
[05:31] <fsphil> aah
[05:31] <fsphil> well then that is cheap
[05:32] <KF7FER> I'd have to agree that building it is half the fun... at least :-)
[05:33] <fsphil> I've yet to do a custom pcb in eagle
[05:34] <KF7FER> fsphil: why not?
[05:34] <heathkid> I've done one but never had it printed
[05:34] <heathkid> you have to manual route everything....
[05:34] <fsphil> I started but got distracted
[05:34] <heathkid> well... at least if gives you a starting poing
[05:34] <heathkid> point
[05:35] <KF7FER> I'll pimp http://oshpark.com/. $5/square inch, 3 copies, typical delivery in the US 14 days. Free Shipping.
[05:35] <heathkid> KF7FER: got some extra boards? :)
[05:35] <KF7FER> not as good as some of the East houses, but real reasonable (at least for US buyers) and he's a nice guy and a friend of mine
[05:36] <KF7FER> heathkid - soon :-)
[05:36] <heathkid> I won't have boards done in China... good prices but NOT worth the wait to see if they work... lol
[05:36] <heathkid> KF7FER: let me know
[05:37] <KF7FER> I'm lucky... the local dorkbot group offered a class in learning Eagle for $30, and when the class was over you got 2 square inches in the next board run. Since then, I've been hooked
[05:38] <heathkid> I'm patient KF7FER
[05:38] <KF7FER> So far I've had boards in over 20% of the dorkbot group/Oshpark panels. That just says how bad I am at PCB design
[05:38] <KF7FER> heathkid - I'll have a deal for you
[05:38] <heathkid> I'm actaully pretty good at a PCB design....
[05:38] <KF7FER> I'm like Monty
[05:38] <KF7FER> you use Eagle?
[05:38] <heathkid> just haven't had the guts to do something for real in Eagle yet
[05:39] <heathkid> I have
[05:39] <heathkid> plenty
[05:39] <KF7FER> It was painful to learn for me... to hand route was ugly
[05:39] <heathkid> and then used them to swap over to ExpressPCB
[05:39] <KF7FER> route a trace... press DRC... 100 errors
[05:39] <heathkid> I've been using ExpressPCB since they started
[05:40] <KF7FER> how good is it?
[05:40] <heathkid> excellent! but propriatary
[05:41] <heathkid> use their CAD software.... great boards FAST... and CHEAP... but no Gerber files or nothing to take elsewhere...
[05:41] <KF7FER> ah, ok. Was trying to remember where I heard that name. WhereAVR had files in that format
[05:41] <heathkid> I've been using them since at least 1998 or so
[05:42] <KF7FER> wow. Looked good, but when there was somebody local doing boards... I couldn't do anything else.
[05:42] <KF7FER> local=60 miles, but given the 'net I suppose that's real local
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[05:43] <KF7FER> I like the "fabbed in US" bit, but I really like the 12 day delivery and fairly low cost
[05:44] <heathkid> I like submit my boards and they arrive 3 days later...
[05:44] <heathkid> fabbed in the US
[05:45] <KF7FER> god I wish... the best I had was submit a board on Monday and get it the next Saturday. I'd sell my firstborn to get that kind of turnaround. Just don't tell her I said that
[05:45] <heathkid> but... propriatary
[05:45] <heathkid> look at them... expresspcb.com
[05:46] <heathkid> bad in some ways... but awesome boards
[05:46] <heathkid> and FAST
[05:46] <KF7FER> sigh... it'd be like cheating on my best friend
[05:46] <heathkid> yep
[05:46] <KF7FER> don't tempt me ;-)
[05:46] <heathkid> ok
[05:46] <KF7FER> 3 days eh?
[05:46] <heathkid> yeah
[05:46] <KF7FER> if I can do Eagle, I think I can do anything :-)
[05:47] <heathkid> but you can't send them Eagle files...
[05:47] <heathkid> that's the downside
[05:47] <KF7FER> I'll take a look, thanks
[05:47] <heathkid> you have to use their CAD software and then you're stuck
[05:47] <heathkid> oh, don't thank me...
[05:47] <KF7FER> the American dream isn't it?
[05:48] <heathkid> I wish I had started with Eagle in the first place and done it right from the beginning
[05:48] <heathkid> expresspcb is like a drug
[05:48] <KF7FER> Or not... I almost took my life several times during the learning curve
[05:48] <heathkid> that is VERy addictive
[05:48] <KF7FER> brb
[05:51] <craag> Picotex launch imminent.
[05:56] <fsphil> but it's like 6am
[05:56] <KF7FER> cold eh?
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[06:00] <heathkid> KF7FER: wow!
[06:00] <heathkid> I didn't realize you were who you were...
[06:00] <heathkid> :)
[06:00] <heathkid> thanks!
[06:00] <heathkid> just saw your latest email
[06:03] <natrium42> o_O
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[06:24] <heathkid> I ordered the SFE Pocket AVR Programmer
[06:25] <heathkid> and a few other things
[06:25] <heathkid> like a 600g Kaymont and 36" parashute
[06:26] <heathkid> not that I'll be using them on my first launch
[06:26] <heathkid> first launch will be a couple 3 ft. mylars....
[06:26] <heathkid> just to make sure I have the APRS stuff working
[06:26] <heathkid> and tracking
[06:26] <heathkid> and trying to recover.... :)
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[06:27] <heathkid> the 2nd launch will be a high-altitude minimal float (but lots of pics)
[06:28] <heathkid> gotta start somewhere.... right?
[06:29] <KF7FER> sorry I was gone, think you've done pretty good :-)
[06:31] <KF7FER> family has me a bit sidetracked right now
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[06:32] <heathkid> that happens....
[06:32] <heathkid> I gotta get some sleep anyway...
[06:32] <heathkid> a few timezones east of you
[06:33] <heathkid> more tomorrow....
[06:33] <heathkid> please keep in touch... I really want to do something you'd never expect.... and need your help
[06:33] <heathkid> g'nite
[06:36] <craag> Picotex burst.
[06:37] <Upu> what freq is it on ?
[06:37] <fsphil> clearing jnoss1 from the map
[06:38] <gonzo_> 434.185 tuned here
[06:38] <Upu> Oh I see it
[06:38] <Upu> drafit
[06:39] <Upu> drift
[06:39] <daveake> drifting t'other way, even faster than before
[06:39] <daveake> Still not got a packet
[06:40] <gonzo_> yep it seems to be heating and cooling during the tx/wait cycles
[06:40] <Upu> 7N2 ?
[06:40] <gonzo_> tuning is a mahual job. Fldigi can't keep lock
[06:41] <Upu> and switching between 50/300
[06:41] <Upu> haha
[06:41] <daveake> Well, the combination of large gaps and plenty of drifting makes it very difficult
[06:41] <gonzo_> set 7N1
[06:41] <daveake> and switcvhing
[06:42] <fsphil> switching baud rates was never a good idea
[06:42] <daveake> No, I hate that too
[06:44] <daveake> wow I got a packet
[06:44] <daveake> had
[06:44] <daveake> to retune manually all the way
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[06:44] <Darkside> whose launch is this?
[06:45] <fsphil> the altitude seems stuck
[06:45] <daveake> yep
[06:45] <gonzo_> opening the filters in fldigi helps. But it is drifting almost the extent of the ssb bandwidth
[06:45] <daveake> mattbrejza's
[06:45] <Upu> 36:57,50.996338,-0.855289,11139*289
[06:45] <daveake> Tried that gonzo_
[06:45] <Darkside> is this that little weenie one?
[06:45] <daveake> yes
[06:45] <Darkside> based around the msp430 SoC thing?
[06:46] <Darkside> cool
[06:46] <Darkside> but its not working properly i tak eit?
[06:48] <gonzo_> ah, constant carrier now
[06:49] <Darkside> oh dear
[06:49] <gonzo_> seems to have recovered
[06:50] <gonzo_> falling
[06:53] <Upu> that was up damn early thought it was going to be 9am or something
[06:56] <Upu> oh thats the other launches
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[06:59] <gonzo_> sigs getting weak for me now
[07:00] <LazyLeopard> Hmmm... Only just woke up early enough to catch a few rows...
[07:01] <LazyLeopard> Interesting flight profile. Good luck finding the payload, folks. ;)
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[07:02] <gonzo_> lost sigs altogether now
[07:03] <LazyLeopard> Lost it here a minute or three ago...
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[07:10] <LazyLeopard> Hmmm... Trees...
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[07:10] Action: LazyLeopard yawns
[07:11] <LazyLeopard> Early wake-up was barely early enough...
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[07:11] <gonzo_> and a bit of 11kv clutter. But hopefully they overshot that
[07:12] <gonzo_> was there a chute? Assume so otherwise the descent would have been faster
[07:12] <gonzo_> right, suppose I should go and get ready for work
[07:12] <craag> gonzo_: No chute as such, but a streamer.
[07:12] <jcoxon> morning all
[07:13] <jcoxon> streamers are under used
[07:13] <gonzo_> well it worked well
[07:13] <LazyLeopard> No, I think it's a tracker so small it fits in the balloon's neck...
[07:13] <gonzo_> saw the pics and only 10g!
[07:13] <craag> LazyLeopard: That's right.
[07:14] <craag> I'll upload some pics when i've rebooted into linux.
[07:14] Action: jcoxon 's aim for today is to hit the ISS with an APRS packet
[07:14] <gonzo_> I expect a streamer is has less chance of getting caught in trees etc
[07:14] <Upu> good luck
[07:14] <LazyLeopard> It lost lock for a while after burst? Or just wasn't transmitting cleanly?
[07:15] <Upu> btw jcoxon uBLOX MAX7 power consumption in cyclic 1s mode = 4.5mA @3V
[07:15] <jcoxon> Upu, wow
[07:15] <LazyLeopard> GL jcoxon
[07:15] <jcoxon> you got some yet?
[07:15] <Upu> no December
[07:15] <gonzo_> at one stage I was it go to solid carrier during the sleep period
[07:15] <Upu> I get some samples so think of something interesting we can do with them
[07:15] <jcoxon> LazyLeopard, yeah, now that i've fixed the PTT code in soundmodem to actually control my rig
[07:15] <jcoxon> it'll be easier
[07:15] <Upu> right work calls
[07:15] <Upu> back soon
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[07:23] <craag> Picotex Launch Photos: http://goo.gl/O5UoP
[07:23] <craag> They are a bit blurry, it was a lot darker than it looks!
[07:23] <LazyLeopard> Someone headed out to try to find it, presumably?
[07:24] <craag> LazyLeopard: Yes, mattbrejza is currently out there.
[07:24] <craag> I just went along to the launch, as it was a 5 minute walk up the road!
[07:25] <LazyLeopard> ;)
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[07:59] <LazyLeopard> Ah. Looks positive for recovery ;)
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[08:04] <LazyLeopard> Well, fixes at grounnd level on the tracker, anyway...
[08:04] <gonzo_> Ah yes, see it reappeared then moved. Tis a good sign
[08:06] <gonzo_> it didn't get too high. Overinflation?
[08:07] <jcoxon> didn't get any telem into the iss on that pass
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[08:08] <gonzo_> I've watched packet from ISS, never tried TXing to it though
[08:08] <jcoxon> i'm enjoying the challenge
[08:09] <jcoxon> forced me to make a working aprs station
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[08:10] <jcoxon> heard a packet that was relayed from a station in greec
[08:10] <jcoxon> e
[08:10] <jcoxon> which makes it 2000km
[08:11] <jcoxon> ooo looks like its gone indoors picotex that is
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[08:17] <gonzo_> or that was where the car was parked?
[08:18] <gonzo_> easy recovery by the looks of it. (Hopefully they didn't wake anyone up!
[08:22] <jcoxon> ping Darkside
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[08:38] <Darkside> jcoxon:
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[09:05] <costyn> Friend of mine did a comprehensive test of lots of POV camera's, might be of interest here: http://www.dropzone.com/news/Gear/Best_POV_Action_Camera_Shootout_6_Challengers_Reviewed_854.html
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[09:14] <jcoxon> hey Darkside, quick question about aprs and ISS - what settings did you use for the path?
[09:15] <Darkside> erm
[09:15] <Darkside> forget now
[09:15] <Darkside> SATGATE was one of them
[09:16] <Darkside> there were some guides online
[09:16] <jcoxon> i had a good pass an hour ago
[09:16] <jcoxon> didn't get anything in
[09:16] <jcoxon> even my baofeng was getting some packets indoors on a whip
[09:17] <fsphil> try ARISS
[09:17] <Darkside> yeah i think tht was one of them
[09:17] <fsphil> that worked for me awhile back
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[09:19] <jcoxon> looks like people use RS0ISS-4*
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[09:19] <jcoxon> i've shortened my packet as well
[09:23] <jcoxon> well 9 minutes and i'll try again
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[09:38] <jcoxon> yes?
[09:39] <Darkside> yes?
[09:39] <Darkside> no idea
[09:40] <jcoxon> oh
[09:40] <jcoxon> got a packet in
[09:44] <jcoxon> just one packet :-)
[09:54] <Darkside> woo
[09:55] <Darkside> 2012-11-13 09:38:23 UTC: M6JCX>APX200,RS0ISS-4*,qAR,SR5GK-3:=5129.89N/00003.17Wy
[09:59] <oh7lzb> ARISS what you're supposed to use as path. The ISS digipeater replaces that with it's own callsign, and the * means that the "has digipeated" bit is 1
[09:59] <oh7lzb> ARISS is what ...
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[10:10] <x-f> costyn, is this your friend? :) - http://www.engadget.com/2012/08/15/caption-contest-gopro-gone-wrong/
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[10:16] <LazyLeopard> Whooo! That was a big split!
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[11:06] <mattbrejza> morning
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[11:08] <jonsowman> morning mattbrejza
[11:08] <jonsowman> all went well?
[11:08] <mattbrejza> more or less
[11:08] <jonsowman> .. go on
[11:09] <mattbrejza> well it lost lock for a bit
[11:09] <mattbrejza> must have been spinning lots
[11:09] <mattbrejza> have it back though
[11:09] <jonsowman> fair enough
[11:09] <jonsowman> recovered?
[11:09] <mattbrejza> yep
[11:09] <mattbrejza> a farmer found it and gave it to us as we drove up :P
[11:09] <jonsowman> nice
[11:09] <mattbrejza> didnt even have to leave the car
[11:09] <jonsowman> :D
[11:10] <mattbrejza> i think i annoyed everyone with the off periods however
[11:11] <daveake> no, no, not at all
[11:11] <daveake> yes :)
[11:11] <mattbrejza> well it was fine until it started drifting loads
[11:11] <daveake> Well, that combined with the drifting
[11:11] <mattbrejza> maybe that power saving isnt really needed for a 1hr flight
[11:12] <daveake> :-)
[11:12] <daveake> Any idea why it burst early?
[11:12] <mattbrejza> not really
[11:12] <mattbrejza> all the balloon came down rather than it shredding
[11:12] <mattbrejza> so small flaw/damage
[11:12] <daveake> ok
[11:12] <mattbrejza> thanks for trying to get something, early start and everything
[11:13] <mattbrejza> the expensive crystal really didnt do much for frequency stability
[11:13] <LazyLeopard> What was interesting was the way it didn't drift duringthe off periods nearly as much as it drifted when it was transmitting. ;)
[11:14] <mattbrejza> well its a tiny 2x2.5mm crystal
[11:14] <mattbrejza> however i think it was running all the time
[11:14] <mattbrejza> the caps are external too
[11:15] <mattbrejza> i wasnt actually tracking myself, ment to record it however
[11:16] <mattbrejza> i was slightly worried when after launching and going to the laptop hte altitude suddenly went to -130m
[11:16] <jonsowman> lol
[11:17] <mattbrejza> cc430 now flight proven
[11:17] <mattbrejza> requires bigger crystal
[11:17] <mattbrejza> power saving not always needed
[11:17] <UpuWork> drifty :)
[11:17] <mattbrejza> maybe a higher dynamic mode on the gps would come with the spinning
[11:18] <mattbrejza> well the driftyness is only down to the crystal?
[11:18] <mattbrejza> right at the start of the flight it was barely drifting at all
[11:18] <mattbrejza> then suddenly it fell off a cliff
[11:27] <UpuWork> more insulation needed ?
[11:30] <mattbrejza> probably yea
[11:31] <mattbrejza> it was wrapped round the side
[11:31] <mattbrejza> but hte top poked into the balloon so cold might have got in that way
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[11:34] <gonzo_> I noticed that there was an overall drift, assuming temp related, but a short term and more difficult to cope with drift, as the TX was shut down for powersaving
[11:35] <gonzo_> also I was not able to get a single 300bd decode, even though signals were good.
[11:36] <gonzo_> at 300bd I was getting less than 50% of chars looking sensible
[11:36] <mattbrejza> was it fading in and out pretty fast?
[11:36] <gonzo_> there was a significant fade, yes
[11:37] <mattbrejza> thats probably why then
[11:37] <gonzo_> assume that was it thrashing about being in the neck?
[11:37] <mattbrejza> yea
[11:37] <gonzo_> but even on the 300bd without fading, I got nodecode
[11:37] <NavracWork> was this the pregnancy tester payload?
[11:37] <mattbrejza> yea
[11:38] <mattbrejza> odd, i dont suppose anyone has a recording?
[11:38] <mattbrejza> i ment to do one myself
[11:38] <mattbrejza> 300 baud was more of a preample to the 50 anyway
[11:38] <gonzo_> not here
[11:39] <mattbrejza> suppose the transmitter was probably heating the caps/crystal slightly to cause the short term drift
[11:39] <mattbrejza> its not somethig which i found in testing
[11:39] <NavracWork> probably needed a tcxo with that minimal style insulation.
[11:40] <mattbrejza> well we got it back if nothing else, even if we wwere the only ones to get something useful
[11:41] <gonzo_> I got lots of 50bd packets. Losses were partioally from fading but mainly local qrm
[11:41] <gonzo_> (and forgetting to click the online box!)
[11:42] <mattbrejza> ah that will explain that :P
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[11:43] <gonzo_> my prefernec would be for justy 50bd. And if you need to do opwer save, put a period of a few sec of nulls to let things stabioilise and fldigi to track
[11:44] <gonzo_> but well done on a successfull first test
[11:45] <mattbrejza> lol thats what the 300 baud was for (or so im saying)
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[11:45] <mattbrejza> my thought was 300 baud is quick so why not send some too
[11:45] <mattbrejza> now we know that 300 baud has fading issues
[11:46] <mattbrejza> time to write a channel equaliser for fldigi...
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[13:14] <jcoxon> ping Upu
[13:15] <phreaky> pong jcoxon
[13:15] <UpuWork> hi jcoxon
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[13:33] <griffonbot> Received email: chris hillcox "[UKHAS] Re: advices for a balloon flight"
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[13:33] <griffonbot> Received email: chris hillcox "[UKHAS] Re: advices for a balloon flight"
[13:41] <wibble_> I've just ordered my EZCAP :D
[13:41] <UpuWork> hey Wibble was that from HAB Supplies ?
[13:41] <eroomde> great!
[13:41] <wibble_> Can anyone recommend a particular Ardiuno model ?
[13:42] <wibble_> Yes from HAB Supplies
[13:43] <UpuWork> I'll post it tommorrow now wibble_ :)
[13:43] <UpuWork> well my recommendation is one that runs at 3.3V
[13:43] <wibble_> excellent stuff. Just need an antenna now
[13:43] <UpuWork> it makes life easier
[13:43] <wibble_> I guess for the Ublox GPS ?
[13:44] <UpuWork> yeah I do a 5V one and a 3.3V one but the 3.3V one is cheaper
[13:44] <wibble_> I like cheap ;)
[13:45] <UpuWork> However the NTX2 and the Arduino compatable board I see work at 5V
[13:46] <wibble_> I've also got a PI which I believe is 3.3V ?
[13:47] <UpuWork> I wouldn't use a Pi
[13:47] <UpuWork> not initially anyway,
[13:48] <griffonbot> Received email: chris hillcox "[UKHAS] Balloon Fiesta 2013"
[13:48] <UpuWork> if you do plan on ordering an NTX2 pls speak to me first
[13:49] <wibble_> ok will do I'm not quite there yet :)
[13:49] <UpuWork> not a problem but trust me your wallet will thank you for speaking to me
[13:49] <wibble_> can the ntx2 operate at 3.3v ?
[13:49] <UpuWork> yes
[13:49] <wibble_> so it sounds like the 3.3v ardiuno is the way forward
[13:52] <UpuWork> http://arduino.cc/en/Main/ArduinoBoardProMini
[13:52] <UpuWork> 3.3V version of that
[13:52] <UpuWork> works
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[13:53] <wibble_> thats impressively small!
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[13:54] <UpuWork> it would however be easier to use an Arduino Uno 5V initially
[13:54] <wibble_> yes i found a kit which looked pretty good
[13:54] <wibble_> http://www.coolcomponents.co.uk/catalog/arduino-starter-p-596.html
[13:54] <wibble_> but is 5v
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[14:11] <UpuWork> 5v isn't an issue wibble
[14:11] <UpuWork> the GPS is a little more expensive
[14:11] <UpuWork> but might be easier initially
[14:17] <wibble_> ok for£36 quid for the uno 5v kit, i am sure i can live with it
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[14:24] <nosebleedkt> anyone knows the changes between ublox5 and ublox6 in a brief sentence ?
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[14:25] <nosebleedkt> seeedstudio.com sells gpsbee v2 with a ublox6 chipset which i already got
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[14:35] <griffonbot> Received email: Ed Moore "Re: [UKHAS] Balloon Fiesta 2013"
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[15:16] <number10> daveake: did you bother reading the temperature back on rfm22?
[15:17] <daveake> No
[15:18] <number10> what happend with the end of finger?
[15:18] <daveake> Still taped on
[15:18] <number10> ah - you didnt look
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[15:19] <daveake> I've replaced the dressing, but I've yet to remove the little bits holding it down
[15:19] <jonsowman> lovely.
[15:19] <number10> probably a good idea to leave it a while
[15:19] <daveake> yes :)
[15:22] <daveake> You'll be able to see the dressing on TV soon :D
[15:22] <number10> lol
[15:22] <gonzo_> give it a few hits with the stalple gun
[15:23] <number10> thought you siad that was easter
[15:23] <daveake> well, soonish then
[15:24] <number10> must remember to pack some first aid supplies next launch
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[15:25] <daveake> :)
[15:25] <number10> my pico board runs... strangely the raw value back from the rfm adc is 0xff
[15:26] <Laurenceb> http://i.imgur.com/hIj3A.jpg
[15:26] <number10> when I tried it on my dev board it was fine - so either its the rfm or I have some subtle timing issue
[15:26] <Laurenceb> meanwhile in epic fail land
[15:27] <number10> looks like a few issues with that Laurenceb
[15:28] <Randomskk> Laurenceb: lol oh god
[15:28] <Randomskk> what happened, it reflowed itself while in the downdraft from a prop? :P
[15:28] <Laurenceb> dunno
[15:28] <Laurenceb> was on rcgoups
[15:28] <jonsowman> i'm pretty sure that's how it's meant to look
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[15:31] <UpuWork> Laurenceb your board has a p0rblem
[15:31] <UpuWork> many p0rblems
[15:31] <staylo> It's dead bug soldering taken to its logical conclusion.. gassed anthill soldering
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[15:32] <UpuWork> It looks like all the components are trying to escape
[15:33] <number10> ah UpuWork, did you do a read tem on rfm22 - if so did you ever get a problem with the raw adc value being 0xff?
[15:33] <number10> temp
[15:33] <UpuWork> never read it
[15:33] <UpuWork> I don't think the library I use has temp read in it
[15:33] <number10> ok ta
[15:34] <mattbrejza> ive done similar Laurenceb Randomskk, taped a little board to a bigger one so it was easier to move around and put in the oven
[15:34] <mattbrejza> oc the tape melted
[15:34] <mattbrejza> flipping the board
[15:35] <mattbrejza> ¬.`
[15:35] <mattbrejza> ¬.¬
[15:35] <UpuWork> I wonder if they tried to hot air something and had it on too much pressure
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[16:42] <Laurenceb> http://i.imgur.com/G1PuD.jpg
[16:42] <Randomskk> is that you on the right?
[16:43] <Laurenceb> i couldnt possibly comment
[16:43] <nigelvh> That's one attractive girlfriend you've got there.
[16:44] <eroomde> her milkshake brings all the boys to the yard
[16:44] <kokey> probably less hard work than my girlfriend
[16:45] <griffonbot> Received email: John Underwood "Re: [UKHAS] Launch announcement Wednesday 14th November - Vortex / HelioSS"
[16:46] <DrLuke> Laurenceb: is that your waifu?
[16:46] <Laurenceb> lol waifu
[16:46] <nigelvh> Quiet, attractive, likes milkshakes, what more could a guy want in a wife?
[16:46] <DrLuke> so kawaii~ :3
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[16:47] <Laurenceb> kawaii desu
[16:47] <Laurenceb> weaboo
[16:47] <DrLuke> Laurence~baka~
[16:48] <DrLuke>  _ 
[16:48] <DrLuke> wow, I'm surprised that worked
[16:48] <Laurenceb> lol
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[16:50] <kokey> looks like I might be moving down to cape town
[16:50] <eroomde> oh?
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[16:50] <kokey> don't see much hab action going down in south africa
[16:50] <kokey> will have to change that
[16:51] <kokey> nice thing is most wind goes from cape town inland, and not much cloud so it could make for some very good photos
[16:51] <DrLuke> aren't there a lot of mountains in that region
[16:51] <DrLuke> a jungle and all that shazz
[16:51] <DrLuke> and*
[16:52] <kokey> cape town has a bit of mountain, than another range about 100km in, then it's semi desert and flat
[16:53] <Laurenceb> DrLuke: now youve made me google waifu
[16:53] <Laurenceb> http://myanimelist.net/forum/?topicid=509127&show=20
[16:53] <DrLuke> wow
[16:54] <DrLuke> yeah the normal weeaboo crap
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[18:03] <griffonbot> Received email: chris hillcox "Re: [UKHAS] Balloon Fiesta 2013"
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[18:05] <griffonbot> Received email: chris hillcox "[UKHAS] Re: Balloon Fiesta 2013"
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[18:33] <arko> mornings
[18:34] <jonsowman> hello
[18:34] <jonsowman> did you get the hourly working?
[18:35] <arko> yep :)
[18:35] <jonsowman> excellent
[18:35] <arko> http://predictor.habexproject.org
[18:35] <arko> so happy
[18:35] <arko> thank you for you help the other night
[18:36] <jonsowman> nice one
[18:36] <jonsowman> you're welcome ;)
[18:36] Nick change: daveake_ -> daveake
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[18:42] <nigelvh> daveake your nick always reminds me of cake.
[18:42] <daveake> mmmcake
[18:42] <nigelvh> davecake
[18:43] <nigelvh> You should invent a cake recipie and call it that.
[18:43] <nigelvh> Make it a HABing tradition.
[18:43] <daveake> I'm just surprised that Kevin Bacon isn't a HABber
[18:43] <arko> i want cake now :(
[18:43] <nigelvh> Bacon is similarly important
[18:44] <nigelvh> Perhaps an ice cream cake would be appropriate.
[18:45] <nigelvh> Perhaps bacon wrapped steak followed by cake.
[18:45] <nigelvh> mmmmm steak and bacon and cake.
[18:45] <jonsowman> http://en.wikipedia.org/wiki/Bacon_ice_cream
[18:45] <jonsowman> looks gross.
[18:46] <nigelvh> Yeah.
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[18:46] <nigelvh> There's a local company that makes bacon vodka
[18:46] <nigelvh> which sounds similarly gross.
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[18:47] <nigelvh> One of my old bosses had a package of Gummy Bacon in his office.
[18:47] <nigelvh> Which also sounds terrible.
[18:48] <nigelvh> In summary, adding bacon flavor to things that aren't bacon usually sounds pretty terrible.
[18:48] <nigelvh> Oh, sorry, this is a UK group. It's spelled flavour.
[18:48] <nigelvh> :P
[18:51] <griffonbot> Received email: Ed Moore "Re: [UKHAS] Balloon Fiesta 2013"
[18:55] <KT5TK_QRL> Add a Texas specialty: melted chocolate drizzled over bacon
[18:55] <x-f> "..the historical spectrum of software reliability in the payloads launched by ukhas does not inspire much confidence.."
[18:55] <x-f> aww.. :)
[18:56] <eroomde> well, it doesn't
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[19:04] <nick_> Is it possible to get data from the predictor without the whole map interface?
[19:04] <nick_> Or perhaps not the predictor but the tracker
[19:08] <x-f> nick_, there's the "export payload telemetry" page by Randomskk - http://habitat.habhub.org/ept/
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[19:09] <Lunar_Lander> evening
[19:10] <nick_> I'm trying out the page.
[19:10] <nick_> But it seems to be all the flight's data?
[19:10] <nick_> Is it possible just to get, say, the last transmitted data?
[19:11] <prawnsalad> hey guys. anyone around thats used the ntx2 transmitter?
[19:12] <daveake> yes, many
[19:13] <x-f> nick_, you can parse the logtail - http://habitat.habhub.org/logtail/ - but i'm sure habitat guys will tell you an easier way, i don't know
[19:13] <prawnsalad> ok cool. im not an electronics guy but having a play around.. ive followed the example here to get started: http://ukhas.org.uk/guides:linkingarduinotontx2
[19:14] <prawnsalad> when its up and working the ntx2 gives off a bit of heat. is this normal?
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[19:14] <nick_> What I would ideally like to do would be to provide a URL giving the payload wanted and get returned the current position and the predicted landing position.
[19:16] <daveake> What voltage are you running it from?
[19:16] <daveake> It uses about 20mA IIRC, but of course the more volts the more watts
[19:16] <prawnsalad> its using 5v. running the leonardo ardiuno
[19:17] <daveake> So 100mW then
[19:17] <daveake> It will warm up a little bit. If you're concerned measure the current
[19:18] <Upu> should get too hot, basic rule of thumb if you can touch it its ok
[19:18] <Upu> if you can't touch it turn it off somethings up
[19:18] <prawnsalad> ok thats fine then, definately not that hot
[19:18] <daveake> rule of thumb or indeed finger
[19:18] <Upu> yeah :)
[19:18] <prawnsalad> just mildy warm :)
[19:18] <daveake> Unlikely to cook your prawns then
[19:18] <Upu> in that case there is your payload header
[19:19] <prawnsalad> spent a few hours trying to get this arduino board working. turns it is slightly buggy :(
[19:19] Action: daveake wanders off to check on his Prawn Flambé
[19:22] <Upu> the Leonardo ?
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[19:24] <prawnsalad> yea
[19:25] <prawnsalad> rx on a few pins
[19:25] <Lunar_Lander> evening Upu
[19:25] <Upu> hi Lunar_Lander
[19:25] <Upu> afk food
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[19:47] <x-f> partial eclipse has begun a minute ago, culmination at 8:38 GMT - http://www.cosmosmagazine.com/news/6144/australia-counts-down-solar-eclipse
[19:47] <meatmanek> oh wow it's eclipse day
[19:48] <meatmanek> a few morths ago I was contemplating flying to australia partly for this
[19:48] <DrLuke> livestream: http://www.ustream.tv/channel/panasonic-eclipse-live-by-solar-power-1
[19:49] <number10> i think that may be one of the reasons fsphil has gone downunder
[19:51] <Lunar_Lander> XD
[19:52] <meatmanek> wait
[19:52] <meatmanek> they're using solar power
[19:52] <meatmanek> to cover the solar eclipse
[19:52] <meatmanek> does anybody else see the problem with this? =P
[19:53] <SpeedEvil> partial eclipse
[19:53] <SpeedEvil> on an unrelated matter
[19:53] <meatmanek> I thought this one was supposed to be total
[19:53] <SpeedEvil> another spacex launch this year
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[19:53] <SpeedEvil> hope to see more of the grasshopper
[19:54] <Laurenceb_> is there a way to set a script to run on some files when they are first added to a directory?
[19:55] <Laurenceb_> e.g. user copies files in, and script runs, giving some output files
[19:56] <SpeedEvil> easiest way is to not do that
[19:56] <SpeedEvil> make a directory 'output'
[19:56] <SpeedEvil> cron a script every x Minutes to move all files into output
[19:59] <Laurenceb_> ah so you dump in input
[19:59] <Laurenceb_> and everything is then chucked out in output
[19:59] <Laurenceb_> cool
[19:59] <Laurenceb_> and i could set permissions to make it n00b proof
[19:59] <SpeedEvil> otherwise, you can remember the list of processed files
[19:59] <Laurenceb_> this is shared with a huge windows workgroup of all users of some products....
[20:00] <SpeedEvil> or look for files witut corresponding outputs
[20:00] <Laurenceb_> they dump diagnostics for analysis
[20:00] <Laurenceb_> so lots of potential for idiocy
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[20:01] <Laurenceb_> this is my replacement for a perious system that involved hte users installing matlab and submitting processed data as text files via email
[20:01] Nick change: sonic_ -> Guest98618
[20:02] <Laurenceb_> *facepalm*
[20:02] <SpeedEvil> ow
[20:02] <SpeedEvil> sounds entertaining
[20:03] <SpeedEvil> matkab was being used for text processing?
[20:03] Nick change: Guest98618 -> sonicuk
[20:03] <Laurenceb_> they solved the support issue by buying all the users dedicated laptops and sending via courier
[20:03] <Laurenceb_> well some of the scripts were text, some binary data to csv files
[20:03] <SpeedEvil> hahhaahhahahahhahaahahhahahhahhaha
[20:03] <SpeedEvil> truly inspired.
[20:03] <Laurenceb_> yes
[20:04] <SpeedEvil> medical data, with encryption ignored?
[20:04] <Laurenceb_> yes :P
[20:05] <Laurenceb_> so far about a 95% success rate connecting to the samba share on my server
[20:05] <SpeedEvil> managers designing stuff is so fun.
[20:05] <Laurenceb_> i had to guide a few people through windows explorer...
[20:06] <Lunar_Lander> XD
[20:07] <SpeedEvil> :-)
[20:07] <SpeedEvil> Laurenceb: did some of them write notes about the process in a notebook?
[20:10] <Laurenceb_> its all done by phone
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[20:20] <SpeedEvil> ah
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[20:32] <eroomde> Randomskk / Laurenceb_
[20:33] <Randomskk> hi
[20:33] <eroomde> did i tell you about our little nugget of joy we found earlier?
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[20:33] <Randomskk> don't think so
[20:33] <eroomde> so, at work we have a guy called dave
[20:33] <eroomde> who goes round gov auctions getting electronicsy things
[20:33] <eroomde> usually very old bits of test equipment that doesn;t work, or a big old laser printer, or some cctv cameras or something
[20:34] <eroomde> that kind of thing
[20:34] <eroomde> the stuff worth something he sells on ebay
[20:34] <eroomde> he often gives us random old things that aren;t very ebayable
[20:34] <eroomde> like random old bits of avionics with dodgy wires or whatever
[20:34] <Randomskk> who does that remind me of
[20:34] <eroomde> and we'll perhaps just extract some of the panel mount sma connectors
[20:34] <eroomde> or a milspec connector
[20:34] <eroomde> and chuck the rest into wee
[20:35] <eroomde> y'know, sort of worth salavaging some useful bits for the parts drawer for 10 mins with a screwdriver
[20:35] <eroomde> well, in a bid to clear some stuff out the electronics lab, which has a few crates of all of this random old shit, we decided to wee a load of it
[20:35] <eroomde> with a cursory look at the boxes first to sort of audition if they're worth keeping
[20:36] <eroomde> for teardown
[20:36] <eroomde> or just bin straight away
[20:36] <eroomde> we found one ali enclosure
[20:36] <eroomde> about 20cm long, 15cm wide, 15cm high
[20:36] <eroomde> a single 26 pin milspec connector on one end
[20:36] <eroomde> but quite clean
[20:36] <eroomde> more intrigued we decided to pop the lid off before skipping it
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[20:37] <eroomde> 90% of it is random rectangular boxes with a milspec that sort of regulate an oil pump on an old jet fighter or something dull
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[20:37] <eroomde> anyway we tried this one
[20:37] <Randomskk> I'm on tenterhooks here
[20:37] <eroomde> and there was a pc104 stack at one end
[20:37] <eroomde> in nice condition
[20:37] <eroomde> oooo we thought, nice fairly clean pc104, this was worth opening up
[20:37] <Laurenceb_> *shaggy dong story*
[20:37] <eroomde> hmmm what's this at the other end
[20:37] <eroomde> there was a metal cycliner, 10cm dia and 10cm tall
[20:38] <eroomde> with a little rubber coupling ring round the middle to a chasis mount, looked like some kind of dampening mount
[20:38] <eroomde> it say 'honeywell' on the top, and a number
[20:38] <eroomde> googled the number
[20:38] <Laurenceb_> hehe
[20:38] <eroomde> HOLY
[20:38] <eroomde> tactical grade inertial measurement unit
[20:38] <eroomde> 3 x laser ring gyroscopes
[20:38] <Laurenceb_> lol
[20:38] <eroomde> 3 x quartz resonator accelerometers
[20:39] <eroomde> rs422 interface
[20:39] <eroomde> a mind boggling specification
[20:39] <Laurenceb_> nice
[20:39] <Randomskk> haha
[20:39] <Randomskk> niiice
[20:39] <Lunar_Lander> XD
[20:39] <Laurenceb_> going on the rocket?
[20:39] <eroomde> like, astonishingly good drift performance
[20:39] <eroomde> you could keep it running for hours and maybe loose a degree
[20:39] <eroomde> that's with a response of up to 1600degs/s
[20:39] <eroomde> no way it's going on a rocket!
[20:39] <eroomde> we're going to make it our lab reference
[20:39] <Laurenceb_> :P
[20:40] <eroomde> for calibrating our own imus
[20:40] <Laurenceb_> skylon guidance?
[20:40] <Laurenceb_> ah
[20:40] <Laurenceb_> sounds handy
[20:40] <eroomde> oh not skylon, they can trivially afford just to buy them new
[20:40] <Laurenceb_> lol
[20:40] <eroomde> but yeah, this thing as got to be at least 100,000USD new
[20:40] <Laurenceb_> i will await the results of mems benchmarking
[20:40] <eroomde> us too!
[20:40] <Laurenceb_> would have been kind of bad to skip it
[20:41] <eroomde> it should be an amazing reference
[20:41] <Randomskk> blimey
[20:41] <eroomde> yeah!
[20:41] <Randomskk> wonder what it came from
[20:41] <eroomde> like
[20:41] Action: Laurenceb_ is working on trivial things
[20:41] <eroomde> best find in a bit of old crud ever
[20:41] <eroomde> it's been sitting in the lab for about 2 years too
[20:41] <Laurenceb_> trying to design a low noise photodiode preamp
[20:41] <eroomde> we only came across it because we were doing geological exgavations through old boxes to clear some space
[20:42] <eroomde> so combined with news of my social life tomorrow, today has been a pretty awesome day
[20:42] <Randomskk> I bet
[20:43] <SpeedEvil> eroomde: some quality dumpsters there :-)
[20:43] <eroomde> lol yeah
[20:43] <eroomde> everybody needs a dave
[20:43] <eroomde> the odd thing is, the insides hadn;t been wired up
[20:43] <eroomde> the case was clearly machines from solid ali
[20:44] <eroomde> so
[20:44] <eroomde> it looks like someone's really quite expensive internal r&d thing that got shelved for some reason
[20:44] <Randomskk> what stories that kinda thing could tell
[20:44] <Randomskk> shame you can basically never know
[20:44] <SpeedEvil> a lab reference IMU?
[20:45] <SpeedEvil> isn't that the floor?
[20:45] <Laurenceb_> lol
[20:46] <eroomde> hoho
[20:46] <eroomde> would be done in conjunction with a turn table on a pan/tilt table
[20:46] <eroomde> just take the honeywell output as the reference
[20:47] <SpeedEvil> :-)
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[20:52] Action: Laurenceb_ is reading the register
[20:52] <Laurenceb_> ""Tiles to the right of them, Tiles to left of them, Tiles in front of them" - Alfred Tennyson, The Charge of the Metro Brigade (1854)"
[20:52] <Laurenceb_> pmsl
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[20:55] <Laurenceb_> i see they have a balloon board for their half baked project
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[20:58] <Lunar_Lander> Laurenceb_ where?
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[21:01] <Laurenceb_> http://www.theregister.co.uk/2012/11/13/lohan_board/
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[21:05] <Upu> sort of
[21:06] <Upu> I leant them one to have a play round with
[21:08] <Lunar_Lander> ah
[21:16] <Laurenceb_> Upu: i wouldnt expect anything to ever get done
[21:16] <Laurenceb_> they seem terminally disorganised
[21:16] <Upu> well its not the reg doing it really
[21:17] <Upu> its a guy called Neil who was at the conference
[21:17] <Laurenceb_> lol
[21:17] <Laurenceb_> it is _now_
[21:17] <Laurenceb_> after they persuaded him
[21:17] <Laurenceb_> theres a reason openpilot told them to piss off
[21:17] <Lunar_Lander> oh
[21:17] <Lunar_Lander> like Oliver?
[21:18] <Laurenceb_> your words not mine
[21:19] <eroomde> Lunar_Lander: what do you mean like Oliver?
[21:20] <Laurenceb_> genius comments as always "Electronic Rocket Engine Control Trigger. ERECT"
[21:20] <Randomskk> I saw the best comment today
[21:20] <Randomskk> on the wired article about mcafee
[21:20] <eroomde> go on
[21:20] <eroomde> see if you can match my monologue
[21:20] <Randomskk> http://www.wired.com/threatlevel/2012/11/threatlevel_1112_mcafee/
[21:20] <Randomskk> I'll assume you've read it
[21:20] <Randomskk> or at least heard of it
[21:20] <Lunar_Lander> ah wasn't it like that Oliver constantly wrote off-topic on the mailing list, i.e. if balloons can be desinfected and so on?
[21:21] <Randomskk> though the jist is that he's gone batshit crazy, may have shot his neighbour after his dogs got poisoned (though he blames the government for that)
[21:21] <Randomskk> and is currently in hiding in belize
[21:21] <eroomde> very good
[21:21] <Randomskk> but posted photos of himself topless without a shotgun
[21:21] <Randomskk> I mean, he said things like
[21:21] <Randomskk> "You can say I'm paranoid about it but they will kill me, there is no question. They've been trying to get me for months"
[21:22] <Randomskk> while the police are like "We don't have anything personal against Mr. McAfee. There is no need for us to poison dogs."
[21:22] <Randomskk> anyway the comment was "The fair thing for authorities to do would be to give McAfee a free 30-day trial."
[21:22] <SpeedEvil> hahhah
[21:22] <Lunar_Lander> XD
[21:23] <daveake> stolen for my FB :)
[21:23] <Laurenceb_> that article seems a little... too crazy
[21:23] <Randomskk> the whole thing is _insane_
[21:23] <Randomskk> look at the photos!
[21:23] <Laurenceb_> im not sure how much of the crazy is mcafee or the author
[21:23] <Randomskk> he apparently hid in the grounds of his house, buried in sand, with his head in a cardboard box
[21:23] <Randomskk> the wired guy has been livetweeting updates too
[21:23] <Laurenceb_> i read that as troll
[21:23] <SpeedEvil> ...
[21:23] <Laurenceb_> but maybe my trollometer is oversensitive
[21:23] <Randomskk> while we were eating dinner tonight it was like "the police have raided the house next door but I have evaded them for now"
[21:24] <Laurenceb_> you can find silly shots on most peoples facebook pages
[21:24] <Laurenceb_> but yes he may well be crazy...
[21:25] <Laurenceb_> maybe im too cynical
[21:26] <Lunar_Lander> isn't he like almost 70 years old?
[21:27] <Laurenceb_> or i thought i was reading the register and was expecting overblown tabloid sillyness
[21:27] <Randomskk> 67
[21:27] <Lunar_Lander> yea
[21:27] <jonsowman> the register? overblown tabloid silliness? never
[21:28] <jonsowman> maybe i'm too cynical as well.
[21:28] <Lunar_Lander> hello jonsowman
[21:28] <jonsowman> hello
[21:28] <Lunar_Lander> well do they try to make a rockoon?
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[21:32] <Broliv> Evening all
[21:34] <eroomde> yo Broliv
[21:35] <arko> SUP
[21:35] <eroomde> yo arko
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[21:36] <arko> sup dude
[21:36] <eroomde> well
[21:36] <eroomde> seeing as u ask
[21:36] <Randomskk> haha
[21:36] <eroomde> ure the sort of person who'll appreciate this i think :D
[21:36] <Randomskk> brace
[21:36] <eroomde> i signed up to go see a talk tomorrow in oxford by elon musk
[21:36] <Broliv> Hey eroomde
[21:36] <eroomde> i think my job's email addy caught some attention
[21:36] <daveake> :)
[21:37] <eroomde> cos i got an email today inviting me for private drinks with him afterwards
[21:37] <Broliv> nice
[21:37] <nigelvh> Fancy pants.
[21:37] <eroomde> I KNOW :D
[21:37] <Broliv> lol
[21:37] <nigelvh> Do you have pants fancy enough for said occasion?
[21:37] <eroomde> i'm not sure i do to be honest
[21:38] <SpeedEvil> eroomde: awesome!
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[21:38] <nigelvh> Well, there's two routes. Get fancy pants and act fancy, or wear jeans and be average joe awesome dude.
[21:38] <eroomde> not just me i hasten to add
[21:38] <eroomde> i think there are a few people going to this drinks thing afterwards
[21:38] <nigelvh> I would suspect so.
[21:39] <Lunar_Lander> what you will meet Elon Musk?
[21:39] <arko> eroomde: NICE!
[21:39] <arko> musk is a cool dude
[21:39] <Lunar_Lander> well he didn't really do things right
[21:39] <arko> i met him at spacex a few months back
[21:39] <arko> he was busy and only chatted a bit
[21:39] <Lunar_Lander> he still thinks the one engine on the last Falcon 9 didn't explode
[21:39] <arko> i think he has a social disorder :/
[21:39] <eroomde> lol
[21:39] <eroomde> geekism
[21:39] <arko> very awkward to talk to
[21:40] <SpeedEvil> explode has specific technical meaning
[21:40] <arko> but when it's exactly about something he's good
[21:40] <eroomde> i met him a few years ago at MIT, back b4 he was as famous.
[21:40] <SpeedEvil> like detonate
[21:40] <arko> haha
[21:40] <Lunar_Lander> eroomde, even before he invented PayPal?
[21:40] <eroomde> he came to talk at the seds thing
[21:40] <nigelvh> Lunar from what I read, it didn't explode. It broke because it collapsed under external forces after the engine shut down.
[21:40] <eroomde> Lunar_Lander: yes correct. i was into seds when i was 11
[21:40] <Lunar_Lander> but weren't the engines still burning when something flew off?
[21:41] <nigelvh> The other 8
[21:41] <Lunar_Lander> hm
[21:41] <nigelvh> The computer detected an issue with one, shut that one down, and then the pressure caused that one's fairing to collapse.
[21:41] <Lunar_Lander> but I remember the other incident in which an engine failure wasn't talked about until an NASA audit
[21:41] <nigelvh> That I don't know about. I'm just recalling what I read about the most recent issue.
[21:42] <arko> eroomde: glad to hear oxford has good talks
[21:42] <Lunar_Lander> yea
[21:42] <eroomde> yeah
[21:42] <Lunar_Lander> nigelvh, the second Falcon 9 I think
[21:42] <arko> found out that gangnam guy had one a while back
[21:42] <eroomde> it's at the sheldonian theatre
[21:42] <eroomde> which is quite pretty
[21:42] <Lunar_Lander> Sheldon!!!
[21:42] <arko> he's real
[21:42] <eroomde> cold shower Lunar_Lander
[21:42] <jonsowman> lol
[21:43] <eroomde> i'm seeing him again on friday in london infact, where he's giving a talk at the royal aero society
[21:43] <eroomde> i booked the london one first, a while ago
[21:43] <eroomde> then saw one in oxford about a 10 minute walk away more recently
[21:43] <eroomde> so decided i might aswell
[21:43] <eroomde> decision = correct
[21:43] <nigelvh> Aren't you Mr. Popular.
[21:43] <Broliv> lol
[21:43] <arko> you should wear a funny hat
[21:43] <eroomde> just putting some pics and videos of stuff we've done on my ipad
[21:43] <eroomde> y'know, just incase
[21:44] <arko> then he will be like "that dude with the funny hat keeps showing up"
[21:44] <arko> dude, totally that would be cool
[21:44] <nigelvh> Nosecone
[21:44] <nigelvh> = hat
[21:44] <arko> bring a resume :P
[21:44] <eroomde> engine baffle
[21:44] <eroomde> lol, i don't want to work there
[21:44] <eroomde> i mean, it would be good
[21:45] <eroomde> but i think i'm working in one of the few places in the world that could out-sexy it
[21:45] <Upu> ping mattbrejza - can I remove PICOTEX from spacenear.us pls ?
[21:45] <eroomde> or at least give it a run
[21:45] <eroomde> totally different scales of course
[21:45] <nigelvh> Well, if you decline, tell him "Sorry, but I know this cool guy nigelvh that you should totally look up"
[21:45] <SpeedEvil> https://www.youtube.com/watch?v=VXJZVZFRFJc&feature=youtube_gdata_player but with a cylinder on top, as grasshopper
[21:47] <eroomde> arko: i basically just want to ask if i can go for a visit in feb when i'm your way
[21:49] <Broliv> What are the talks on?
[21:49] <eroomde> tomorrow it's more futurey techy entrepeneurey
[21:49] <eroomde> friday is spacex
[21:50] <Broliv> cool
[21:50] <SpeedEvil> http://en.wikipedia.org/wiki/Have_Space_Suit%E2%80%94Will_Travel
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[21:52] <arko> eroomde: that would be cool
[21:52] <arko> if that doesn't work out
[21:52] <arko> i'll ask my friends at spacex to give us tours
[21:52] <arko> ;)
[21:52] <eroomde> awesome!
[21:53] <arko> :)
[21:53] <arko> should be fun, i love going there
[21:53] <eroomde> i quite want to absorb lots of details
[21:53] <eroomde> workshop layouts
[21:53] <eroomde> power distribution
[21:53] <arko> haha, if they share it
[21:53] <eroomde> office layouts
[21:53] <arko> dude
[21:53] <arko> its insane
[21:53] <arko> all under one roof
[21:53] <arko> im use to nasa
[21:53] <eroomde> well yeah, we're trying to do the same
[21:54] <arko> where it's a bunch of different facilities and buildings
[21:54] <eroomde> but with just 3 people
[21:54] <arko> haha
[21:54] <eroomde> but want to see how it scales
[21:54] <eroomde> it's their manufacturing techniques and supply chain that i admire most about them
[21:54] <arko> yeah
[21:54] <eroomde> there's not that much actual novel rocket science
[21:54] <eroomde> i don't mean that as a criticism
[21:54] <eroomde> i mean it's sensible
[21:54] <arko> sadly
[21:55] <eroomde> they're grokked how to do it and i making it damn efficient
[21:55] <SpeedEvil> not much novel is the awesome bit in many ways
[21:55] <eroomde> they've*
[21:55] <SpeedEvil> you do not go into aerospikes because they look cool
[21:55] <arko> they are keeping a lot of things out of the public too
[21:55] <eroomde> if grasshopper turns into a working system, that will be very novel
[21:55] <SpeedEvil> indeed!
[21:56] <Broliv> very true
[21:56] <arko> i want to finish school asap so i can work on grasshopper
[21:56] <SpeedEvil> I wonder if the aim is to use it for all first stages
[21:56] <eroomde> that would be v exciting
[21:56] <arko> i got a job offer from them a while back and said that i'd rather give 100%
[21:56] <arko> it is a far commute for me
[21:56] <eroomde> thought i am still biased towards wings :)
[21:56] <SpeedEvil> or the outside ones In heavy configurations
[21:56] <arko> but damn am i sad for not taking it :<
[21:56] <arko> i like the concept
[21:57] <arko> hard to imagine how it works
[21:57] <arko> the failure modes just scare me
[21:57] <eroomde> yeah me too
[21:57] <SpeedEvil> wings have failure modes too
[21:57] <eroomde> sure
[21:57] <arko> haha
[21:57] <eroomde> they can fall off
[21:58] <arko> my flight instructor told me this
[21:58] <arko> wings dont fall off
[21:58] <arko> you fall off the wings
[21:58] <arko> :)
[21:58] <SpeedEvil> :-)
[21:58] <arko> i lul
[21:58] <eroomde> but yeah, the reason i want to stay here is because i think our approach to reusability makes a bit more sense from a blank sheet pov
[21:59] <eroomde> and if we can get the funding, without needing to fund ourselves with sales, then i'd rather work on it this way
[21:59] <arko> that would be cool
[21:59] <arko> uk seems like a nice place to work too
[22:00] <eroomde> but the self-bootstrapping, evolutionary approach of spaceX is v appealing too
[22:00] <eroomde> and relighting and landing the stages i can see is v attractive if you already have rockets
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[22:01] <eroomde> but, we have the precooler. and that opens up some very interesting possibilities
[22:01] <eroomde> i've never worked outside the uk for any length of time so have no idea really how it compares
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[22:01] <arko> not sure how the stress/overtime is in the uk private world
[22:01] <SpeedEvil> well, with the precooler, hot climates should be fine.
[22:01] <arko> but here it's madness
[22:02] <eroomde> other than that it's a kinda half-way house between the US and europe, in terms of entrepeneurship, job security, annual holiday
[22:02] <arko> im sure it's the same over there
[22:02] <eroomde> and all those things
[22:02] <eroomde> yeah the whole 2 weeks holiday a year thing i could not do
[22:03] <Randomskk> though it seems a few US companies are coming around to a more sensible view
[22:03] <eroomde> it takes me 2 weeks just to switch off from work sometimes :)
[22:03] <arko> it's horrible
[22:04] <arko> i haven't had "holiday" (we call vacation :P) in 2 years
[22:04] <arko> and im govt
[22:04] <arko> but special case
[22:04] <arko> most private industry is the same
[22:04] <arko> the pressure is huge
[22:04] <arko> americans love lawsuits
[22:05] <arko> so you have to be careful
[22:05] <arko> :/
[22:05] <eroomde> i like the system here. you can have a meaty 2 or 3 week main holiday, and then still have stuff left over for like long weekends away
[22:05] <eroomde> or those plans that crop up at shorter notice than an annual holiday
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[22:06] <arko> heh
[22:06] Nick change: grumbleist -> Guest62541
[22:06] <eroomde> or the gap between christmas and new year if you have a stingy employeer who counts that as part of your allowance
[22:06] <Broliv> Thats if you can take christmas off
[22:07] <Broliv> I work over christmas
[22:07] <eroomde> medic?
[22:07] <Broliv> No, website hosting
[22:08] <arko> oh man
[22:08] <arko> sys admins here have it bad
[22:08] <arko> lots of overtime (at least the ones i know)
[22:08] <arko> i feel bad for em
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[22:09] <Broliv> what do you do arko?
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[22:09] <arko> software dev at nasa
[22:10] <Broliv> sweet
[22:10] <arko> its cool, but the others have the cooler jobs
[22:10] <arko> it's been 3 years 230days and 20 hours since Rob Manning promised me his job
[22:10] <arko> still don't have it >:(
[22:11] <eroomde> lol
[22:11] <eroomde> make a poster
[22:11] <arko> hahaha
[22:11] <arko> i'm going on strike outside his office now
[22:11] <arko> brb
[22:13] <arko> what i would give to have him as my mentor
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[22:14] Action: Laurenceb_ is still thinking about photodiode amplifiers
[22:14] <Laurenceb_> i worked out how to get to 10^-15W/sqrt(hz) .... but it uses 2Watts of power
[22:15] <arko> yikes
[22:16] <Laurenceb_> photodiode directly onto a low gate capacitance mosfet
[22:16] <Laurenceb_> then use photocurrent to discharge the voltage
[22:16] <Laurenceb_> whilst pulling a lot of current through the fet
[22:17] <Laurenceb_> differentiate current vrs time
[22:17] <Laurenceb_> problem is everything needs to be run with a ton of current to keep the noise down
[22:18] <Laurenceb_> also sticking it all on a peltier at -40C would give massively better results - 10^16 W/sqrt(Hz)
[22:18] <Laurenceb_> but _tons_ of power for that
[22:18] <SpeedEvil> this is for what?
[22:18] <eroomde> liquid helium cooling Laurenceb_
[22:19] <Laurenceb_> infrared downlink from a balloon
[22:19] <eroomde> it's the medical device industry way
[22:19] <Laurenceb_> my existing setup is 10^-13W/sqrt(Hz)
[22:19] <Laurenceb_> with 50p worth of parts and 600microamps...
[22:20] <SpeedEvil> Laurenceb: optical filter, and a lens
[22:20] <Laurenceb_> getting to the noise floor of the sensor is hard :(
[22:20] <Laurenceb_> amplifier noise is the issue
[22:20] <eroomde> modulate the bitch up with a spreading code
[22:20] <SpeedEvil> indeed
[22:21] <Laurenceb_> hmm yeah...
[22:21] <eroomde> this is how we extract stuff from 20,000 leagues (about 15dB) beneath the noise floor
[22:21] <SpeedEvil> I got nice numbers in principle for my lidar.
[22:21] <Laurenceb_> my existing setup is 10KHz bandwidth
[22:21] <arko> woah
[22:21] <Laurenceb_> - medical frontend design
[22:21] <arko> how in the world?
[22:21] <SpeedEvil> simply by correlating, and integrating
[22:21] <arko> ok
[22:21] <arko> that makes sense
[22:22] <Laurenceb_> im not sure it helps...
[22:22] <SpeedEvil> GPS is way below the noise floor
[22:22] <arko> but doesnt that mean you can only pull slow datarates?
[22:22] <Laurenceb_> ok i guess shannon says it does
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[22:22] <eroomde> hmm not mega helpful
[22:22] <Laurenceb_> as im power limited
[22:22] <Laurenceb_> so need more bandwidth
[22:22] <SpeedEvil> Laurenceb: laser diode, and 5nm half bandwidth fikter
[22:23] <eroomde> it basically gives you a processing gain equal to the spreading code length
[22:23] <Laurenceb_> atm i have transimpedance amplifier
[22:23] <Laurenceb_> they suck
[22:23] <Laurenceb_> but its veyr hard to design better :(
[22:23] <arko> i need to read more on this
[22:23] <Laurenceb_> and you need to eat a lot of current
[22:23] <SpeedEvil> somewhere, I have a 780nm diode, and a 4nm fkter
[22:23] <arko> noted
[22:23] <eroomde> so for gps, it's a 1023 bit long spreading code
[22:23] <eroomde> ~ 1000 long
[22:23] <eroomde> so about 30dB processing gain
[22:23] <SpeedEvil> really not.
[22:24] <eroomde> and kapow, we are no longer 15dB below the noise floor
[22:24] <SpeedEvil> it's more often 20times that
[22:24] <Laurenceb_> wait
[22:24] <SpeedEvil> once you're locked
[22:24] <arko> bizzar
[22:24] <SpeedEvil> at least
[22:24] <Laurenceb_> maybe shannon says a crappy noise floor but ultrawide frontend is best
[22:25] <Laurenceb_> hmm i hadnt thought of that
[22:25] <Laurenceb_> we could set optical record with a hab
[22:25] <eroomde> yeah
[22:25] <eroomde> worth trying for sure
[22:25] <eroomde> would not it be easier to shoot a really powerful ground laser up at a hab?
[22:25] <Laurenceb_> hmm
[22:25] <eroomde> in terms of link budget
[22:26] <Laurenceb_> i was thinking a few hundered watts of unfocuessed 870nm leds
[22:26] <Laurenceb_> on RC lipo cells
[22:26] <eroomde> laaaaser
[22:26] <eroomde> i have lasers on the brain
[22:26] <SpeedEvil> you mean with a corner cube?
[22:26] <arko> wow ok
[22:26] <arko> this is really cool
[22:26] <eroomde> lol yeah, get x2 the record for free
[22:26] <Laurenceb_> hard to aim
[22:27] <eroomde> scan it
[22:27] <eroomde> like a barcode
[22:27] <Laurenceb_> i have a galvo system...
[22:27] <Laurenceb_> ill do the numbers on : http://redlum.xohp.pagesperso-orange.fr/electronics/wideband.html
[22:27] <Laurenceb_> in 1MHz spread spectrum with leds
[22:27] <Laurenceb_> bbl
[22:28] <Randomskk> aren't barcode readers line lasers?
[22:28] <eroomde> yeah i think so
[22:28] <eroomde> but details
[22:29] <eroomde> like a laser dotprojector then
[22:29] <eroomde> http://elm-chan.org/works/vlp/report_e.html
[22:29] <Randomskk> a lot of them use holograms
[22:29] <Randomskk> you can shine a laser through a phase modulating lcd
[22:30] <Randomskk> the transparent parts act as rectangles that get fourier transformed for some reason
[22:30] <Randomskk> optics is weird
[22:30] <eroomde> yeah i remember fergus coming back from a pysics lecture
[22:30] <Randomskk> but you display a fourier transform on a phase modulating lcd and shine a point laser through and you get the original image back
[22:30] <eroomde> having made a high pass filter our of bits of glass
[22:30] <eroomde> that basically just left the outline of whatever they were projecting
[22:30] <Laurenceb_> i was reading about that optical frequency OFDM system
[22:30] <eroomde> and having a woah moment
[22:30] <Randomskk> yea
[22:31] <Randomskk> my friend did this https://fbcdn-sphotos-d-a.akamaihd.net/hphotos-ak-snc6/177343_10152254737590637_447191399_o.jpg
[22:31] <Laurenceb_> wish id thought of that
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[22:31] <Laurenceb_> potentially terabit ethernet through plastic step index fibre
[22:32] <Lunar_Lander> hi EspacioCercano
[22:33] <eroomde> but yeah, laser on the ground, retro on payload, galvo scanning
[22:33] <Lunar_Lander> Awesome! https://www.youtube.com/watch?v=j_OyHUqIIOU&feature=related
[22:33] <SpeedEvil> damn.
[22:34] <SpeedEvil> I hate eBay's new retarded search
[22:34] <SpeedEvil> if I search for laser diodes, I do -not- want it to match diode
[22:34] <RG_LZ1DEV> there was a time when it wasnt retarded?
[22:34] <SpeedEvil> it now no longer supports wildcards
[22:34] <SpeedEvil> retardation just went nuclear
[22:35] <eroomde> there is a muslim butchers in watford
[22:35] <eroomde> who are lionel ritchie fans
[22:35] <eroomde> called
[22:35] <eroomde> Halal, is it meat you're looking for?
[22:35] <SpeedEvil> I am interested to know how I'm supposed to award for ds18* parts on eBay
[22:35] <SpeedEvil> ...
[22:38] <Lunar_Lander> did you see the water balloon?
[22:39] <SpeedEvil> supposed to search
[22:46] <Laurenceb_> eroomde: but how do you modulate the retroreflector
[22:46] <Randomskk> lcd?
[22:46] <eroomde> possibly yeah
[22:47] <SpeedEvil> lcds tend to have unpleasant optical properties
[22:49] <SpeedEvil> I wish those eBay galvos were available bare
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[23:11] <Broliv> eroomde if you leave before I notice, just to say enjoy tomorrow. I'm extreamly jealous.
[23:13] <eroomde> Broliv: thanks
[23:13] <eroomde> i am trying to find my suit
[23:13] <eroomde> the problem with working in a shed in the middle of nowhere is that 'suit' becomes a bit of a distant memory
[23:13] <eroomde> i know i have one
[23:13] <eroomde> somewhere
[23:13] <Broliv> lol
[23:14] <eroomde> infact i just found it
[23:14] <Broliv> huzzar
[23:14] <eroomde> might have to visit somewhere with a trouser press tomorrow
[23:15] <Broliv> use a damp towel
[23:15] <eroomde> and thank the lord the shirt i found is just like machine washable and tumbedryable
[23:15] <Broliv> no need for a trouser press
[23:15] <eroomde> the invitation said 'business attire'
[23:15] <eroomde> but i suspect they don;t have my business in mind
[23:15] <Broliv> lol, no bin bags or birthday suits then
[23:15] <Broliv> spoil sports
[23:15] <eroomde> lol
[23:16] <eroomde> i was thinking jeans and a hoodie
[23:16] <eroomde> and sometimes a boiler suit
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[23:17] <Broliv> I miss wearing overalls, sadly fixing someones website does not require me getting my hands dirty
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[23:30] <Broliv> Night all
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[23:33] <Laurenceb_> http://www.afrotechmods.com/groovy/open_source_hardware/open_source_hardware.htm
[23:34] <SpeedEvil> http://code.google.com/p/homecmos/
[23:36] <arko> haha
[23:36] <arko> nyancat
[23:36] <arko> nyanocat
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[00:00] --- Wed Nov 14 2012