highaltitude.log.20130214

[00:00] <eroomde> yo
[00:06] <nigelvh> 'sup pimp dizzle?
[00:07] <eroomde> well
[00:07] <eroomde> today has been quite a good one
[00:08] <eroomde> http://i.imgur.com/m0tXvga.jpg
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[00:09] <eroomde> Randomskk: u about?
[00:09] <nigelvh> Fancy pants dude!
[00:09] <nigelvh> Is that you?
[00:10] <eroomde> yes
[00:10] <eroomde> http://i.imgur.com/5FUJLvE.jpg
[00:10] <eroomde> mission control
[00:10] <nigelvh> Jealous
[00:10] <eroomde> got a tour with tom rivellini who was the entry descent and landing chief engineer for MSL
[00:10] <eroomde> and MER, and was the guy who had the idea of airbags in the first place for pathfinder
[00:10] <eroomde> an engineering hero of mine
[00:12] <eroomde> on the mission control window, on the left display with the terminal windows, is the raw strings coming in from each of the sats
[00:12] <eroomde> all the current things in space
[00:12] <eroomde> v much like fldigi
[00:12] <nigelvh> Fancy fucking pants!
[00:12] <eroomde> the 2nd up from bottom-left is Voyager 1
[00:13] <eroomde> and it's amazing to see strings from it appear every few minutes
[00:13] <eroomde> it's still out there sending back strings
[00:14] <nigelvh> The voyager systems are some of my personal favorite pieces of space hardware.
[00:14] <eroomde> also this morning
[00:14] <eroomde> http://i.imgur.com/OF2ZUAg.jpg
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[00:16] <eroomde> it's been a bit of a nerd day
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[00:17] <nigelvh> Damn dude! Totally jealous!
[00:18] <eroomde> yep!
[00:18] <eroomde> it's been opretty amazing
[00:19] <eroomde> saw loads and loads of stuff at jpl, the integration rooms, the whole mars yard, various labs, it was an amazing tour. i am one happy person atm
[00:19] <nigelvh> We got a tour a while back of the facilities at Huntsville where they do ISS stuff, which was also pretty cool.
[00:20] <eroomde> i'd love to head east sometime
[00:20] <eroomde> another trip
[00:23] <nigelvh> Yeah
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[00:32] <Randomskk> eroomde: around now
[00:33] <eroomde> ok
[00:33] <eroomde> standby
[00:34] <eroomde> http://i.imgur.com/m0tXvga.jpg
[00:35] <Randomskk> :|
[00:35] <Randomskk> the worst part is that even when you're back from your ridiculous holiday you'll just be posting photos of you testing fancypants rockets
[00:35] <Randomskk> amazing
[00:35] <Randomskk> all your photos look very cool
[00:36] <Randomskk> that said I am happy to say I saw an actual space shuttle launch which was very fun
[00:36] <Randomskk> and so had the tourist tour of kennedy space centre
[00:36] <eroomde> mission control
[00:36] <eroomde> http://i.imgur.com/5FUJLvE.jpg
[00:36] <eroomde> http://i.imgur.com/OF2ZUAg.jpg
[00:36] <eroomde> not launching, but i did touch the thermal tile
[00:36] <Randomskk> yea that is super awesome
[00:36] <Randomskk> I wasn't sure if I could be more jealous of your holiday, but yes
[00:37] <Lunar_Lander> cool!
[00:37] <Lunar_Lander> eroomde, are all probes controlled from that room?
[00:37] <eroomde> yes
[00:37] <Lunar_Lander> like Opportunity, Curiosity, the mars orbiters, cassini and so on?
[00:37] <Lunar_Lander> ah
[00:37] <eroomde> that's basically where everything in the deep space networks goes to and from
[00:38] <Lunar_Lander> yea
[00:38] <eroomde> something i spent a lot of time studying
[00:38] <eroomde> http://i.imgur.com/DvkLkjK.jpg
[00:38] <Lunar_Lander> so some time sharing has to be done
[00:38] <Lunar_Lander> xD awesome
[00:39] <eroomde> the official control room jar of peanuts
[00:39] <eroomde> http://i.imgur.com/cg3v6lX.jpg
[00:39] <Lunar_Lander> btw I like the Saturn on the screen of the telephone
[00:39] <Lunar_Lander> mission control room
[00:39] <Lunar_Lander> Data Controller station
[00:39] <Lunar_Lander> can you see it?
[00:40] <eroomde> yes
[00:40] <Lunar_Lander> so how does it work?
[00:40] <Lunar_Lander> i.e. Curiosity
[00:41] <Lunar_Lander> someone sets a target and then a program has to be written and checked
[00:41] <eroomde> yes
[00:41] <Lunar_Lander> and then it is brought into that room and uplinked?
[00:41] <eroomde> they design drives, there's al sorts of onboard checking in curiosity that will stop the drive if something unexpected happens
[00:41] <Lunar_Lander> yes
[00:41] <eroomde> they build 3d terrain maps of the area infront of them from the cams to design the drive
[00:41] <Lunar_Lander> like to prevent the wheels digging in
[00:41] <eroomde> if there's something more unusual they'll try it out in the mars yard first
[00:42] <Lunar_Lander> so there is a test model?
[00:42] <eroomde> yes, that's what i am standing infront of in that photo
[00:42] <eroomde> that was the mars yard
[00:42] <Lunar_Lander> ah
[00:42] <eroomde> hang on let me upload a better photo of the yard
[00:43] <Lunar_Lander> the soviets had their Lunadrome where Lunokhod was tested
[00:43] <Lunar_Lander> you could see that on "the planets"
[00:43] <Lunar_Lander> and Lunokhod could be driven live by someone with a hand controller
[00:43] <Lunar_Lander> no problem with just one second radio delay
[00:44] <eroomde> http://i.imgur.com/QsKtFiI.jpg
[00:44] <Lunar_Lander> nice
[00:44] <Lunar_Lander> how long is the tether?
[00:44] <eroomde> so they have slops of different materials (boulder to sandy) and general rocks and other things
[00:44] <eroomde> i don;t know
[00:45] <Lunar_Lander> ah
[00:45] <eroomde> maybe 30 or 40m
[00:45] <Lunar_Lander> ah OK
[00:45] <eroomde> it did a drive while we were there
[00:45] <eroomde> which was cool
[00:45] <Lunar_Lander> cool
[00:45] <Lunar_Lander> so they gave it a program and it tried to drive according to the set criteria?
[00:45] <eroomde> imgur has jpeg'd the f*ck out of these photos
[00:46] <eroomde> Lunar_Lander: well, they do all sorts of things
[00:46] <eroomde> you can email them if you want to know what they had for brekafast
[00:46] <Lunar_Lander> oh ok
[00:46] <Lunar_Lander> and is there any sign of Curiosity 2020 already?
[00:46] <Lunar_Lander> as they said that they confirmed it
[00:47] <eroomde> no, i suspect that's all just on paper
[00:47] <Lunar_Lander> yea
[00:47] <eroomde> or in storage as parts where they built 2 of the previous stuff
[00:47] <Lunar_Lander> when it landed I thought of a similar mission to the moon
[00:48] <Lunar_Lander> like when they built the LRO from MRO parts
[00:48] <Lunar_Lander> but of course you'd have to have certain targets to fulfil for a heavy lunar rover
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[00:50] <Lunar_Lander> eroomde, but I got a good news too
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[00:50] <Lunar_Lander> the payload board is already in place in the payload container
[00:50] <Lunar_Lander> :)
[00:50] <eroomde> nice!
[00:50] <eroomde> so ready to fly?
[00:51] <Lunar_Lander> I'd think so
[00:51] <eroomde> cool. when is the launch?
[00:51] <Lunar_Lander> my colleagues have an theoretical physics exam tomorrow
[00:51] <Lunar_Lander> after that we should be all ready
[00:51] <Lunar_Lander> well I planned March 1
[00:52] <Darkside> eroomde: i am insanely jealous
[00:52] <Darkside> just went through your pics
[00:52] <Lunar_Lander> hey Darkside :)
[00:52] <Darkside> hi Lunar_Lander
[00:52] <Lunar_Lander> btw for you both
[00:52] <Lunar_Lander> http://s.gullipics.com/image/j/b/y/5yvcud-klnxf9-3nfi/OERNENIIFlightBoardMk2.png
[00:53] <eroomde> Darkside: cool huh?
[00:53] <Darkside> eroomde: very
[00:56] <Lunar_Lander> what do you think eroomde Darkside ?
[00:56] <eroomde> looks like a schematic
[00:57] <eroomde> can't see anything immediately obviously wrong but checking a eschematic takes a long time and cocentration
[00:57] <eroomde> you might benefit from labling all the connectors something relevent
[00:57] <eroomde> but eqaully there's not that much so it's ok really
[00:57] <eroomde> and i'm assuming this is the tested circuit ready to fly, so it obviously works
[00:59] <Lunar_Lander> yeah
[00:59] <Lunar_Lander> well that is supposed to be the next version
[00:59] <arko> damn traffic sucked
[00:59] <Lunar_Lander> I want to go from the "stack" of sensor board and arduino to a CPU on the board
[00:59] <Lunar_Lander> for the next one
[00:59] <arko> sup eroomde
[01:00] <eroomde> yo!
[01:00] <eroomde> you all done?
[01:00] <Darkside> arko: YOU WORK AT AN AWESOME PLACE
[01:00] <eroomde> or there now?
[01:00] <arko> im at school now
[01:00] <Lunar_Lander> btw
[01:00] <arko> Darkside: it's humbling to be among these epople
[01:00] <arko> people*
[01:00] <Lunar_Lander> we got horse meat in food in germany too now
[01:01] <arko> eroomde: pictures are awesome :)
[01:01] <eroomde> i'll zip them all up properly and get them on dropfox for u, the whole lot
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[01:03] <arko> :)
[01:03] <arko> awesome
[01:03] <arko> that picture with the msl peanuts is awesome :)
[01:04] <eroomde> :)
[01:05] <arko> now i need to write a very nice thank you letter to tom
[01:05] <Lunar_Lander> what is special about MSL peanuts?
[01:05] <eroomde> http://i.imgur.com/5jjiczm.jpg
[01:05] <arko> without sounding creepy
[01:05] <eroomde> same
[01:05] <arko> haha, that dog was a trip
[01:05] <Lunar_Lander> xD
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[01:24] <eroomde> arko: lol at tweet
[01:25] Action: arko puts on his IceCube face
[01:25] <Randomskk> #winning. my whole house just got together to buy our housemate a box of fancy artisan cheese for her birthday
[01:25] <Randomskk> she's massively lactose intolerant
[01:25] <arko> hahaha
[01:25] <Randomskk> luckily I also bought her a bottle of lactase >_>
[01:25] <arko> she's in for the farts
[01:25] <Randomskk> no she gets really really sick and ill for days
[01:25] <Randomskk> if she has so much as a splash of milk
[01:26] <arko> :( yikes
[01:26] <arko> no fun
[01:26] <Randomskk> however with a bottle of lactase she can chew down on as much cheese as she wants
[01:26] <arko> science yo
[01:26] <Randomskk> amazing that you can just buy giestive enzymes in pills
[01:26] <Randomskk> digestive
[01:27] <arko> #future
[01:27] <SpeedEvil> does fecal transplants help lactose intolerance?
[01:27] <eroomde> i thought the #winning was because you'd get to eat the cheese instead
[01:27] <Randomskk> I don't know
[01:27] <Randomskk> eroomde: oh I imagine we will eat some of it anyway ;)
[01:27] <Randomskk> but I'm still fully stocked after the trip to france
[01:27] Action: SpeedEvil is unsure what produces lactose.
[01:27] <Randomskk> on the wine and cheese fronts
[01:27] <Randomskk> SpeedEvil: at the very least you can induce the lac operon in e. coli to produce it using IPTG
[01:27] <SpeedEvil> that reminds me, I need to make more yogurt
[01:27] <eroomde> i am keen for portion sizes suitable for humans
[01:28] <Randomskk> then just lyse the cells and purify
[01:28] <Randomskk> eroomde: hah
[01:28] <Randomskk> oh man, today was a great day for food
[01:28] <SpeedEvil> portion control is hard
[01:28] <Randomskk> had luncheon with my tutor, which was a full formal meal with three courses and wine and coffee etc
[01:28] <SpeedEvil> I had chips, a sausage, and some pasta sauce that was left over
[01:28] <Randomskk> then had dinner at pembroke feast day formal
[01:29] <Randomskk> which was amaaazing
[01:29] <Randomskk> as ever
[01:30] <SpeedEvil> :-)
[01:30] <SpeedEvil> now all you need to do is to go for a brisk 23 mile run to burn it off.
[01:31] <Randomskk> hehe
[01:31] <Randomskk> or just stay alive for a few days
[01:31] <Randomskk> base metabolic rate is pretty decent
[01:31] <SpeedEvil> about a hundred watts
[01:32] <arko> eroomde: i can't write this letter without sounding weird/creep
[01:32] <arko> >_<
[01:32] <eroomde> :)
[01:32] <SpeedEvil> fun fact.
[01:33] <SpeedEvil> plain white flour is cheaper per joule than electricity
[01:33] <arko> http://www.quickmeme.com/meme/3szexy/
[01:33] <eroomde> send him that
[01:33] <arko> hahaha
[01:34] <arko> no way
[01:34] <Randomskk> it's okay to be a little gushing
[01:35] <arko> i think it creeped him out
[01:35] <arko> i bet eroomde 5 quid i would do that subconsciously
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[01:48] <arko> damn, i just want to build a earth based edl system for the kicks now
[01:48] Action: arko knows what he's next project is after habex2
[01:50] <arko> his*
[01:50] <arko> jesus what happen to my english today
[01:50] <eroomde> gotta get into orbit first
[01:51] <arko> psshhh, thats the trajectory teams problem
[01:51] <arko> i'll just make a hab pop to simulate entry
[01:56] <Randomskk> have fun finding a jet stream that's moving at orbital entry velocity :P
[01:57] <arko> :P
[01:57] <arko> im more interested in the last few meters of decent
[01:57] <arko> something either powered or go airbag
[01:57] <arko> it's crazy and not all that pointless, but still cool
[01:57] <Randomskk> build a little autonomous rover
[01:58] <Randomskk> and drop that
[01:58] <Randomskk> put an iridium modem on it for comms
[01:58] <Randomskk> (for bonus points just put a radio transceiver on that can chat to overhead HABs)
[01:58] <arko> yeah!
[01:58] <arko> i love this idea
[01:59] <arko> hab will be my repeater
[01:59] <Randomskk> it's come up here before
[01:59] <arko> edl and do some science
[01:59] <arko> "edl"
[01:59] <arko> more like "dl" even
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[05:43] <arko> Ahh home sweet home
[05:49] <nigelvh> Similarly
[05:49] <nigelvh> Now I'm about to enjoy a tuna quesadilla
[05:56] <arko> Mmmm
[05:57] <arko> Now i want steak quesadillas
[05:57] <nigelvh> It's damn delicious
[05:57] <arko> Im too cozy here
[05:58] <nigelvh> Also watching south park. A good evening.
[05:59] <arko> Nice! Which episode?
[05:59] <nigelvh> Presently "Cartman Joins NAMBLA"
[05:59] <arko> Haha
[05:59] <arko> Marlin brando look alikes
[05:59] <arko> Good episode
[06:00] <nigelvh> mmhmm
[06:02] <arko> Im watching all sorts of interesting videos, eroomde told me about http://www.reddit.com/r/artisanvideos
[06:08] <nigelvh> Oh internets
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[11:59] <costyn> hello
[12:00] <costyn> is this thing on?
[12:00] <costyn> or did everyone leave to a more popular channel
[12:00] <HixWork> #Barely, beed dead quiet past few days
[12:00] <costyn> HixWork: except in the weekends when there were launches
[12:00] <HixWork> yup
[12:01] <costyn> uploaded pics of our upcoming listening station at our hackerspace: http://imgur.com/a/q2tea
[12:02] <costyn> antenna is going up saturday, should be live shortly after
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[12:03] <mfa298> seems like most activity on here is when I've not been around, certainly the daytimes have been quiet.
[12:04] <HixWork> costyn, you running dl-fldigi on a Pi?
[12:05] <costyn> HixWork: nope, just rtl-tcp, which ports the raw frames to a server running gqrx and dl-fldigi
[12:05] <HixWork> ah ok, didn't think it had the grunt to run it
[12:05] <mfa298> looks like a nice setup
[12:06] <costyn> HixWork: indeed it doesn't. it does ok with rtl-tcp
[12:06] <fsphil> I've toyed with the idea of doing an ncurses interface for fldigi
[12:06] <HixWork> yeaa
[12:07] <costyn> mfa298: thanks, been a while in the making. certainly sourcing all the bits and finding a way to route signal from the 2nd floor roof to the hacklab in the basement was a challenge
[12:07] <costyn> mfa298: we've been really lucky with that disused chimney
[12:11] <costyn> fsphil: ncurses would be quite cool and useful
[12:11] <costyn> fsphil: I assume the waterfall would be the hardest bit?
[12:12] <fsphil> I suspect so
[12:13] <fsphil> could use the ascii-art library :)
[12:13] <costyn> ah yea
[12:13] <fsphil> wonder what that would look like
[12:14] <mfa298> could be interesting
[12:14] <costyn> I remember once playing quake with the aalib plugin
[12:16] <mfa298> I've run vlc with aalib as an output, that gets interesting.
[12:19] <costyn> case in point: telnet towel.blinkenlights.nl (from a terminal window)
[12:20] <fsphil> hah, not seen that in ages
[12:20] <mfa298> supposedly that's in colour with IPv6 but I've never seen it in colour
[12:21] <fsphil> "Well, the IPv6 version is exactly the same as the IPv4 one."
[12:21] <fsphil> "The difference is in the visitors..."
[12:22] <mfa298> I just saw that
[12:22] <fsphil> not exactly the same, it has that message
[12:23] <mfa298> and the IPv4 version has a message about trying the IPv6 version for more scenes and colour.
[12:23] <mfa298> I'm guessing the colour and extra scenes was a planned addition that never happened
[12:23] <costyn> could be
[12:23] <fsphil> or a sneaky trap to try and get more people on ipv6!
[12:24] <costyn> likely
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[16:01] <griffonbot> Received email: chris hillcox "[UKHAS] Calculating free lift for a 1200g balloon at its payload
[16:05] <griffonbot> Received email: David Akerman "Re: [UKHAS] Calculating free lift for a 1200g balloon at its payload
[16:16] <HixWork> 4.54 m3 ouch, costly
[16:16] <HixWork> but then again, I'm guessing a 2000g payload is going to be too
[16:16] Action: HixWork thinks someone is flying a DSLR
[16:16] <daveake> Could well be
[16:17] <NigeyS> or a house brick :|
[16:17] <HixWork> unfortunatley my DSLR body alojne is 1,252 g
[16:18] <daveake> http://www.bbc.co.uk/news/uk-england-berkshire-21455717?SThisFB
[16:18] <LazyLeopard> That's more than the 817.... ;)
[16:18] <NigeyS> lol horizon has been kidnapped!
[16:19] <LazyLeopard> Ah. Tilehurst...
[16:19] <HixWork> reminds me of Snoopy Sloop
[16:19] <daveake> Dooomed
[16:19] <costyn> :)
[16:19] <fsphil> arg, space balloon!
[16:20] <HixWork> whoa, #highaltitude awoke
[16:20] <fsphil> it's your imagination
[16:20] <costyn> HixWork: someone mentioned "space"
[16:20] <fsphil> we're not really here
[16:20] <HixWork> :D
[16:20] <HixWork> i cant wait to launch my space balloon
[16:20] <costyn> everybody's heckle's raised
[16:20] Action: costyn smacks HixWork
[16:20] <fsphil> some day I'm gonna buy a big rocket, stick a balloon on it and have it released at 120km
[16:21] <fsphil> then go to the news... "see, *this* is a space balloon"
[16:21] Action: HixWork ducks
[16:21] <gonzo_> pop
[16:21] <mattbrejza> i think it would just be easier if they moved space back to 30km
[16:21] <fsphil> you're not really in space if there's wind
[16:21] <fsphil> suppose there is the solar wind
[16:22] <mattbrejza> yea i know, still easier :P
[16:22] <gonzo_> better not eat onions on ISS then
[16:22] <mattbrejza> also fsphil is that a balloon launched rocket?
[16:22] <fsphil> balloon launched rocket
[16:22] <fsphil> release it at 120km, have it auto fill
[16:22] <HixWork> "the payload fell back to earth helped along by a parachute."
[16:22] <HixWork> really, why would you use a dense chute?
[16:23] <HixWork> retarded
[16:23] <HixWork> by
[16:23] <mattbrejza> as in rockoon that releases a ballon? :P
[16:23] <fsphil> more a ballocket
[16:23] <LazyLeopard> Tilehurst being the kind of place where you count the wheels on your car after you've driven through, IIRC...
[16:23] <daveake> yup
[16:24] <daveake> So they might get the box back
[16:24] <mattbrejza> saturday wasnt the best day for habs
[16:24] <daveake> nope
[16:24] <daveake> sunday was ok though :)
[16:24] <fsphil> anyone got the pressure of a full T-size cylinder of He from BOC?
[16:24] <mattbrejza> only just
[16:24] <mattbrejza> 200bar
[16:24] <fsphil> ta
[16:25] <mattbrejza> http://www.boconline.co.uk/en/products-and-supply/balloon-gas-and-equipment/balloon-gas/balloon-gas.html
[16:25] <daveake> I read that as "bacon online"
[16:25] <fsphil> mmm
[16:25] <fsphil> ebacon
[16:25] <gonzo_> balloon gas is not all he though.
[16:26] <gonzo_> so that would throw the req inflation calcs?
[16:26] <daveake> Another advantage of h2
[16:26] <HixWork> someone need to pioneer a new antenna and call it the bacone
[16:26] <daveake> :)
[16:26] <costyn> HixWork: :D
[16:26] <gonzo_> unless calculating relative to a previous balloon gas fill
[16:27] <gonzo_> or bear can in jamaica
[16:27] <costyn> no relevant results on google images for 'bacon antenna'
[16:27] <HixWork> fnaaar
[16:27] <HixWork> I'm not searching that term at work :)
[16:28] <costyn> not seen any nsfw images tbh... just bacon and antenna and pics of people (no idea why)
[16:28] <HixWork> lloks like the delay with hackvana's fab is a blessing in disguise
[16:29] <HixWork> now i may have a GSM/GPRS piggy-back board at the siame time as the tracker
[16:29] <HixWork> WIN
[16:31] <mfa298> The local berkshire story that the bbc pages links to is even worse: Space hunt after satellite crashes in Tilehurst
[16:31] <mfa298> http://www.localberkshire.co.uk/news/roundup/articles/2013/02/13/86696-space-hunt-after-satellite-crashes-in-tilehurst/
[16:32] <daveake> sigh
[16:32] <NigeyS> SCHOOL space explorers are appealing for help to find a satellite which crashed to the ground in Tilehurst at the weekend.
[16:32] <NigeyS> says it all really
[16:33] <LazyLeopard> Oh dear.
[16:33] <LazyLeopard> (or perhaps that should be "Oh Dear(tm)"
[16:33] <NigeyS> lol
[16:34] <mattbrejza> it had lock down to 852?
[16:34] <NigeyS> yup
[16:34] <mattbrejza> or did it lose lock on landing?
[16:34] <fsphil> they didn't have a radio
[16:34] <NigeyS> i thought they managed to track it to a corner house .. last update i saw on the list anyway
[16:34] <fsphil> oh wait, they did have a radio but didn't seem to be able to get it going
[16:34] <daveake> If I'd been available I could have gone down to find it
[16:35] <mfa298> I think the radio tracking had a general area around basingstoke but later the phone signal was around reading.
[16:35] <LazyLeopard> Hmmm.... That's a bit of distance....
[16:35] <mattbrejza> 51.2569843,-1.0490304 last gps
[16:36] <mfa298> it sounded like they were having some issues with their radio reciever.
[16:36] <mattbrejza> it probably kept going fine then
[16:37] <HixWork> I think they only had a duck antenna
[16:37] <HixWork> so they couldn't get a direction, or a signal for that matter
[16:37] <fsphil> I don't think they knew how to tune it
[16:37] <mattbrejza> still should have been fine if they drove to that location, or at least i would have thought do
[16:38] <mattbrejza> so
[16:38] <mattbrejza> we drove past that on saturday, no radio on us though (and didnt know it was missing there)
[16:38] <mattbrejza> also it was raining and dark
[16:38] <fsphil> the sun is out here today. been a while, caused quite a panic
[16:39] <mfa298> it sounded like they'de tried driving around a lot of the area it landed in
[16:39] <mfa298> but couldn't hear it - but then I'm not sure how much they were tracking it themselves before or if they were just relying on everyone else
[16:39] <mattbrejza> if they didnt know how to use the radio then it was a bit of a needle/haystack situation
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[16:54] <griffonbot> Received email: Adam Greig "Re: [UKHAS] Calculating free lift for a 1200g balloon at its payload
[17:06] <griffonbot> Received email: Steve Aerospace "Re: [UKHAS] Calculating free lift for a 1200g balloon at its payload
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[17:35] <Elwell> http://www.youtube.com/watch?v=5REsCTG4-Gg&t=2m14s -- love the burst
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[17:48] <Hix> could someone let me know the polarity [even what the symbol is] for the cap E1 in the schematic http://i.imgur.com/dUR8cTu.png?1
[17:48] <Hix> I've not come across the symbol before
[17:49] <bertrik> I think it's an electrolytic capacitor
[17:50] <Hix> yup, but i'm not sure what the polatiry of the schematic is
[17:50] <mattbrejza> well the terminal going to V++ is positive
[17:50] <bertrik> ??? the pin connected to the ground symbol is the negative one
[17:51] <Hix> wanted to be 100 sure as it's a weird symbol so want sure if reversed or not
[17:51] <bertrik> usually a black line with a "-" inside it on the physical capacitor
[17:51] <Hix> sure, got them, its just the symbol that's throwing me
[17:52] <Hix> never seen that variant
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[18:13] <HixPad> If Im running my tracker on 3v3 then there is no reason to have a level converter for se card interface is there?
[18:13] <HixPad> Se
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[18:13] <HixPad> Grrr piss off apple SD card
[18:13] <mattbrejza> nope
[18:14] <mattbrejza> i would put a resistor on MISO to prevent both devices talking at once
[18:17] <griffonbot> Received email: chris hillcox "[UKHAS] Re: Calculating free lift for a 1200g balloon at its payload
[18:17] <HixPad> As in SD and arduino miso talking at once? Std 10k?
[18:17] <mattbrejza> yea, although you can use the SPI bus for other stuff too
[18:17] <HixPad> Ok at
[18:17] <HixPad> Ta
[18:18] <HixPad> God I love apple autocorrect
[18:18] <mattbrejza> i think 10K should be fine, its not that high speed enough for the time constant to be signifcant
[18:18] <HixPad> Cool cheers
[18:19] <mattbrejza> time constant of the 10K and stray capacitance
[18:19] <HixPad> Errrr yeah :)
[18:19] <bertrik> well, you can put resistors on any output/input using that line of reasoning
[18:19] <griffonbot> Received email: Anthony Stirk "Re: [UKHAS] Re: Calculating free lift for a 1200g balloon at its
[18:20] <mattbrejza> the time constant one of the talk at the same time one?
[18:21] <mattbrejza> the main reason you would on SPI is if you had multiple devices, but accidently turning on the MISO line might damage a SD card
[18:21] <mattbrejza> very helpful Upu :P
[18:22] <HixPad> So if I were to program the at mega with a card in it could damage it. Resistor would stop this happening
[18:23] <mattbrejza> na when its being programmed the pins are Hi-Z
[18:23] <mattbrejza> oh btw, you should put a pullup on CS because of that ^
[18:23] <bertrik> it depends on your confidence in your programming skills I guess :)
[18:23] <HixPad> Now I am lost
[18:24] <HixPad> Non existent ;)
[18:24] <mattbrejza> put a 10K pullup on CS, 10K on MISO and be done with it :P
[18:24] <HixPad> Ok that's better, it'll do for now until I understand more
[18:25] <mattbrejza> Hi-Z means high impedance (ie not connected to anything)
[18:25] <HixPad> Ok
[18:25] <mattbrejza> well not connected to a power rail
[18:25] <mattbrejza> still might be an input
[18:26] <HixPad> Right
[18:29] <HixPad> Though thinking lazily, there isn't really a need for SD logging is there? Can't the flight be pulled from habhub and exported to cvs and turned into gpx Kml etc?
[18:29] <HixPad> Also the 5x5 board is somewhat crowded at the mo
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[18:32] <griffonbot> Received email: chris hillcox "Re: [UKHAS] Re: Calculating free lift for a 1200g balloon at its
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[18:40] <HixPad> Well I've gone and read up on spi so am a little clearer on what it all means now.
[18:40] <HixPad> Little bits everyday add up
[18:44] <fsphil> spi is quite nice
[18:44] <fsphil> i2c is evil
[18:44] <fsphil> 1-wire is also quite nice
[18:45] <mattbrejza> how about udp over i2c? that makes it good right?
[18:45] Action: fsphil gives mattbrejza the evil look
[18:46] <NigeyS> lol
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[18:49] <HixPad> I'm on a pad so to save time what is i2c?
[18:50] <HixPad> Ahh 2 wire seen sda etc before
[18:50] <HixPad> I'll leave that for another day though :)
[18:50] <HixPad> But I am making som e progress
[18:51] <fsphil> it's the AVR's way of implementing I2C that I really don't like, I'm not sure about the actual wire protocol
[18:51] <HixPad> So much so that tracker should have gsm and GPRS for first launch
[18:51] Action: HixPad gives himself a little pat on back
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[18:52] <bertrik> is GSM/GPRS legal on a balloon?
[18:53] <fsphil> on the ground almost certainly, in the air possibly, however of limited use
[18:55] <HixPad> Only for when it's landed and isn't located, a backup system
[18:55] <HixPad> 2km limit sees to that anyhow
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[18:55] <Lunar_Lander> hello
[18:55] <HixPad> Hi Lunar_Lander
[18:56] <fsphil> airlines don't allow mobile phones, but I don't know if it's an OFCOM restriction
[18:56] <W0OTM> howdy
[18:56] <fsphil> I'm sure I read somewhere about it being fine to use phones on a private plane
[18:56] <HixPad> They've started to relax that
[18:57] <W0OTM> bertrik: in the US, you can't use digital modes over GMRS/FRS
[18:57] <SpeedEvil> it's captains discretion
[18:57] <W0OTM> oops, I see GMS (cellular) sry
[18:57] <HixPad> And seeing as he's now locked away it's fine :)
[18:57] <W0OTM> GSM :)
[18:58] <HixPad> Im saying nothing W0OTM being the typo king I am :)
[18:58] <W0OTM> LMAO
[19:00] <Lunar_Lander> xD
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[19:02] <HixPad> Wow fsphil would these be any use in a nest box?
[19:02] <HixPad> www.2k1.co.uk/products/productdesc.php
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[19:03] <HixPad> That link looks a bit generic to me, does it work externally
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[19:03] <bertrik> no
[19:03] <Lunar_Lander> evening dave
[19:03] <HixPad> Thought not
[19:04] <HixPad> http://www.2k1.co.uk/products/productdesc.php?pid=21be9a4bd4f81549a9d1d241981cec3c
[19:04] <fsphil> yea sql error
[19:04] <HixPad> That should its got SQL Id attached ow
[19:04] <HixPad> Now
[19:05] <fsphil> tiny, but you'd need to wire it up and capture the data digitally
[19:06] <HixPad> Would that involve an analogue to digital converter
[19:06] <fsphil> the opposite, that camera is digital
[19:07] <HixPad> Oops
[19:07] <fsphil> you'd need a little circuit to talk to the camera and capture a frame
[19:07] <fsphil> I'm trying to find the little colour camera I have
[19:07] <HixPad> It looks good though, small and very low cost
[19:08] <HixPad> That site is like an alladins cave
[19:10] <fsphil> the b&w cameras I use are: http://cpc.farnell.com/defender-security/gm300/camera-1-3-420-tvl-3-7mm-lens/dp/SR05104
[19:10] <fsphil> I can't find the colour one anymore
[19:10] <HixPad> Cool cheers
[19:11] <fsphil> the black and white ones make things much simpler, as all you need is a couple of IR leds for lighting
[19:11] <fsphil> the birds can't see it
[19:17] <HixPad> I've ordered some ir led arrays from the far east, it'll be like floodlighting
[19:17] <fsphil> might be too much :)
[19:17] <HixPad> That lens should poke through the aperture in them too
[19:17] <HixPad> For the cost I'll just break excess ones off
[19:17] <fsphil> my box only has two IR LEDs, and I had to reduce the voltage going to them a bit
[19:18] <fsphil> try to partition the electronics from the main box
[19:18] <fsphil> or you'll have them trying to sleep on or near the camera for warmth
[19:19] <bertrik> are you running the camera system off batteries or from main power?
[19:22] <fsphil> mains
[19:22] <fsphil> well, 12V through the cat5 cable
[19:22] <fsphil> (probably 10V by the time it gets there)
[19:24] <HixPad> It'll be low voltage not sure yet
[19:25] <HixPad> Not sure how the cat5 system works yet
[19:26] <fsphil> four pairs, I send the power down two
[19:26] <fsphil> video and audio down the other two
[19:27] <fsphil> using a video and audio 'balun' on both ends
[19:27] <fsphil> if you didn't use the balun you'd get a pretty bad picture
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[19:29] Action: HixPad searches balun
[19:29] <HixPad> Cheers for the info
[19:31] <HixPad> What do they feed into at the other end?
[19:32] <HixPad> Just power and VGA ?
[19:39] <jcoxon> evening all
[19:40] <fsphil> the balun connects the cameras composite signal to the twisted cable
[19:40] <fsphil> and the opposite at the other side, into a video capture card in my case
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[19:43] <HixPad> Ok, any ideas how I could get a system whereby if gf went to a specific ip address she could view it from a local device?
[19:43] <HixPad> Hi jcoxon
[19:44] <fsphil> to make things easy, you could just put an IP camera on the box
[19:44] <fsphil> on/in
[19:45] <fsphil> you can get cheap not-quite-POE POE adaptors to power and network it over a single cat5 cable
[19:45] <fsphil> or a wireless IP camera
[19:45] <fsphil> that might be easier tbh
[19:45] <fsphil> there are some that are quite flat, and would fit in the roof nicely
[19:46] <fsphil> you could use the same power supply to light up a few IR LEDs
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[19:46] <HixPad> One annual nesting area is a little topiary bush in the back garden so need something in there but it'd need to be small
[19:47] <HixPad> I'll look into how ip cameras work and try and hack something
[19:48] <fsphil> they're handy in that they're already networked
[19:48] <HixPad> I enquired about my Sony bullet cam. It's good down to 0.05 lux but they've put an ir filter on it
[19:48] <HixPad> Arse
[19:48] <fsphil> would still give you views during the daytime
[19:48] <HixPad> Sure
[19:48] <fsphil> but without additional light it might be a bit noisy
[19:48] <fsphil> the inside of boxes tend to be pretty dark
[19:49] <fsphil> I've seen some with windows on the sides
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[19:57] <HixPad> It's a catch 22 they like to nest in dark places
[19:57] <fsphil> yea, although they quickly adapt to having lights on
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[19:58] <HixPad> Maybe some of my SMd yellow LEDs might be enough
[19:58] <HixPad> Just epoxied to the sides of the box
[19:59] <HixPad> Gonna get some wood sat and start making
[19:59] <fsphil> I put my LEDs behind a bit of frosted plastic, just to reduce the shadows
[19:59] <HixPad> Can always turn light off so as not to disturb too much
[19:59] <fsphil> well in two of my boxes anyway, one is just direct but the shadows are quite strong
[19:59] <fsphil> yea never have it on at night
[20:00] <HixPad> Nope not fair on em
[20:00] <fsphil> I left it on by mistake one time and the female nearly left the box at 11pm
[20:00] <HixPad> They have enough grief with humans cats and foxes as it is
[20:00] <fsphil> cats are a problem here
[20:01] <fsphil> twice one of the parent disappeared in the last week
[20:01] <HixPad> We had a robins nest massacred two years ago, took mum and left her about 6 feet away
[20:02] <HixPad> All the little spikey haired punk chicks perished
[20:02] <fsphil> it happens. sucks though
[20:02] <HixPad> Gf was unconsolable
[20:02] <HixPad> Inconsolable
[20:02] <fsphil> it's worse with a camera in the box
[20:02] <fsphil> if boths parents disappear
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[20:03] <HixPad> I was planning on all external only an aperture for cam
[20:03] <fsphil> raising them by hand is a *lot* of work
[20:03] <HixPad> Maybe LEDs inside but minimal
[20:04] <HixPad> They'll not really survive without parents I dont think
[20:04] <fsphil> probably not
[20:04] <HixPad> Need to learn bird business
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[20:04] <fsphil> my neighbour built a big shed next to our garden, and killed all the trees, so I'm not sure if we'll get any activity this year
[20:05] <HixPad> Fekkers
[20:05] <fsphil> aye
[20:05] <HixPad> The healthy eaters?
[20:05] <fsphil> not sure actually, the microwave could have been either neighbour
[20:06] <fsphil> but I suspect yes
[20:06] <HixPad> Kinda goes together
[20:06] <fsphil> the swifts will definitely be back
[20:07] <fsphil> this really is an odd topic for #ha :)
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[20:08] <domlin> evening all
[20:08] <fsphil> howdy domlin
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[20:09] <domlin> how are you fsphil ?
[20:10] <fsphil> all spiffy here domlin, you?
[20:10] Action: fsphil seems to have spend all week fixing laptops
[20:10] <domlin> likewise :)
[20:10] <HixPad> Sorry yeah, keep it off here
[20:10] Action: domlin seems to have spent the last 3 weeks on the phone to his insurance company
[20:12] <fsphil> urg
[20:12] <domlin> indeeed
[20:14] <fsphil> banks and insurance companies. hate dealing with either
[20:14] <domlin> they seem to be the only people that i've spoken to on the phone with for literally 3 weeks, nightmare!
[20:15] <domlin> finally getting somewhere though.
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[20:30] <Lunar_Lander> hi Nigey|
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[20:39] <Nigey|> lo Kev
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[20:43] <Lunar_Lander> how are you today?
[20:44] <Nigey|> I'm good thanks, and you ?
[20:45] <Lunar_Lander> me too, thank you
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[20:55] Nick change: nigel-win__ -> NigeyS
[20:55] <NigeyS> gr
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[21:18] <chrisstubbs> Evening
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[21:20] <domlin> hello chrisstubbs
[21:20] <fsphil> ahoy there
[21:21] <chrisstubbs> foundation exam passed :)
[21:21] <fsphil> congrats!!
[21:21] <fsphil> picked a callsign yet? P)
[21:21] <fsphil> :)
[21:21] <Lunar_Lander> COOL
[21:21] <LazyLeopard> Excellent!
[21:21] <LazyLeopard> When do you take the next one?
[21:21] <LazyLeopard> ;)
[21:22] <fsphil> lol
[21:22] <fsphil> yep, can't stop at foundation :)
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[21:22] <LazyLeopard> Hey, no point in hanging around. ;)
[21:23] <chrisstubbs> i wonder if M6HAB is taken ;)
[21:25] <fsphil> no sign of it on google
[21:27] <LazyLeopard> ...but lots of M6 calls get not much use. Only way to find out for sure is through the Ofcom system...
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[21:28] <fsphil> true
[21:28] <fsphil> I was hoping to get MI6SPY
[21:28] <fsphil> but someone already got it :)
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[21:31] <chrisstubbs> aha have to wait till wednesday to apply apparently, they have to post the results off etc
[21:31] <domlin> can you do rude words?
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[21:45] <LazyLeopard> chrisstubbs: Yeah, it's at the mercy of the Post Office, too.
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[21:46] <LazyLeopard> One lot of papers we had were mis-stamped by the PO clerk and sent 2nd class even though 1st had been paid for... As you can imagine that was a little less than popular...
[21:48] <fsphil> you can register on the ofcom site anyway, and put in your candidate number
[21:49] <fsphil> then wait :)
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[22:01] <jcoxon> ping Upu
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[22:14] <Upu> pong jcoxon
[22:14] <jcoxon> got aprs working
[22:14] <Lunar_Lander> cool
[22:14] <Upu> oh sorted what was it ?
[22:16] <domlin> today i bought an automated coffee machine. I should probably connect it to the internet
[22:16] <jcoxon> oh rfm aint working
[22:17] <Upu> ah ok
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[22:17] <Upu> thats very odd
[22:17] <Upu> I'll send another board
[22:18] <meatmanek> Upu: what kind of board are you talking about?
[22:18] <Upu> its a PCB jcoxon and I have been working on
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[22:18] <Upu> does RTTY and APRS on one small board
[22:18] <meatmanek> neat
[22:19] <meatmanek> two little HX1 transmitters or something?
[22:19] <Upu> no RFM22B and a HX1 daughter board
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[22:20] <Upu> sec
[22:20] <Upu> sure I have a picture somewhere
[22:21] <Upu> http://imgur.com/a/GSsnT#0
[22:26] <chrisstubbs> UPU can you run that at 300mw APRS with an amateur licence? or does it have to be outside the UK?
[22:26] <Upu> outside the UK
[22:26] <Upu> hence the test of the geofencing code last weekend
[22:28] <chrisstubbs> ah cool, been doing SMD training with domlin today, about time i started design revesion 3.0 for my tracker :P
[22:29] <domlin> ah yep, enjoyed that!
[22:29] <Upu> cool I recommend it :)
[22:30] <nigelvh> Is the kapton tape to cover the vias from touching the RFM?
[22:31] <Upu> note the large via bottom right, thats how I solder the GND pad on the step up
[22:31] <nigelvh> Ah
[22:31] <Upu> there is nothing under the RFM at that point but I just put it there in case
[22:31] <Upu> it would probably be fine
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[22:55] <arko> Upu: is there an eagle library on the wiki for the ntx, ublox, and etc
[22:55] <arko> ?
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[23:18] <Lunar_Lander> arko, Robert Harrison made an NTX2 for Eagle
[23:19] <Lunar_Lander> http://www.robertharrison.org/icarus/wordpress/hardware/icarus-payload-hardware-setup-guide/
[23:19] <NigeyS> actually..
[23:19] <NigeyS> arko, https://github.com/Upuaut/Eagle-Libraries
[23:20] <NigeyS> has all of them
[23:26] <Lunar_Lander> awesome!
[23:26] <Lunar_Lander> thanks NigeyS
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[23:47] <arko> Ah great! Thanks!
[23:56] <Lunar_Lander> you're welcome
[23:57] <Lunar_Lander> but the libraries don't work
[23:58] <Lunar_Lander> could be because I have Eagle 5.12.0
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[00:00] --- Fri Feb 15 2013