highaltitude.log.20121127

[00:02] <daveake> Cheers. More to do, but not much.
[00:02] <daveake> Anyway nn
[00:03] <Lunar_Lander> night
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[02:47] Action: heathkid is still looking for an APRS decoding solution... :(
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[02:47] <heathkid> everything I've looked at are so complicated with so many settings... isn't there an easier way?
[02:53] <natrium42> for which language?
[02:53] <natrium42> aprs is a mess
[02:57] <heathkid> AFSK 1200 baud
[02:58] <heathkid> regarding language... I prefer English. :)
[02:58] <natrium42> oh, i thought you wanted to decode it n your code
[02:58] <heathkid> that's be nice
[02:58] <heathkid> that'd
[02:59] <heathkid> I'm just looking for *anything* that will decode *reliably*
[02:59] <natrium42> i see, but you are going from audio, right?
[02:59] <heathkid> yes
[02:59] <natrium42> there is a library for python that decodes the packet
[02:59] <heathkid> sound card (Windows)
[02:59] <heathkid> hmm
[03:00] <natrium42> but i don't know about any library going from audio
[03:00] <heathkid> sounds like a project for a Raspberry Pi
[03:00] <heathkid> a small handheld receiver that outputs the data stream would be awesome!
[03:03] <natrium42> https://itunes.apple.com/us/app/packet-pad/id385609173?mt=8
[03:03] <natrium42> looks interesting
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[03:20] Nick change: zamabe_ -> zamabe
[03:31] <heathkid> I have no apple products
[03:31] <SpeedEvil> I have one.
[03:31] <SpeedEvil> it's a composition b+w monitor
[03:32] <SpeedEvil> composite
[03:41] Nick change: benoxley_ -> benoxley
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[04:50] <arko> evening
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[05:30] <fsphil> morning :)
[05:40] <x-f> morning!
[05:41] <x-f> couldn't sleep after switching timezones?
[05:42] <SpeedEvil> :-)
[05:43] <SpeedEvil> fsphil: flight back OK?
[05:44] <natrium42> back2reality
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[05:50] <fsphil> yea all back, and wide awake :)
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[05:57] <arko> fsphil: you need to follow these instructions very carefully
[05:57] <arko> 1) create high altitude balloon with a controlled ballast
[05:58] <arko> 2) tie Milch Tender to it
[05:58] <arko> 3) Release it at the right time so it lands at my house
[05:58] <arko> please send crates
[05:58] <arko> thanks you
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[06:30] <fsphil> hmm.. could be a challange, and require funding
[06:31] <arko> your country got chocolate right
[06:31] <fsphil> very good stuff it is too
[06:36] <fsphil> a mouse had gotten into my shed where I do my soldering, and made a mess on the bench :/
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[06:37] <arko> jokes on it
[06:37] <arko> lead will probably kill it
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[07:11] <arko> fsphil: http://ehsm.eu/index.html
[07:11] <arko> wish i was in the country to go
[07:11] <arko> looks interesting
[07:16] <fsphil> that's a fine bunch of people
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[07:20] <fsphil> <random rant> hate contact-us forms that don't tell you if they actually sent the message </random rant>
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[07:30] <arko> they only guy i know is Ben Krasnow
[07:30] <arko> that dude plays with X-rays
[07:30] <arko> in my book, he has balls
[07:31] <arko> http://www.youtube.com/user/bkraz333
[07:31] <eroomde> no flooding yet
[07:31] <arko> his hybrid engine is pretty cool
[07:34] <fsphil> just windy here
[07:35] <eroomde> fsphil: super dangerously close here
[07:36] <eroomde> they've put flood defenses (artificial banks) along our portion of the thames
[07:36] <eroomde> and it's using them
[07:36] <eroomde> i am praying the bloody rain stops for a few days and there's enough capacity to drain it all down
[07:37] <eroomde> as being flooded really would be annoying
[07:37] <arko> yikes
[07:38] <eroomde> it's a bit annoying
[07:38] <arko> i bet
[07:38] <eroomde> arko: booked all my flights on sun
[07:38] <arko> we never get rain :(
[07:38] <arko> oh no way!
[07:38] <arko> btw: http://www.youtube.com/watch?v=TLPWqCMb7DE&feature=plcp
[07:38] <eroomde> so it;s fo definite now
[07:38] <arko> sweet
[07:38] <arko> what days should i book in my calendar?
[07:38] <arko> we need to get a visitor form filled out for ya
[07:38] <eroomde> nice though that looks a smite sobsonic to me
[07:39] <eroomde> arko: done that for jpl
[07:39] <arko> with tom?
[07:39] <eroomde> yep
[07:39] <arko> ok
[07:39] <eroomde> and mentioned you coming for lunch :)
[07:39] <eroomde> or whatever
[07:39] <arko> oh what
[07:39] <eroomde> but you also mentioed a visit to spacex?
[07:39] <arko> yes, i need to talk to my friends who work there
[07:40] <arko> see whats up with that
[07:40] <eroomde> cool
[07:40] <arko> ok, so you know, per regulation, tom can't hand you over to me
[07:40] <arko> fyi
[07:40] <arko> so i can join you guys for lunch
[07:40] <arko> but tom is your escort
[07:41] <eroomde> sure
[07:41] <eroomde> given it's feb he said to just liase a bit nearer the time
[07:41] <arko> so he was cool with me joining you guys?
[07:41] <eroomde> as he's not exactly sure what his movements are for a precise day in feb this far out
[07:41] <eroomde> yep!
[07:41] <arko> yeah, its hard to predict
[07:41] <arko> no way
[07:41] <arko> woah
[07:41] <arko> i get to have lunch with one of my heros
[07:42] <arko> i've been to scared to say anything other than hi too him
[07:42] <arko> :P
[07:42] <arko> we spoke very breifly once
[07:43] <eroomde> he's an awesome guy
[07:43] <arko> this is going to be awesome
[07:43] <eroomde> still doing fundamentally cool engineering
[07:43] <arko> <3 tom and manning
[07:43] <eroomde> it's so easy to get promoted away from anything interesting
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[07:44] <arko> im shocked manning remembered me from the few times i talked to him
[07:44] <arko> i asked him for his job and he said ok
[07:44] <arko> :)
[07:44] <eroomde> i would so love to meet him
[07:44] <arko> days go by, still no job
[07:44] <arko> damn dude
[07:44] <eroomde> he's like a happy bear ambasador from the planet awesome
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[07:44] <arko> im stoked
[07:44] <arko> hahahaa
[07:44] <arko> yes
[07:45] <arko> i always see him as the Woz of space
[07:45] <eroomde> haha
[07:45] <eroomde> new phone arrives today
[07:45] <eroomde> i've had my trusty 3gs since i bought it for a project we did for esa
[07:45] <eroomde> to be an organised mobile person
[07:46] <eroomde> to replace my old dumb phone
[07:46] <eroomde> three years alter her battery has had it, she has no signal anywhere and is prone to random crashing
[07:46] <eroomde> and can't sustain voice calls for more that about 3 mins without browning out
[07:46] <eroomde> so, she goes
[07:46] <arko> nice
[07:46] <arko> whatcha get?
[07:46] <eroomde> and in comes a shiny sim-free galaxy s3
[07:46] <arko> nice!
[07:46] <eroomde> it would have been a nexus 4
[07:47] <arko> i have an sii
[07:47] <eroomde> but they are unobtainable atm
[07:47] <arko> they are great phones
[07:47] <arko> oh yeah, the nexus 4
[07:47] <eroomde> and the microsd and replaceable battery were both big selling points to me
[07:47] <eroomde> i'm not someone who changes their phone every year
[07:47] <arko> im waiting till it's available again, i love how you can unlock the LTE
[07:48] <eroomde> also as it's sim free i had a thought
[07:48] <arko> the nexus not having sd was annoying news, but still
[07:48] <eroomde> which you might be able to help with
[07:48] <eroomde> which is to buy a 1 month sim for the US
[07:48] <eroomde> in the uk you can buy quite good 1 month rolling sim deals
[07:48] <eroomde> eg in my case, $20/mo = unlimited data, 600 mins voice calls and 5000 texts
[07:49] <arko> wow
[07:49] <arko> thats nice
[07:49] <eroomde> if the same thing is available in the states, it might be worth me doing it
[07:49] <eroomde> especially for the data
[07:49] <eroomde> as i'm there like a whole moneth
[07:49] <eroomde> month*
[07:49] <arko> T-Mobile is your best bet for that
[07:49] <arko> yeah
[07:49] <eroomde> i thought it was 3 weeks
[07:49] <eroomde> then i worked out it was a month
[07:49] <arko> heh
[07:49] <eroomde> one of those errors casued by assuming months are exactly 4 weeks
[07:50] <eroomde> out on 21st, back on 16th
[07:50] <eroomde> 3 weeks
[07:50] <eroomde> alas no, it's 4 weekends
[07:50] <arko> btw, how much time are you going to have to kick it and check things out (jpl, spacex, our hackerspace, space shuttle, etc)
[07:50] <eroomde> sorry Mr Job
[07:50] <eroomde> well, ok rough iternary
[07:50] <eroomde> 4 weeks total
[07:50] <eroomde> 1 in nyc
[07:50] <eroomde> 1 in chicago
[07:50] <eroomde> train across country
[07:50] <eroomde> 2 in cal
[07:50] <eroomde> totaly flexible in cal
[07:50] <arko> awesome
[07:50] <eroomde> the really rough idea was like about 1 week in sf itself
[07:50] <eroomde> then rent a mustang
[07:51] <eroomde> and go driving around for another week
[07:51] <arko> mustang
[07:51] <arko> hahahaha
[07:51] <eroomde> eg pasedena
[07:51] <arko> it comes with jeans and a cigar
[07:51] <eroomde> but basically totally flexible
[07:51] <arko> and an american flag
[07:51] <eroomde> it better do!
[07:51] <arko> awesome
[07:51] <arko> i live in pasadena so i can show you the cool stuff
[07:51] <eroomde> yeah that would be awesome
[07:51] <arko> plus it's a 10 min drive to the hackerspace too
[07:52] <arko> 30mins till space shuttle
[07:52] <arko> 5 mins till jpl
[07:52] <arko> 1 min to my favorite coffee shop
[07:52] <eroomde> i would love to see a shuttle
[07:52] <eroomde> especially if there's an ssme
[07:52] <eroomde> so. many. questions.
[07:52] <arko> i wish they had the engineers around to ask questions
[07:53] <eroomde> yeah
[07:53] <eroomde> the MIT video just doesn't cut it
[07:53] <arko> too bad they have better things to do
[07:53] <eroomde> they never show the slides
[07:53] <arko> the MIT lectures are a bit dry too
[07:53] <eroomde> they ssme one was a bit
[07:53] <eroomde> he said um a lot
[07:53] <eroomde> and there wasn't much technical content
[07:53] <arko> ^
[07:53] <arko> that
[07:53] <arko> that drives me nuts
[07:54] <arko> i want the math
[07:54] <eroomde> eyepatch was cool tho
[07:54] <arko> the details
[07:54] <arko> lol yeah
[07:54] <eroomde> yeah totally
[07:54] <arko> the internal jpl lectures are the best
[07:54] <arko> they bring in people from internal and external
[07:54] <eroomde> i quite want to derive thermodynamics from f=ma and bayes rule
[07:54] <arko> and give detailed lectures
[07:54] <eroomde> i.e. get gibbs free energy from those two
[07:55] <eroomde> and so then get all the equations you need to predict combustion chamber performance
[07:55] <arko> i'd watch that
[07:55] <eroomde> so basically i can build a rocket engine from totally fundamentals
[07:55] <eroomde> no lookup tables about combustion propellent combos or anything
[07:55] <eroomde> just f=ma and bayes rule and probably an equation involving boltzmann
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[07:55] <arko> hmm
[07:55] <eroomde> you must be able to derive all the energetics from that lot
[07:56] <eroomde> ah fuck it's started raining
[07:56] <eroomde> fucking stop!
[07:56] <arko> dude
[07:56] <arko> come live in pasadena
[07:56] <arko> we have rain wednesday but thats the first time in weeks
[07:56] <arko> before that was months
[07:56] <eroomde> the rest of the week is rain free thank god, says forecast
[07:56] <eroomde> but the problem with flooding is we live on the main river
[07:56] <arko> but we dont have euro chocolates
[07:57] <arko> oh shit
[07:57] <eroomde> and it takes a day or 2 for all the rainfall to work its way through the basins and into the tributaries and to the river
[07:57] <eroomde> so even if it stops right now, we don't know we'll be safe
[07:57] <arko> how often do you get bad flooding?
[07:57] <eroomde> i'll bring you some euro chocolate
[07:57] <arko> PLEASE
[07:58] <eroomde> well, where i live now (oxford) flooded in 2007
[07:58] <eroomde> it's actually a hopeless place
[07:58] <eroomde> if you look on the map
[07:58] <arko> my girlfriend brought me a bag load of Milka and im planning the days in the months coming when to eat them
[07:58] <eroomde> it's built on a swamp
[07:58] <eroomde> between several rivers
[07:58] <arko> >_< doh
[07:58] <eroomde> thank god i'm only renting
[07:58] <eroomde> when i buy, there shall be some elevation
[07:58] <arko> haha
[07:58] <arko> mountains are cool
[07:58] <eroomde> we've moved everything upstrairs
[07:59] <eroomde> the downstairs looks like when we first rented
[07:59] <eroomde> spartan
[07:59] <eroomde> except the carpets need more of a clean
[07:59] <eroomde> we we shall def do given we've emptied it out
[07:59] <eroomde> this assuming no flood
[07:59] <eroomde> if flood, they'll need more than a clean
[07:59] <arko> oh i thought you were in Wescott
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[07:59] <eroomde> work is in westcott
[07:59] <eroomde> i live in oxford itself
[07:59] <arko> ah
[07:59] <eroomde> which in all other respects i really like
[08:00] <eroomde> it's a beautiful city
[08:00] <eroomde> westcott is like a tiny village and the business park
[08:00] <arko> heh, hard to tell whats far or not far when looking at foreign countries
[08:00] <eroomde> i'm a bit young to live somewhere like that
[08:00] <arko> :P
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[08:00] <eroomde> it's about a 30 min drive for me each morning
[08:00] <eroomde> which is ok
[08:00] <eroomde> i cycle it in summer
[08:01] <arko> heh
[08:01] <arko> i must have the wrong oxford or westcott
[08:02] <arko> google maps says 1.5 hours
[08:02] <Darkside> hmm
[08:02] <Darkside> having fun with sprintf here
[08:02] <Darkside> anyone here a sprintf guru?
[08:02] <arko> my favorite! (NOT)
[08:02] <arko> whats your issue?
[08:02] <Darkside> sprintf(topLine,"%05u.%03u KHz",kilohertz,hertz);
[08:02] <arko> getting intermittened garbage?
[08:02] <Darkside> well
[08:02] <Darkside> the second variable isnt being printed
[08:02] <Darkside> i just get zeros
[08:03] <Darkside> when the value contained in hertz (an unsigned int) is most definitely not zero
[08:03] <Darkside> i'll pastebin a bit more of the code
[08:03] <Darkside> so you understand what is going on
[08:03] <arko> kk
[08:03] <eroomde> arko: really?
[08:03] <eroomde> westcott in buckinghamshire?
[08:03] <arko> oh
[08:03] <arko> i was on surrey
[08:03] <arko> ok 39 mins
[08:04] <arko> makes more sense
[08:04] <eroomde> https://maps.google.co.uk/maps?q=from:+Oxford+OX20BB+to:+Westcott+Venture+Park,+Aylesbury&saddr=Oxford+OX20BB&daddr=Westcott+Venture+Park,+Aylesbury&hl=en&sll=52.8382,-2.327815&sspn=6.703969,15.930176&geocode=FdWjFQMdlJLs_ym9XZaCl8Z2SDGAQ_EhrtQivg%3BFaMXFwMd6Wrx_yG-9bxr4_BZeykTqosIAfB2SDG-9bxr4_BZew&oq=from:ox20bb+to:westcott&t=m&z=11
[08:04] <eroomde> i can cycle it in 1hr 10, is the silly thing
[08:04] <eroomde> a slightly different route mind, the main road is not a happy bike place
[08:04] <Darkside> http://slexy.org/view/s2ESsyn7ue
[08:04] <arko> omg so much green
[08:04] <Darkside> right
[08:04] <Darkside> there is my problem
[08:04] <eroomde> but it's a lot easier to get through oxford on a bike in the morning
[08:04] <eroomde> yeah we do green quite well here
[08:05] <Darkside> what have i screwed up
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[08:06] <eroomde> arko: so if you zoom into the airfield at westcott
[08:06] <eroomde> there's a triangle of runways
[08:06] <eroomde> we have those 4 concrete blobs just south of the bottom, NW/SE runway
[08:06] <eroomde> those are the test stands
[08:07] <eroomde> ael.co.uk banner pic is currently one of them
[08:14] <arko> holy crap!
[08:14] <arko> thats awesome!
[08:14] <arko> is this shared space?
[08:14] <arko> or all you guys?
[08:14] <arko> damn, i would fly to work
[08:15] <eroomde> thw whole airfield is now a shared space
[08:15] <eroomde> lots of businesses
[08:15] <eroomde> but 'J'-site
[08:15] <eroomde> our little bit down that little road with the tests statands, is ours
[08:15] <eroomde> sadly a lot has changed since that photo
[08:15] <arko> still
[08:16] <arko> thats a nice place to have
[08:16] <eroomde> one of the runways is full of solar panels
[08:16] <eroomde> there's a new central road running north-south through the site
[08:16] <eroomde> the other runway got dug up
[08:16] <eroomde> we share J-site with a hut belonging to surrey sattelites
[08:17] <eroomde> and a plumber called derek who has been with the site since 29BC
[08:17] <eroomde> and anything you need, you ask derek
[08:17] <eroomde> and 30 mins later it arrives on the back of his pickup
[08:17] <arko> hahaha
[08:17] <eroomde> but he's super useful to have around
[08:17] <eroomde> he maintains all the drencher systems we have
[08:17] <arko> no kidding
[08:18] <arko> sounds like a good person
[08:18] <eroomde> where we can flood the test bayes with water if fans and excrement collide
[08:18] <eroomde> test bays*
[08:18] <eroomde> freudian slip
[08:18] <arko> Darkside: try without the "%05u."
[08:18] <arko> what do you get?
[08:18] <arko> BAYES
[08:19] <arko> "accidental" sure pal
[08:19] <Darkside> arko: you mean with jut the one input?
[08:19] <arko> im jealous man, thats a cool place to work
[08:19] <arko> yeah
[08:19] <eroomde> it's quite fun
[08:19] <eroomde> we described it yesterday as being like a smaller and wetter mojave
[08:19] <arko> see where the value goes sour
[08:19] <Darkside> sprintf(topLine,"%03d KHz",hertz);
[08:20] <Darkside> that gives 050 KHz
[08:20] <arko> mojave sucks
[08:20] <eroomde> but it has what i imagine is a similar feel. there are now 5 small private space companies on site
[08:20] <eroomde> there's a little bit of a buzz
[08:20] <eroomde> lots of new work constantly and interesting people dropping in for coffee
[08:20] <arko> Darkside: unsigned int hertz = (unsigned int)(current_freq%1000); that line worries me a bit
[08:20] <eroomde> incidently, good coffee = good business
[08:20] <arko> haven't looked at it much though
[08:20] <eroomde> people come out of their way to stop by
[08:20] <Darkside> arko: hertz contains the right value
[08:20] <arko> ok
[08:20] <Darkside> i've checked that by printing it out a serial debug port
[08:21] <Darkside> both variabls contain the correct value, sprintf i what is fucking up
[08:21] <arko> i have ALWAYS
[08:21] <arko> had bad experience with sprintf over serial
[08:21] <arko> just serial.write that
[08:22] <Darkside> i did
[08:22] <arko> eroomde: good coffee and im there
[08:22] <Darkside> oh
[08:22] <arko> you and one other person are the only people i know out that way, so im definitly stopping by for that
[08:22] <eroomde> it's good at ael!
[08:22] <Darkside> arko: well, Serial.println(hertz) prints 50 down serial
[08:22] <eroomde> we buy a specific brazillian one green
[08:22] <eroomde> and roast and grind in the office
[08:23] <arko> what
[08:23] <arko> you have a coffee roaster!?
[08:23] <eroomde> yep
[08:23] <eroomde> 2 infact
[08:23] <eroomde> coffee is taken v seriously, as i say :)
[08:23] <arko> nice!
[08:23] <arko> the coffee house i go to here has one too
[08:23] <arko> it makes all the difference when its fresh
[08:23] <eroomde> i was at cam with some serious coffee nerds
[08:24] <arko> unlike starbucks and stuff
[08:24] <eroomde> it rubbed off
[08:24] <arko> coffee is fuel
[08:24] <arko> Darkside: let me get my c++ sandbox booted
[08:24] <arko> now you have me thinking
[08:24] <arko> :P
[08:25] <eroomde> right gonna hit work
[08:25] <eroomde> ttyl
[08:25] <arko> later!
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[08:31] <arko> Darkside: try printf
[08:31] <Darkside> how does printf work on an avr?
[08:31] <Darkside> it wouldn't work
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[08:35] <fsphil> printf can be redirected to serial
[08:35] <fsphil> well, you write a handler for stdout
[08:36] <fsphil> I through together a hacky one to output over rtty
[08:36] <arko> i used sprintf once..
[08:36] <arko> ONCE
[08:36] <arko> when went to serial.write
[08:38] <fsphil> snprintf is handy
[08:38] <fsphil> unless floats are involved
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[08:42] <arko> Darkside: that code works in C++
[08:42] <Darkside> arko:
[08:42] <Darkside> sprintf(topLine,"%05u.",kilohertz);
[08:42] <Darkside> sprintf(topLine+6,"%03uKHz",hertz);
[08:42] <Darkside> that works
[08:43] <arko> hmm
[08:43] <arko> odd
[08:43] <Darkside> so the avr-gcc stdlib is shit
[08:43] <arko> im getting 07100.050
[08:43] <arko> yeah
[08:43] <arko> pretty much
[08:43] <arko> ditch sprintf when possible
[08:43] <Darkside> heh
[08:43] <arko> it's very ugly to begin with
[08:43] <arko> even without avr touching it
[08:44] <arko> sprintf_s might help
[08:44] <arko> try that
[08:44] <arko> if avr has that
[08:45] <Darkside> it doesnt
[08:45] <Darkside> its using avr-gcc 4.3.2
[08:45] <arko> lame
[08:45] <arko> btw, whats your buffer size?
[08:45] <arko> topLine
[08:45] <Darkside> 17
[08:45] <arko> ok
[08:45] <arko> jw
[08:46] <arko> btw, did you get pictures from your HAB?
[08:48] <Darkside> er
[08:48] <Darkside> not this one
[08:48] <arko> aww
[08:48] <arko> its cool
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[09:00] <fsphil> you had problems Darkside?
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[09:14] <eroomde> at work now
[09:14] <eroomde> lots of nearby streets are properly flooded
[09:14] <eroomde> we're still ok thankfully
[09:14] <eroomde> but i don;t know for how long
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[09:19] <nick_> eroomde: where abouts is the flooding?
[09:20] <eroomde> the sidestreets down biotley road
[09:20] <eroomde> osney island still ok
[09:21] <nick_> Looks like my bus route is effected
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[09:21] <eroomde> http://i.imgur.com/nQtE9.jpg
[09:21] <eroomde> this is along the canal by us
[09:22] <eroomde> water level is about 7cm beneath the top of the normal bank
[09:22] <LazyLeopard> Uh oh... Hope it stays below the line...
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[09:23] <nick_> Sounds like the east side of Kidlington is flooded
[09:23] <nick_> The river side, not the canal side
[09:24] <eroomde> yeah the river sides seem worse affected
[09:24] <eroomde> at least canals are a modicum more regulatable
[09:24] <eroomde> although, only up to a point
[09:24] <eroomde> once all the lochs are open anyway they are just rivers
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[09:26] <nick_> I didn't know the river was so close to the East
[09:26] <eroomde> why would you build a city on a swamp
[09:27] Nick change: cosmo_ -> cos-
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[09:28] <nick_> Because it's the last place where the ox can get over the river!
[09:31] <eroomde> it all makes sense
[09:31] <gonzo__> morning peeps.
[09:31] <nick_> oof
[09:31] <nick_> Abingdon road is under a foot of water in places
[09:32] <gonzo__> what's the combined wisdom in here on fouil balloons and H2 ?
[09:32] <gonzo__> foil
[09:32] <nick_> Damn the weather's strategic genius.
[09:32] <eroomde> fine
[09:32] <eroomde> foil balloons = static unlikely to build up
[09:33] <gonzo__> good. Thought that was the case.
[09:33] <gonzo__> Didn't know if the H2 would leak through the mylar
[09:33] <eroomde> it probably does
[09:33] <eroomde> it leaks through anything
[09:33] <eroomde> even metal
[09:34] <eroomde> but, you just have to put up with it
[09:34] <gonzo__> that is true
[09:35] <gonzo__> any ideas if it would leak quick enough to make a float unfeasable?
[09:35] <eroomde> [07:52am]: Dry Lane in Crawley, north of Witney, is closed due to flooding
[09:35] <eroomde> lol at flood alert
[09:35] <cm13g09> eroomde: that's reverse nominative determinism
[09:36] <eroomde> i'm not sure your username could determine anything
[09:36] <cm13g09> eroomde: I was talking more about that flood warning
[09:37] <eroomde> i know
[09:37] <cm13g09> I take it you've heard of nominative determinism, right?
[09:37] <eroomde> yes
[09:38] <cm13g09> ok - good - just checking
[09:38] <eroomde> it was a thing in the back of newscientist for a while
[09:38] <cm13g09> ah right
[09:38] <cm13g09> it's also a thing with BBC's Your Letters
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[09:42] <eroomde> nick_: which bit of oxford is the highest?
[09:42] <eroomde> i guess near headington hill
[09:44] <fsphil> must be bad when you're asking that
[09:46] <eroomde> yeah
[09:46] <eroomde> well, i want to buy soon
[09:46] <eroomde> and i don;t want to flood
[09:46] <fsphil> ah
[09:46] <eroomde> "The Environment Agency duty officer advises that the three local streams in the Hinksey area are starting to stabilise and the levels in the tributaries north of Oxford are starting to fall."
[09:46] <eroomde> this is good
[09:47] <eroomde> we're literally cm from our house flooding
[09:47] <eroomde> you can see the drain in our back garden is about 5cm from overflowing out the top
[09:52] <SpeedEvil> eroomde: good luck.
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[10:03] <eroomde> SpeedEvil: thanks
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[11:35] <griffonbot> Received email: Steve Aerospace "[UKHAS] Hwoyee 1600g early burst."
[11:35] <john__> hello
[11:36] <jonsowman> hi
[11:36] <daveake> ooer freebies
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[11:37] <eroomde> ok so this is cool
[11:37] <eroomde> i bought a galaxy s3 phone
[11:37] <eroomde> and dropbox have given me free 48GB
[11:37] <eroomde> 48GB
[11:37] <eroomde> .
[11:37] <daveake> nice
[11:37] <UpuWork> now just send the phone back
[11:37] <UpuWork> get an iPhone , keep the space
[11:37] <eroomde> i want the phone :)
[11:37] <daveake> Cheaper than buying the space from dropbox
[11:37] <UpuWork> double bonus
[11:37] <eroomde> it's a deliberate choice over the iphone 5
[11:37] <eroomde> after some ruminating
[11:38] <UpuWork> my engineers all got phones, sent them back pocketed space
[11:38] <jonsowman> eroomde: what made you decide on the samsung rather than the iphone?
[11:38] <daveake> I'm up to 10GB with referrals, most of which are to myself :)
[11:38] <eroomde> android mostly
[11:38] <eroomde> maps specifically
[11:38] <jonsowman> heh, oh yes
[11:38] <john__> i wanted some help linking my ntx2 to send some data to my rtl dongle (1,0), i started by building the e.g. circuit given by ukhas, and set up my sdr receiver
[11:38] <eroomde> micro sd card also (so a microsd to flickr bridge device - useful for cameras)
[11:38] <jonsowman> 14GB at the moment due to uni space race thing
[11:39] <eroomde> and android just letting you do things a bit more
[11:39] <eroomde> too much with ios recently i've come up with a sensible solution to a problem
[11:39] <jonsowman> I'm going to have to make this choice in a few months
[11:39] <eroomde> but that isn;t actually possible for whatever seemingly arbitrary ios restriction
[11:39] <daveake> I've installed dropbox at a few client sites, to help with transfers/backups/etc., and I just set up a new email this-customer@mydomain each time
[11:40] <eroomde> i like having a bit of a filesystem and having an sftp client so i can just scp files to other servers
[11:40] <eroomde> like at work
[11:40] <jonsowman> yeah
[11:40] <jonsowman> true
[11:40] <eroomde> take a photo of something in the bay, put it on the server straight away
[11:40] <eroomde> also, fm radio
[11:40] <eroomde> good for me, i like radio 4
[11:40] <jonsowman> I have mine automatically upload camera pics to dropbox
[11:40] <jonsowman> which is v handy
[11:41] <daveake> I need to upgrade. I have a htc desire and it runs out of memory if I install anything new
[11:41] <eroomde> also there's an androind eagle file viewer now
[11:41] <eroomde> <3
[11:42] <jonsowman> oh yes I saw that
[11:42] <jonsowman> handy
[11:42] <eroomde> just downloaing it now
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[11:48] <john__> if you test the ntx2 using the blinking code, what do you connect to the pin 13
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[11:53] <craag> john__: You want to connect the 3 resistors between the arduino and ntx2 as per the guide.
[11:54] <craag> That'll set the voltage shift right for the NTX2 input.
[11:56] <john__> do you connect to a vcc 5v
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[11:57] <craag> Yes, one of the resistors connects to 5v.
[11:58] <craag> (If your arduino is a 5V arduino)
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[12:28] <griffonbot> Received email: Steve Aerospace "Re: [UKHAS] Hwoyee 1600g early burst."
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[13:03] <griffonbot> Received email: "Re: [UKHAS] Hwoyee 1600g early burst."
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[13:04] <daveake> Might be a lot of 1600s going up next spring :p
[13:09] <DrLuke> lol
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[14:21] <Laurenceb> http://www.theregister.co.uk/2012/11/27/feature_raspberry_pi_in_schools/page3.html
[14:21] <Laurenceb> those guys look familiar
[14:23] <eroomde> not sure how they got past the crb
[14:23] <UpuWork> I didn't
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[14:23] <daveake> "science"? :p
[14:23] <UpuWork> I turned up with my "Jim Fixed it for me" badge and they turned me away
[14:24] <daveake> s/Fixed/F**ed/
[14:24] <UpuWork> lol
[14:24] <UpuWork> insert milking a cow joke here
[14:24] <daveake> :)
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[14:35] <Laurenceb> http://www.meta-cortex.com/jim%27ll-fix-it-retro-t-shirt
[14:35] <Laurenceb> you could wear that
[14:36] <daveake> http://www.ebay.co.uk/itm/JIMMY-SAVILLE-T-SHIRT-HOODY-FUNNY-HUMOR-STAG-HEN-TEE-/251183930757?pt=UK_Men_s_T_Shirts&var=550196687355&hash=item3a7bba9d85
[14:38] <Laurenceb> http://www.dailymail.co.uk/news/article-2215650/Gary-Glitter-t-shirt-Jim-Fixed-It-For-Me-badge-attached-condemned-NSPCC-appears-sale-eBay.html
[14:38] <Laurenceb> successful troll is successful
[14:40] <NavracWork> they found jimmy savilles diary recently - but the last entry was 12 years old
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[15:12] <eroomde> all, perhaps have a wee listen to the today programme, tomorrow (irony) at about 7.20
[15:15] <kokey> I listen to the best of today podcasts almost every day
[15:16] <kokey> except lately not as much since the ios 6 podcast app is a huge POS
[15:17] <kokey> it seems to think if there is a podcast with the same name as another podcast it's the same
[15:18] <kokey> which doesn't help with the business news which is called the same every day
[15:18] <eroomde> love computers
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[15:23] <fsphil> this is just bad programming that
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[15:26] <kokey> apple is going the way of the nokia since steve jobs died
[15:28] <eroomde> hence why i abandoned i-stuff as of yesterday
[15:28] <eroomde> and have a shiny s3 on my desk
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[15:38] <griffonbot> Received email: Anthony Stirk "[UKHAS] Launches 30/11 & 1/12"
[15:40] <kokey> yeah though I'll wait a while
[15:41] <kokey> hearing people being impressed with some of their data being retained between android upgrades I sense it has some way to go
[15:43] <BrainDamage> here the 2.3 -> 4 upgrade kept most of my data, the only thing being reset to factory default was the homescreen widgets
[15:43] <BrainDamage> which I consider an acceptable burden
[15:43] <BrainDamage> galaxy s2
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[15:53] <fsphil> I like my old htc wildfire, but it's getting pretty outdated now
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[15:55] <kokey> also the phones are a bit big, but I guess there are narrower models
[15:55] <kokey> I quite like being able to use my iphone 4 with one hand
[15:56] <BrainDamage> the main reason why I picked s2 instead of others is that size is still ok, but it's already a bit bigger than I wanted
[15:56] <BrainDamage> s3 is even larger :/
[15:56] <mfa298> kokey: the benefit of android is that one size doesn't fit all meaning there's lots of choice out there of different specs and sizes.
[15:57] <mfa298> although surely the main benefit of android is the chase car app (bringing this somewhere near on topic :p )
[15:59] <mfa298> I've liked the htc range of phones although that can mean the updates are further behind as you have to wait for htc to add their bits before the network can sit on the update for a few months.
[16:02] <kokey> it was nice when apple was good
[16:02] <kokey> like when nokia was good
[16:03] <kokey> you get the phone, it works well for the important stuff, and you don't have to worry about it
[16:03] <kokey> I got a nokia communicator in 2006 which I only replaced with an iphone in 2010
[16:04] <kokey> same with my macbook, it just worked really well, no fiddling required
[16:04] <fsphil> I'd still be using my old nokia but the screen broke
[16:04] <kokey> if I want to hack something there's always an arduino out there or something
[16:05] <kokey> I really don't want hassle with my phone or laptop really
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[16:32] <MiniMail> Does anyone know a repeater software for linux?
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[16:50] <pthomas> hello
[16:50] <pthomas> does anybody know a good model of gps for a weather balloon?
[16:50] <eroomde> ublox 6
[16:50] <eroomde> any of the models in that range
[16:50] <eroomde> max6 is popular
[16:51] <pthomas> ok thanks
[16:51] <eroomde> you need to put it into an airborne mode, which will allow it to work at altitude
[16:51] <eroomde> you do this via the serial link
[16:51] <pthomas> ok
[16:51] <eroomde> more info on the ukhas wiki and the device's datasheet(s)
[16:51] <pthomas> i have never done anything like this and I am just doing it with my high school
[16:52] <pthomas> we are planning to use arduino or rasberry pi to control them. any suggestions?
[16:52] <eroomde> arduino
[16:52] <eroomde> not raspberry pi
[16:52] <eroomde> raspberry pi's take about 4000x more power than is required to do the job
[16:53] <eroomde> and they get hot
[16:53] <eroomde> and they're more complicated to use
[16:53] <UpuWork> and the SD cards fall out
[16:53] <eroomde> behold the voice of experience
[16:53] <UpuWork> jsut relaying what I heard on the internet once
[16:53] <pthomas> would it be possible/work well if we had rasberry pi controlling seperate functions, for example, a rasbery pi to control gps, one to control camera, and arduino to control both of them
[16:54] <pthomas> so u think arduino would be enough?
[16:54] <eroomde> it would be possible
[16:54] <eroomde> it would not work well
[16:54] <UpuWork> it would but I would strongly recommend you keep it simple
[16:54] <pthomas> what would work better?
[16:54] <eroomde> arduino
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[16:54] <UpuWork> and the Arduino is more than capable of doing all that
[16:54] <pthomas> but arduino can handle all that right?
[16:54] <UpuWork> and due to the real time nature of the Arduino its actually easier
[16:54] <eroomde> to use a raspberry pi to control a gps is like mobalising a tank battalion to take you to the corner shop to buy milk
[16:55] <pthomas> lol ok thanks
[16:55] <eroomde> and yep, the arduino is plenty powerful enough
[16:55] <eroomde> you'll be fine
[16:56] <pthomas> ok
[16:56] <pthomas> thanks that helps a lot
[16:56] <UpuWork> We've used (derivatives anyway of the) Arduino to send back live images, control GPS , pressure, temp etc
[16:56] <pthomas> any specific arduino board that you used?
[16:56] <UpuWork> Any really the Uno is popular
[16:56] <pthomas> ok
[16:56] <UpuWork> however the GPS modules work at 3.3V
[16:56] <UpuWork> the Uno works at 5V
[16:57] <UpuWork> but you can get a GPS with built in level convertors
[16:57] <UpuWork> the NTX2 radios work at 5V
[16:57] <daveake> UpuWork Where could such a thing be purchased?
[16:57] <pthomas> got to go, thanks though
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[16:57] <daveake> too late :(
[16:57] <UpuWork> well thanks for asking daveake
[16:57] <UpuWork> lol
[16:58] <UpuWork> amusingly the commentards on the reg though all the pads on the Lohan board had vias in them
[16:58] <UpuWork> http://www.theregister.co.uk/2012/11/19/lohan_spears/
[16:58] <UpuWork> see the image
[16:58] <UpuWork> they are just the scanner picking up the slight ridges in the solder
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[16:59] <daveake> "CommenTards" someone called them :)
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[17:01] <UpuWork> right off
[17:04] <eroomde> various roads near home are now closed
[17:05] <eroomde> including the one at the junction i come in on
[17:05] <eroomde> might be a night in the office at this rate
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[17:06] <jonsowman> eroomde: flooding?
[17:06] <eroomde> yep
[17:06] <jonsowman> not even raining here
[17:06] <eroomde> right in the eye of it where i live
[17:06] <eroomde> on osney island
[17:06] <fsphil> they seemed hopeful it was getting better on the news earlier
[17:06] <DrLuke> sucks :(
[17:06] <eroomde> the rain has stopped
[17:06] <DrLuke> I hope your home stays dry
[17:07] <eroomde> but it takes 2-3 days for all the rainfall to work itsway into the river system
[17:07] <jonsowman> yeah
[17:07] <nick_> I bet my previous house is flooded
[17:07] <eroomde> and we're right by the river
[17:07] <eroomde> here is a pic
[17:07] <nick_> Just down the road from Hinksey school
[17:08] <eroomde> https://twitter.com/SimonO19/status/273450163010428930/photo/1
[17:08] <fsphil> eep
[17:08] <eroomde> it is really fast moving too
[17:08] <eroomde> this is right by our house
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[17:09] <mattbrejza> your stuff upstairs, sandbags at the door, pumps ready to go?
[17:09] <eroomde> yep everything's upsairs
[17:10] <eroomde> and they've got 60kW deisel pumps on the streets
[17:10] <fsphil> where do they pump it too?
[17:10] <mattbrejza> suppose those barriers arnt the most water tight
[17:10] <eroomde> away from the houses, supposedly
[17:10] <eroomde> but yeah good question
[17:10] <fsphil> -o
[17:10] <eroomde> same bit of river from road bridge
[17:10] <eroomde> https://twitter.com/Andrewsccll/status/273435470518689792/photo/1
[17:10] <fsphil> I guess it's most useful when the levels of the river drop
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[17:15] <DrLuke> I suppose that wall isn't part of the river?
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[17:19] <griffonbot> Received email: Steve Aerospace "Re: [UKHAS] Hwoyee 1600g early burst."
[17:23] <arko> ahhh
[17:24] <arko> good morning
[17:24] <eroomde> good evening
[17:24] <arko> hey! your still alive!
[17:24] <eroomde> i'm at work
[17:24] <eroomde> work is safe
[17:24] <eroomde> work is high
[17:24] <arko> heh
[17:25] <eroomde> oxford i'm not so sure about
[17:25] <arko> yeah those pictures dont look fun
[17:25] <arko> heh
[17:25] <eroomde> awaiting to hear how housemate finds the journey home
[17:25] <eroomde> https://www.facebook.com/photo.php?pid=1158119&l=a52b69816b&id=111085648940449
[17:25] <eroomde> this is thisafternoon
[17:25] <eroomde> our house is one of those on that little patch on the right
[17:26] <SpeedEvil> rising damp.
[17:26] <eroomde> renting
[17:26] <arko> wait, if thats the initial flooding...
[17:27] <arko> what about the rest that comes later?
[17:27] <eroomde> it's actually flooded further down the road
[17:27] <eroomde> we're lucky that we're like 1m higher
[17:27] <eroomde> well hopefully the bit that comes later is less than the height of that barrier
[17:27] <eroomde> but it can still come up through drains and so on
[17:27] <SpeedEvil> is that just a row of sandbags witrh some tarp over it?
[17:28] <eroomde> although they have pumps to force drains into te river
[17:28] <eroomde> and not the other way round
[17:28] <eroomde> it's a little mtal wall
[17:28] <eroomde> about 50cm high
[17:28] <SpeedEvil> ah
[17:28] <bertrik> where is this?
[17:28] <eroomde> oxford
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[17:32] <griffonbot> Received email: William Dover "[UKHAS] Re: Launches 30/11 & 1/12"
[17:40] <griffonbot> Received email: Steve Aerospace "Re: [UKHAS] BOC Helium Regulator - product recall"
[17:43] <griffonbot> Received email: David Akerman "Re: [UKHAS] BOC Helium Regulator - product recall"
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[17:53] <griffonbot> Received email: Steve Aerospace "Re: [UKHAS] BOC Helium Regulator - product recall"
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[17:56] <pthomas> hey does anyone know the url to the habhub simulator?
[17:57] <Randomskk> http://habhub.org/predict ?
[17:57] <eroomde> pthomas: i encourage you to have a read of the wiki
[17:57] <pthomas> yeah thanls
[17:57] <eroomde> it has answers to lots of this info
[17:57] <pthomas> *thanks
[17:57] <eroomde> like gps units
[17:57] <eroomde> and where to find tools
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[18:09] <kokey> I better do a fat Upu order before I move to SA
[18:10] <daveake> Is that thin Upu's brother?
[18:19] <kokey> haha
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[18:52] <Upu> I can post to SA :)
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[19:06] <G7PMO_Kev> Dave / Anthony UPU are you here at all?
[19:07] <Upu> I'm here
[19:08] <G7PMO_Kev> Hey, I was looking to Launch on Saturday too and one of my trackers has to be on 434.075Mhz. If I get up early and launch at sunrise, I should be done by the time your ready to launch? Would that be ok?
[19:09] <Upu> is it bang on 075 ?
[19:09] <G7PMO_Kev> 2 secs
[19:11] <G7PMO_Kev> no, 072, 073, got to 074 in the freezer with no insulation
[19:11] <Upu> what time are you launching ?
[19:11] <G7PMO_Kev> 7.30 / 7.45?
[19:11] <Upu> 2 hour flight ?
[19:12] <Upu> I'm more concerned about your payload as we have multiple trackers on ours
[19:12] <Upu> it shouldn't be an issue
[19:12] <G7PMO_Kev> predictor says 75 mins to burst
[19:12] <Upu> and its likely we won't be going up till 10m
[19:12] <G7PMO_Kev> launching at 10, or preparing at 10?
[19:12] <Upu> ok but PM me your phone number so we can coordinate
[19:14] <G7PMO_Kev> I will have 2 trackers on mine, one ntx (073 and one RFM22b) - which I shall move from .200 :)
[19:14] <Upu> well .200 might be ok
[19:14] <Upu> mine is on 225 now
[19:14] <Upu> put it on 175 to be sure
[19:16] <G7PMO_Kev> the early flight gives me a nicer route - across to ely rather than down to London :)
[19:16] <Upu> yeah the london thing is err bad :)
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[19:24] <Upu> ping jdtanner1
[19:25] Action: G7PMO_Kev hands UPU a /
[19:25] <Upu> no it was the right on :)
[19:25] <Upu> one
[19:26] <G7PMO_Kev> :)
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[19:44] <griffonbot> Received email: Kevin Walton "[UKHAS] Launch, Saturday 07:45 (sunrise), 1st December"
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[20:23] <Lunar_Lander> hello
[20:27] <G7PMO_Kev> hey Lunar
[20:34] <number10> G7PMO_Kev: thats going to be darkish when you set up for your launch on saturday
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[20:35] <jdtanner> Pitch black more like ;)
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[20:40] <griffonbot> Received email: Marco (projectBLAST) "[UKHAS] Launch Announcement: University of Southampton Project BLAST
[20:40] <fsphil> uhoh
[20:42] <mattbrejza> it is my understanding this one has an apex alpha board on it for backup
[20:42] <fsphil> ah
[20:42] <mattbrejza> that wont solve the issue of a cutdown firing at 11km but never mind
[20:42] <fsphil> wasn't that only one of several issues?
[20:43] <daveake> There was the r<just a mo while I multitask>tty issue
[20:43] <mattbrejza> well thats what happens when you give mech/air engineers electronics projects
[20:44] <mattbrejza> well the alpha board will help with rtty issues as far as getting it back for the next launch goes
[20:44] <daveake> indeed
[20:45] <Lunar_Lander> btw I today tried out soldering on perfboard instead of veroboard
[20:45] <Lunar_Lander> was straightforward
[20:45] <fsphil> hopefully they've been working on it. it would be strange to launch something that they know doesn't work well
[20:45] <mattbrejza> well deadlines mess with that theory
[20:45] <fsphil> Lunar_Lander: are they not the same thing?
[20:46] <fsphil> oh wait, one has connected columns and the other hsan't
[20:46] <Lunar_Lander> perfboard has those holes with copper lining, veroboard has strips connecting lines
[20:46] <Lunar_Lander> yea
[20:46] <fsphil> yea I bought perfboard by mistake once
[20:46] <mattbrejza> tri-pad is quite nice also
[20:46] <daveake> I prefer that generally
[20:46] <Lunar_Lander> we installed a quick 3.3V power supply with a STSP switch and actually got the batteries to get hot
[20:46] <Lunar_Lander> fortunately I was with one of my team mates and we found out what was shorted
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[20:47] <daveake> eek
[20:47] <Lunar_Lander> yea
[20:47] <Lunar_Lander> can alkaline batteries detonate somehow?
[20:47] <Dan-K2VOL> if you power them in reverse, they might
[20:47] <daveake> Hey Dan. re the Rockblock antenna ... that sig strength of 2 I got indoors was a one-off!
[20:47] <SpeedEvil> they can burst
[20:47] <Dan-K2VOL> hi dave
[20:47] <fsphil> anything will if heated quicky
[20:47] <Lunar_Lander> ohh
[20:48] <Dan-K2VOL> heh daveake
[20:48] <SpeedEvil> detonate has a technical meaning, which would mean no
[20:48] <Dan-K2VOL> good to know
[20:48] <Lunar_Lander> then I am happy that I didn't get hurt
[20:48] <daveake> It mostly has a connection when poked almost out of an open window
[20:48] <SpeedEvil> (shockwave propagates super son anally)
[20:48] <SpeedEvil> supersonically
[20:49] <number10> if you add C3H5N3O9
[20:49] <fsphil> ah I didn't know that
[20:49] <Dan-K2VOL> if you're interested, the view of the fast-moving iridium satellite constellation is directly related to your sig strength
[20:49] <SpeedEvil> number10: cheddar?
[20:49] <daveake> ta
[20:50] <Dan-K2VOL> the iOS app called GoSatWatch is perfect for viewing your sky view of iridium sats with just a few taps
[20:50] <Laurenceb_> SpeedEvil: in b4 spacex
[20:50] <daveake> Oh I'll check that
[20:50] <daveake> I built a tracker with the rockblock iridium, plus NTX2 and a ublox, all on an Arduino Mega shield
[20:50] <number10> SpeedEvil: thats strong for cheddar
[20:50] <daveake> Had both on spacenear yesterday, working fine.
[20:51] <fsphil> how's the rockblock going?
[20:51] <daveake> Didn't you see my testing? :)
[20:51] <daveake> I have a python web server script to receive the messages and pass them on to Habitat
[20:51] <fsphil> possibly, but my brain isn't working :)
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[20:52] <daveake> Well, not quite finished, but it is working
[20:52] <daveake> Aiming to fly it on Saturday
[20:52] <fsphil> ah brilliant
[20:52] <Dan-K2VOL> nice daveake! great to hear
[20:52] <fsphil> satellite makes a whole lot of things possible
[20:53] <Dan-K2VOL> it's wonderful
[20:53] <daveake> uplink for a start
[20:53] <Dan-K2VOL> daveake how's the code going?
[20:53] <daveake> Though I probably won't do that for sat
[20:53] <daveake> Just need to do a little state machine to control the message sending
[20:54] <Dan-K2VOL> good luck, that was a real headache for us
[20:54] <daveake> The message it sends is just a normal rtty-style $$.... message, with just basic telemetry
[20:55] <daveake> ok, well I've written it up as pseudo code just need to go do i for real :)
[20:55] <daveake> it
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[20:56] <daveake> All the python script does is get the message from a URL POST that the Rock system does, converts from hex to ascii, then uses the Habitat library to poke the data into the couchdb database
[20:56] <daveake> not many lines of code at all
[20:57] <fsphil> python's great for that type of program
[20:57] <daveake> my first :)
[20:57] <daveake> it was an obvious candidate and a good excuse to start learning it
[21:00] <DanielRichman> daveake: once you've finished that we'd be more than happy to host the script on kraken
[21:01] <DanielRichman> it sounds like it doesn't need your rock password or whatever; just accepts a POST?
[21:01] <daveake> Yes, Upu keeps reminding me to speak to you about that :)
[21:01] <daveake> Yes
[21:01] <DanielRichman> cool
[21:02] <daveake> In the Rock 7 system you can set up a number of "destinations", each of which is a URL for the POST, or an email address
[21:02] <DanielRichman> that feature sounds too useful to be true
[21:02] <daveake> The POST has a few values - long/lat from the Iridium system etc., and the message itself in hex
[21:03] <daveake> If the POST doesn't get a 200 response it retries, waiting (IIRC) 1 minute before trying again, then 2 mins .... till after 14 attempts it gives up
[21:04] <daveake> It comes through very quickly after the message gets sent
[21:05] <daveake> Initially I had the script running from Apache via CGI, but now it includes its own web server.
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[21:57] <New2Balloon> Anyone answer an RTTY question? Space / Mark ???
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[21:58] <daveake> go on
[22:00] <New2Balloon> thanks.. In my continued learning I used the code on UKhas with the nTX2, then someone gave me some new code to fiddle with..
[22:00] <daveake> ok
[22:00] <New2Balloon> The ukhas code uses one pin to deliver to the ntx2
[22:00] <New2Balloon> the new code uses two, I guess Mark and Space?
[22:01] <daveake> Yeah, this has been discussed recently :)
[22:01] <New2Balloon> ooooooh?
[22:01] <New2Balloon> Im guessign the circuit on surrounding the ntx2 is different/
[22:01] <daveake> All you need to do is switch the voltage at the NTX2 between 2 levels - a lower one (space) for 0, and a higher one (mark) for 1
[22:02] <daveake> And the simplest method of doing that is the one-pin one
[22:02] <New2Balloon> one pin one?
[22:02] <New2Balloon> go on.. please
[22:02] <daveake> So the cpu pin goes high for a mark and low for a space
[22:03] <daveake> and to send a complete byte you send the start bit then 7/8 data bits then the stop bit(s)
[22:03] <daveake> The 2-pin version you have 2 outputs, and for a space you send one high and the other low; for a mark you do the opposite
[22:03] <New2Balloon> would a link to the code help... it would help me :D
[22:04] <daveake> But it uses an extra output and extra code so it's more complicated for no advantage
[22:04] <daveake> http://ukhas.org.uk/guides:linkingarduinotontx2
[22:05] <New2Balloon> in which case it's a coding question... then
[22:05] <New2Balloon> got that one working fine... my issue came with integration of a GPS string
[22:05] <New2Balloon> got given this to work with pastebin.com/YJGBGag0
[22:06] <New2Balloon> sorry.. http://www.pastebin.com/YJGBGag0
[22:06] <daveake> Well if you can send a byte then you can send strings
[22:06] <daveake> So you understand what's going on, see http://www.cs.nyu.edu/artg/telecom/fall99/lecture_notes/chap04/f4_2c.gif
[22:07] <daveake> It's for RS232 but it's the same thing logically
[22:07] <fsphil> that code is for the two-pin method
[22:07] <New2Balloon> OK, thanks, get the 232 (1,0) thing and managed to send the string..
[22:07] <fsphil> although it should work fine, but it might be reversed depending on the pin you've got wired to the ntx2
[22:08] <New2Balloon> fsphil, two pin NTX2?
[22:08] <fsphil> nah, same ntx2. but the old method used two pins to drive it
[22:08] <New2Balloon> oh I see
[22:08] <daveake> "got given this to work with" ... don't do that. Write your own.
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[22:08] <fsphil> +1
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[22:09] <New2Balloon> don't disagree but.. I'm practicalm and learning comes easier with trial and error... remove, change, improve.
[22:10] <New2Balloon> I completely agree though, no issues if I'd worked it out myself..
[22:10] <fsphil> I'd break it down, start with the basic
[22:10] <fsphil> see if you can switch between the two tones
[22:11] <fsphil> basically the "blink" program
[22:11] <daveake> Do the 2 tones, then do sending a byte, then do sending a string.
[22:12] <daveake> Then you can work on the GPS: Get and echo characters, then get a complete line at a time, then parse it
[22:12] <New2Balloon> OK, I've got the two tones. and a string and in fact two strings... I think that was an accident... :D
[22:12] <daveake> Then you're nearly done
[22:12] <jdtanner> (very wise words from daveake)
[22:12] <jdtanner> (as always :) )
[22:12] <Lunar_Lander> xD
[22:12] <Lunar_Lander> and I repeat, watch your electrics
[22:13] <Lunar_Lander> because today our batteries were almost ON FIRE
[22:13] <New2Balloon> GPS working too..
[22:13] <fsphil> you almost broke rule 0 Lunar_Lander
[22:13] <Lunar_Lander> which one?
[22:13] <fsphil> rule 0, don't be on fire
[22:13] <Lunar_Lander> xD yea
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[22:14] <jdtanner> New2Balloon: my advice is to have a look at the wiki and then try and code it up for yourself from scratch. You can always refer back to the wiki/hive mind if you need help :) It will save you a whole heap of bother later on when your code 'fails' for some reason, and you've got no idea what a certain functions does ;)
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[22:16] <New2Balloon> Thanks.. I'm certainly not against that.. Learning code is like learning chinese and the next day wanting to translate an international summit
[22:17] <daveake> Well, using someone else's code to start from is like being handed a translation to last year's international summit
[22:17] <jdtanner> Yep&in Welsh
[22:17] <New2Balloon> :D especially when they're speaking welsh
[22:17] <New2Balloon> ah beat me to it :)
[22:17] <jdtanner> lol&too many Red Dwarf fans here for my liking
[22:17] <jdtanner> ;)
[22:18] <Lunar_Lander> xD Craig Charles from Robot Wars
[22:18] <jdtanner> Thats the one
[22:18] <jdtanner> (although I prefer him on 6music)
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[22:18] <Lunar_Lander> btw, awesome music from 5:25 on: https://www.youtube.com/watch?v=Ai6GLZfoKuM
[22:18] <Lunar_Lander> ah
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[22:21] <forrestv> anyone who's had experience with IMUs: do you know if error (indirect) kalman filtering is basically equivalent to the hack that people do, integrating sensor data in the predict stage?
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[22:22] <natrium42> Laurenceb_: migh know
[22:23] <Laurenceb_> sup
[22:23] <Laurenceb_> forrestv: what do you mean by error?
[22:23] <Laurenceb_> as in state only contains the gyro bias etc
[22:25] <forrestv> Laurenceb_, you have a separate INS and then you have the kalman filter track the _error_ of the INS (e.g. the difference in position/velocity, the quaternion from the true frame to the INS's frame)
[22:25] <forrestv> i see it in academic papers often
[22:28] <Laurenceb_> me too
[22:28] <Laurenceb_> im often confused about the advantages
[22:28] <Laurenceb_> so sorry :S
[22:29] <Laurenceb_> im not sure thats what ive seen actually
[22:29] <Laurenceb_> ive seen gyro bias error etc in the kalman
[22:29] <Laurenceb_> thats slightly different
[22:29] <Laurenceb_> as it reduces size of the state vector
[22:34] <Laurenceb_> ive got a project running some code with a state vector of : attitude quaternion, velocity, position, gyro bias
[22:40] <Dan-K2VOL> hey natrium42
[22:41] <Dan-K2VOL> you still around daveake? I started up a page on the wiki about satellite modems- http://ukhas.org.uk/communication:satellite
[22:41] <Dan-K2VOL> upu you around?
[22:41] <daveake> yup I'm here still
[22:41] <daveake> I shall read now :)
[22:42] <Upu> hey dan
[22:42] <Upu> daveake's got the Iridium talking to Spacenear.us/Habitat
[22:42] <daveake> Yes I told Dan earlier :)
[22:42] <Upu> ah ok :)
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[22:45] <SpeedEvil> daveake: neat!
[22:47] <natrium42> hi dan, how are you?
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[22:56] <Dan-K2VOL> i heard that upu! that's great, daveake is it via email or the web interface?
[22:56] <Dan-K2VOL> doing well natrium42
[22:56] <Dan-K2VOL> linked your spot hacking page from that satcom wiki I posted
[22:57] <daveake> The web one. It does a POST to whatever URL you give it
[22:57] <Dan-K2VOL> ah that's great
[22:57] <Dan-K2VOL> would be good to add an email interface for other iridium data providers eventually, they usually don't have that nice of a web interface
[22:58] <daveake> So I wrote some python (for the first time) to receive that, convert the message from hex to ascii, then pass to the habitat python library to get it into the couchdb db
[22:58] <Dan-K2VOL> so good to have a generic direct link in finally, thanks daveake!
[22:58] <daveake> np :). was fun to do
[22:58] <daveake> Upu and I are hoping to fly it on Saturday
[22:58] <Dan-K2VOL> very cool!
[22:59] <Dan-K2VOL> upu how's the new device going
[22:59] <daveake> For now this python will run here on an RPi, but after it'll get put onto Kraken
[22:59] <Upu> not touched it yet Dan sorry been busy getting ready for Sat
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[23:00] <daveake> Yeah it's great they have email and POST options. Otherwise it was going to be screen-scraping from their web site :p
[23:01] <Dan-K2VOL> the direct iridium email method is a little more difficult to parse, it comes in as a binary MIME attachment
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[23:03] <daveake> Strange, as the messages are short and might as well go in the email body
[23:03] <Lunar_Lander> ah evening Upu, hope you are ok
[23:04] <Upu> I am !
[23:04] <daveake> It could be binary data of course hence it's converted to hex
[23:04] Nick change: Laurenceb_ -> UKLadyBoy
[23:04] <Upu> right calling it a night
[23:04] <Upu> err
[23:04] <daveake> nn
[23:04] <Upu> no I'm going to wait and see Laurence explain that one
[23:04] <Dan-K2VOL> night upu!
[23:04] <daveake> lol
[23:04] <Dan-K2VOL> well, that's just how Iridium does it - it just attached the binary message as a binary mime attachment
[23:05] Action: daveake taps fingers
[23:05] <Dan-K2VOL> the Rock7 guys are obviously re-processing it
[23:07] Nick change: UKLadyBoy -> Laurenceb_
[23:07] <daveake> yep
[23:07] <Dan-K2VOL> actually they provide it as a binary email attachment, though they are re-processing it
[23:07] <natrium42> it's very easy to redirect emails to a script though
[23:07] <Dan-K2VOL> not cool that they don't seem to let you email to it
[23:08] <natrium42> and there are libraries to decode the attachments
[23:08] <Dan-K2VOL> yes, just a little more work :-)
[23:08] <natrium42> yeah
[23:08] <natrium42> spacenarus tracker used to be able to accept emails to track@spacenear.us
[23:08] <Dan-K2VOL> nice
[23:08] <natrium42> used it for SMS to email
[23:09] <natrium42> it might still work, actually
[23:09] <natrium42> it will look for GPGGA sentence in the body of the email
[23:09] <Dan-K2VOL> cool
[23:10] <daveake> :)
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[23:40] <arko> eroomde: looks like the mars team will be down my street for the parade http://www.montrosechristmasparade.com/
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