highaltitude.log.20140324

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[00:36] <saadzmirza> Anyone here?
[00:38] <saadzmirza> No?
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[00:40] <amell> No.
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[00:46] <DL7AD> morning
[00:56] <jiffe98> whats a good IC gps receiver these days for high altitude work?:
[00:59] <DL7AD> jiffe98: i just know the ublox modules
[00:59] <DL7AD> have a look for MAX7 and NEO7
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[01:31] <jiffe98> those only work up to 50km ;)
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[07:14] <cm13g09> SP9UOB-Tom: any chance of not having your IRC client emit "SP9UOB-Tom is gone. Gone since Sun Mar 16 20:53:00 2014" every time you rejoin the channel?
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[07:15] <cm13g09> doesn't bother me too much.
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[10:54] <Maxell> Morning.
[10:56] <ulfr_> Mornin'
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[11:43] <malgar> Upu: UpuWork what's the typical discharge of the gps breakout board?
[11:43] <UpuWork> current usage ?
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[11:44] <malgar> yes
[11:45] <UpuWork> 25mA on acquire 12mA on tracking down to 6mA in cyclic for the 7Q
[11:45] <mattbrejza> although the regulator should be able to supply at least 60mA or so
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[11:54] <malgar> the question arises because it seems that ntx2b doesn't work well when connected to arduino with the gps board. It has a frequency shift and it sends garbage
[11:54] <malgar> It seems a current problem, but I'm not sure
[11:55] <UpuWork> I need to go out but can you post a clear image of how its wired up
[11:55] <UpuWork> back in an hour or so
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[11:57] <ulfr_> malgar: If it's a current problem, I'd assume you'd have a voltage drop on the board?
[11:57] <ulfr_> (altho', I'm not quite familiar with what you're doing)
[11:58] <malgar> cionki is building the payload with me. Now he owns the circuit
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[11:58] <malgar> malgar: it seems a voltage drop
[11:59] <malgar> but current usage seems to be a lot lower than max arduino output (40 mA)
[12:00] <ulfr_> Do you have a schematic of the circuit?
[12:02] <daveake> The NTX2 has its own regulator. The voltage powering the NTX2 will have some effect on the output frequency but not much. The main influence is the voltage to the signl input on the NTX2, and that of course is very dependent on the level of the logic supply on your processor board. That's where I would start looking.
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[12:07] <malgar> ulfr_: we have to wait for cionki . I don't have here the circuit
[12:07] <malgar> daveake: really good suggestion
[12:08] <ulfr_> Ah
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[12:14] <cionki> http://s22.postimg.org/cof3gt99d/20140324_130339.jpg http://s22.postimg.org/o21ms0js1/20140324_130352.jpg
[12:15] <malgar> thank you cionki :D
[12:15] <cionki> :)
[12:19] <malgar> ulfr_: look at the pictures posted by cionki
[12:20] <daveake> I believe the Uno has max 50mA from the 3.3V regulator, and that the logic levels are 5V. On that basis ...
[12:21] <daveake> ... 1) The Ublox can easily draw more than 50mA peak, so I'd be looking at providing it with its own regulator. Or, move the NTX2 power from the 3.3V line and put it on the 5V line, so your 3.3V line has more headroom.
[12:22] <daveake> 2) I wouldn't trust USB to provide a nice clean 5V line, so try powering the Uno from a 7V-12V PSU
[12:23] <Laurenceb__> http://www.newyorker.com/online/blogs/borowitzreport/2014/02/gates-spends-entire-first-day-back-in-office-trying-to-install-windows-81.html?intcid=obnetwork
[12:23] <daveake> 3) You're chaining 0V from Arduino to UBlox to NTX2. So any voltage dropped between Uno and UBlox will affect the signal that the NTX2 sees. So connect the NTX2 0V direct to Uno 0V
[12:25] <ulfr_> Makes sense.
[12:25] <daveake> 4) Breadboard.
[12:28] <malgar> what's wrong with bredboard? :D we are using them just to try circuits :P We will use something more serious in the flight config :P
[12:29] <malgar> anyway thanks for the suggestions.. capì cionki ?
[12:30] <craag> Breadboard doesn't always make great connections
[12:30] <cionki> hahhaa understood ! 0v is ok in my opinion :) the main problem lies mostly on usb PowerSupply this evening i will try with an external power supply ;)
[12:31] <craag> Only last week here we had a faulty tracker that was traced to a faulty breadboard hole.
[12:31] <cionki> I will etch a pcb for the launch configuration ;)
[12:32] <craag> That's the best way :)
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[12:32] <daveake> Breadboard is the source of many issues
[12:32] <malgar> do you think that is better to keep gps and transmitter well separated? or doesn't matter
[12:32] <daveake> I'd call it "ProblemBoard"
[12:32] <craag> I tend to develop on stripboard, it's a bit more hassle, but I don't have to worry about bad connections
[12:32] <daveake> Yep me too
[12:33] <daveake> Doesn't take that long to solder up, and then you don't waste 5 times the soldering time chasing some weird problem caused by a dodgy breadboard connection
[12:33] <craag> malgar: More than a couple of inches apart is a good idea
[12:33] <ulfr_> malgar: that'd be a good idea to keep them as far away as possible.
[12:33] <daveake> yeah a couple of inches apart is plenty
[12:34] <daveake> especially as that gps antenna is particulary good at rejecting crap
[12:34] <craag> Sorry SIbot, more than 5.08 cm
[12:34] <malgar> :D
[12:34] <daveake> haha poor sibot sleeping on the job
[12:35] <craag> Doesn't do inches right now
[12:35] <malgar> I also read that some stand alone cameras could jam the gps, right?
[12:35] <daveake> I'm sure it's inching towards being a more capable bot :p
[12:35] <ulfr_> malgar: cheap stuff can interfere
[12:36] <daveake> malgar yes the 808 cameras have this reputation
[12:36] <craag> expensive stuff can too! (eg gopros)
[12:36] <ulfr_> I've seen a lot of cameras (especially dash cams) at work that block gps..
[12:36] <ulfr_> craag: what?
[12:36] <daveake> though there are more variants of 808 than items in a curryhouse menu
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[12:36] <ulfr_> I've never experienced it with the gopros, but everything can and will happen.
[12:36] <craag> Yeah I have an 808 that doesn't jam
[12:36] <daveake> Also the pi cam can, especially with a long cable
[12:36] <craag> or *had*, it's in a tree now
[12:36] <daveake> haha
[12:36] <daveake> best place for it :p
[12:37] <ulfr_> Failure of a recovery? hehe
[12:37] <malgar> are there solutions? 1) separation? 2) shields? 3) cameras without this problem?
[12:37] <ulfr_> a combination of all three
[12:37] <craag> ulfr_: A couple of flights that have had more than one gopro in the same box as the tracker have had issues
[12:37] <ulfr_> start with the third option
[12:37] <ulfr_> craag: fun
[12:37] <malgar> ulfr_: if you have suggestions.. :)
[12:37] <daveake> I flew one once, quite close to a Lassen GPS (yeah yeah, asking for trouble). The GPS did crap out but it came back later - probably due to cold.
[12:37] <craag> seperation is best really.
[12:38] <ulfr_> we had 3 gopros on the CCP flight, but the Spot and the aprs tracker had interference issues
[12:38] <ulfr_> ended up mounting the spot on the outside, on one of the camera booms
[12:38] <craag> Even having the tracker in a different box a few meters down the payload train.
[12:39] <daveake> I've used a gps receiver with gps really close to a Canon, and that was quite slow to get a lock till I put some foil in there
[12:39] <malgar> aluminium?
[12:39] <daveake> (gps chip antenna)
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[12:39] <daveake> yea just kitchen foil
[12:39] <malgar> ok
[12:39] <daveake> it did help
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[12:39] Nick change: BrainDamage_ -> BrainDamage
[12:39] <ulfr_> I've even seen active antennas kill the gps signal of other gps devices
[12:39] <daveake> The payload was pretty small so I didn't have much choice
[12:39] <ulfr_> I do actualyl see the that quite often at work.
[12:39] <ulfr_> actually*
[12:40] <malgar> http://disinfo.s3.amazonaws.com/wp-content/uploads/2011/08/ali21.jpg like this
[12:40] <malgar> I use it everyday in that way
[12:41] <ulfr_> why not a full mask?
[12:41] <ulfr_> or a suite.
[12:41] <malgar> http://www.dos-boot.com/geocaching/conspiracy.jpg
[12:41] <ulfr_> Could probably get them used for cheap on ebay, they were quite popular in the '80s
[12:41] <ulfr_> or that
[12:41] <malgar> LOL
[12:41] <daveake> This was the one where the gps was close to a camera. This was before I added foil http://www.flickr.com/photos/daveake/sets/72157631419200270/
[12:42] <ulfr_> Interesting.
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[12:47] <ulfr_> A bit smaller than my usualy payload. :)
[12:47] <ulfr_> But efficent I guess.
[12:48] <craag> Massive tracker board though :P
[12:48] <daveake> It was the smallest "proper" camera payload I'd managed at the time
[12:48] <daveake> craag haha
[12:49] <daveake> Still have that one
[12:49] <daveake> 2 actually. Keep trying to lose them but they keep coming back
[12:50] <ulfr_> haha
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[12:52] <craag> Hmm quick correlation of tracker board size vs retrieval percentage on recent flights shows that I should make the 70cm ground plane from a single PCB..
[12:53] <daveake> I did suggest that to Upu a while back :)
[12:53] <daveake> We've had surprisingly good results from that round PCB with a stubby antenna stuck out the bottom
[12:55] <ulfr_> they usually work pretty well
[12:56] <craag> One key element is probably that they're actually well matched.
[12:56] <craag> With the handcut wire antennas, we've actually no idea, but have enough headroom to get away with it.
[12:57] <daveake> true
[12:57] <daveake> I think Steve checks all his with an analyser
[12:57] <ulfr_> just remember to turn the antenna facing down ... :P
[12:57] <daveake> We've had flights with some very non-vertical aerials
[12:58] <daveake> Amazing what actually works (well enough)
[12:58] <daveake> Having lots of listeners helps, as does have plenty of headroom
[12:58] <malgar> nobody uses heaters inside the payload, right?
[12:58] <daveake> having
[12:58] <ulfr_> malgar: I usually use heat pads..
[12:58] <daveake> Nobody with any sense, no :)
[12:58] <daveake> oops
[12:58] <daveake> lol
[12:58] <malgar> :D
[13:00] <daveake> The electronics should be fine when cold, and with any reasonable amount of insulation a normal up-burst-down flight won't be up there long enough to get cold inside. Also, if you have a camera or say a Pi generating heat, then it'll be nice and warm (probably not below zero)
[13:00] <fsphil> unless it's overnight
[13:01] <craag> If you have a model B pi in there... it can be well above zero!
[13:01] <daveake> Yup :p
[13:01] <ulfr_> The last flight I did we had -17°C inside the payload.
[13:01] <malgar> model a
[13:01] <malgar> :)
[13:01] <fsphil> I've seen the gpu report -40c before
[13:01] <daveake> Yes a low-power floater is the only situation really where you might want some heat added
[13:01] <fsphil> though the gpu sensor is probably horribly inaccurate that low
[13:01] <daveake> -17 is fine
[13:02] <craag> but then for a floater it's best to design for low temp, rather than add more weight in heating.
[13:02] <ulfr_> but then again, you're probably not dealing with the extreme problems in payload recovery as I was at those particular flights etc.
[13:02] <daveake> The GPU is normally about 20 above ambient
[13:02] <daveake> craag agreed
[13:02] <fsphil> yea, heating is a last resort
[13:03] <craag> Leo waits for the sun to heat his batteries up each morning I believe
[13:03] <daveake> Ironically, the people that normally add heating seem (to me) to be the ones that already have lots of power in there anyway - handheld FM transmitter, camera, etc
[13:04] <craag> Yeah.. remember the massive MIT flight that was reading 55 degrees ambient inside the payload?
[13:04] <daveake> I rememebr PIE1 :/
[13:04] <ulfr_> wow
[13:04] <ulfr_> sun can heat up quite alot as well
[13:04] <daveake> Good job I didn't record temperatures in that one
[13:04] <fsphil> haha
[13:04] <fsphil> lucky the kernel wasn't sending thermal warnings to the uart
[13:05] <daveake> "Enough to start to melt the insulation" is as accurate as I can get on that one
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[13:05] <daveake> that was some squishy foam stuff next to the regulator
[13:06] <daveake> Plus it was left running in the sun for over an hour after landing before I othered to open it
[13:06] <daveake> I felt the heat hit my face when I opened the lid
[13:06] <ulfr_> haha
[13:06] <ulfr_> I guess in those cases you don't need external heating. ;)
[13:06] <daveake> The result of Pi B, linear regulators, and ample battery voltage :p
[13:07] <daveake> The switching reg hadn't arrived in time
[13:11] <ulfr_> hehe
[13:11] <ulfr_> I guess in applications where you have something that emits alot of heat, you have your own heating system anyway
[13:12] <craag> Even without masses of heat, most trackers do perfectly fine for up/down.
[13:13] <malgar> Pu-238 radionuclides
[13:13] <craag> THe lack of convection can actually cause overheating on the high power stuff
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[13:15] <ulfr_> Thats why ground testing and temperature readings are useful. :)
[13:16] <ulfr_> which reminds me, I still haven't done that on the latest payload.
[13:18] Nick change: DL7AD_ -> DL7AD
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[13:37] <amell> hearing rumours that mh370 has been found. also that 200kg of lipos were on board. Hmmmm.
[13:42] <craag> News conference at 1400
[13:43] <amell> yup. the PM is giving it. not normal.
[13:43] <gonzo_> nope, that would be a HAB from the USA
[13:44] <amell> In other news, B-41 is still AWOL :)
[13:44] <mfa298> or is that a news conference to tell us we're now in WWW3 with Russia
[13:45] Action: mfa298 waves at the spy bots from GCHQ & NSA
[13:45] <daveake> haha
[13:45] <daveake> Well, we'll find out first if bits start turning up on ebay
[13:45] <amell> B41, if still afloat, would be coming out of afghanistan and entering Tajikistan
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[13:49] <daveake> amell http://www.lloydsloadinglist.com/freight-directory/news/freight-among-theories-in-mh370-mystery/20018104997.htm?source=ezine&utm_source=Lloyd%27s+Loading+List+Daily+News+Bulletin&utm_campaign=80da7a1a89-Fri_21_March3_21_2014&utm_medium=email&utm_term=0_1a5c244239-80da7a1a89-256747097#.UzA3yPl_t8E
[13:49] <daveake> oops sorry for url
[13:49] <daveake> Buy thos Lithium batteries while you still can :/
[13:55] <gonzo_> wait for the knee jerk legislation banning then from use/carriage in the air. Screwuing us and the RC boys, due to poor wording
[13:56] <eroomde> watch this video about the design and operation of spirit and opportunity, if you've yet to
[13:56] <eroomde> https://www.youtube.com/watch?v=Y7ZBLklsUys
[13:58] Action: fsphil notes length and bookmarks it
[14:04] <malgar> nice
[14:04] <malgar> tnx
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[16:32] <Laurenceb__> http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=51498
[16:40] <Geoff-G8DHE-M> Excellent analysis of the Inmarsat "pings" here http://www.airtrafficmanagement.net/2014/03/mh370-satcoms-101/
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[16:55] <SpeedEvil> http://www.pprune.org/showthread.php?t=535538&page=369 is a great thread
[16:58] <SpeedEvil> Also - he's somewhat making stuff up. 'unlikely more accurate than 100 miles'
[16:59] <SpeedEvil> The subsatellite point-track is about 40 degrees of earth along the equator. This adds up to about 4000km.
[17:00] <mikestir> is he not referring to distance from the satellite, which would be quantised according to how granular their timing advance measurement is?
[17:00] <SpeedEvil> The satellite is 35000km over the subsatellite point.
[17:01] <mikestir> in the same way that GSM timing advance gives you distance to BTS in 500m intervals
[17:01] <SpeedEvil> At the orientation, I make it that you've got - with a 40000 feet positional uncertainty - only a bit more than 100000 feet or so (+-10 miles)
[17:01] <SIbot> In real units: 40000 ft = 12 km
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[17:02] <DL7AD> 30000 ft
[17:02] <SIbot> In real units: 30000 ft = 9 km
[17:02] <DL7AD> 3000ft
[17:02] <SIbot> In real units: 3000 ft = 914 m
[17:02] <DL7AD> rofl
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[17:03] <DL7AD> 13 miles
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[17:03] <SpeedEvil> There is no special reason to suspect that the 'timing advance' is not measured to within significantly better than a microsecond
[17:03] <mikestir> do we know if the system being used was TDMA or CDMA?
[17:05] <myself> there's also no reason for the network to preserve that information or even to pass it out of the transponder chipset unless it's in some diagnostic mode
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[17:06] <SpeedEvil> myself: Well - unless inmarsat are making shit up - it is passed out
[17:07] <myself> which honestly I'm surprised by. I guess satellite networks have a lot fewer customers than cellular networks, and it might not be such an overwhelming torrent of data.
[17:08] <mikestir> well for tdma it's required to ensure you don't slip into the next time slot
[17:08] <myself> and for cdma it's required to make sure the chips line up
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[17:10] <myself> I guess SpeedEvil's point is that *if* the system is reporting and logging timing advance information, it ought to be doing so at greater precision than is being talked about, and that's weird.
[17:11] <mikestir> the control channel bitrate is going to be relatively low though, so I guess you'd expect a correspondingly lower timing resolution
[17:11] <myself> It's conceivable that the system has significantly relaxed timing compared to a terrestrial cellular network, owing to fast-moving terminals, low terminal density, etc, and they simply might not measure it as precisely as we're expecting, because they don't need to
[17:12] <SpeedEvil> I'm basically just pointing out that a-priori arguments that 'must be >100km' - when there is no good reason for that do not stand up
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[17:34] <flyer__> Hey guys I have a question??
[17:35] <Geoff-G8DHE-M> You will have to ask it before we can answer!
[17:35] <flyer__> Do I need to create a separate document for the flight or will the payload doc suffice??
[17:35] <flyer__> i.e. for the actual flight??
[17:37] <Geoff-G8DHE-M> Best to have a Flight Document and then a payload config for each seperate payload
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[17:38] <Geoff-G8DHE-M> For testing you just need Payload config's then nearer the time when your ready for a flight create the Flight document
[17:39] <flyer__> Alright thanks
[17:39] <flyer__> Do I have to make any significant changes??
[17:39] <Geoff-G8DHE-M> to what ?
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[17:40] <flyer__> compared to the payload doc.
[17:40] <flyer__> Cause I won't be making any more modifications before I fly it
[17:40] <Geoff-G8DHE-M> If you try generating one then you will see whats needed, they ask for different things
[17:40] <flyer__> cool
[17:40] <mattbrejza> a flight doc specifies which payloads are flying, when youre flying and a couple of other things
[17:41] <Geoff-G8DHE-M> Have you actually tested a payload yet ?
[17:41] <mattbrejza> that way noone can modify your payload doc, it appears in the calendar
[17:41] <flyer__> Thanks matt
[17:41] <mattbrejza> and it collates all the data from a flight together
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[17:57] <DL7AD> is anyone able to speak chinese? :P
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[17:59] <Geoff-G8DHE-M> Wo( xia(ng bù huì zài
[18:00] <DL7AD> Geoff-G8DHE-M: wrong encoding
[18:00] <DL7AD> :D
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[18:01] <Geoff-G8DHE_> Humm it cut me off
[18:01] <daveake> I think I preferred morse :p
[18:01] <DL7AD> you did the wrong encoding ^^
[18:01] <Geoff-G8DHE_> probably!
[18:02] <Geoff-G8DHE_> Never have been good at any sort of language!
[18:02] <DL7AD> http://ssdv.habhub.org/images/2014-03-24--16-46-32-D-3-A51.jpeg?u=596 thats an image from my tidy desk ;)
[18:02] <Geoff-G8DHE_> Looks good!
[18:03] <mattbrejza> ssdv.habhub is now an image hosting place? :P
[18:03] <mattbrejza> soon to overtake imgur...
[18:03] <DL7AD> :D
[18:04] <daveake> Lot more reliable :/
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[18:04] Nick change: Geoff-G8DHE_ -> Geoff-G8DHE-M
[18:05] <DL7AD> could someone tell him he's on the incorrect frequency? :P http://aprs.fi/#!mt=roadmap&z=8&call=a%2FBH8DVB-10&timerange=10800&tail=10800
[18:06] <ulfr_> Heh.
[18:07] <ulfr_> What's the aprs freq. in asia?
[18:07] <ulfr_> .8?
[18:08] <ulfr_> Japan seems to use .64 and .66
[18:09] <ulfr_> somehow it would have been easier if every country would have just sticked with .8 or .39
[18:10] <daveake> now that's just silly talk :p
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[18:21] <fsphil> DL7AD: hehe, how long did that take to transmit? :)
[18:22] <DL7AD> which one Full HD or just HD?
[18:22] <fsphil> they're all full screen on my laptop
[18:22] <DL7AD> rofl....
[18:22] <DL7AD> 1920*1072 => 46minutes
[18:23] <DL7AD> 1280*720 => 24 minutes
[18:23] <fsphil> that at 600 baud?
[18:23] <DL7AD> quality 50%
[18:23] <DL7AD> yes
[18:24] <daveake> Almost enough time after taking it before you land :p
[18:24] <daveake> Worth trying in a floater tho
[18:24] <fsphil> yea
[18:25] <mattbrejza> have an uplink so you can tell it what photo to downlink in hq
[18:26] <daveake> ideal
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[18:26] <fsphil> if there was a reliable uplink I would have it re-transmit packets
[18:27] <fsphil> that where not received on the ground the first time
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[18:29] <fsphil> or compress it as a webp image, send it down in blocks -- it wouldn't be tolerant of lost data but if missing bits could be fetched then it would work well
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[18:33] <DL7AD> now im doing the same at 1200baud
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[18:34] <fsphil> nice
[18:35] <fsphil> at this size even 1200 looks slow
[18:36] <DL7AD> fsphil: unfotunately yes :(
[18:37] <daveake> multiple tx ftw
[18:37] <daveake> or powwwwerrr
[18:37] <DL7AD> http://puu.sh/7HRuw/7f826a873c.png
[18:38] <DL7AD> 8x NTX2B @ 1200 bit/s => 9600 bis/s => Full HD image in 3 minutes
[18:41] <mikestir> if you can pick your image you could just downlink it at 869 MHz with more power and keep within the 10% duty cycle limit
[18:41] <malgar> !!!
[18:42] <malgar> multiples ntx2b?? :O wtf
[18:44] <mikestir> has anyone done anything with lots of rx antenna gain on 2.4 GHz? I'm not thinking WiFI here, more like a bespoke PSK link of the sort that's been used for high speed packet on 23 and 13 cm
[18:44] <daveake> mikestir what's the duty cycle averaging period? 1 hour?
[18:44] <mikestir> yes 1 hour
[18:44] <daveake> ta
[18:45] <mikestir> but 500 mW and up to 250 kHz to play with
[18:45] <daveake> yep
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[18:46] <daveake> of course you could have a 2nd transmitter <cough> which happens to start up after the first one switches off <cough> not the same one at all <cough>
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[18:46] <mikestir> I assume you'd need another antenna as well though
[18:46] <mikestir> I mean, if you wanted to get rid of that bad cough
[18:46] <daveake> of course :)
[18:47] <daveake> Not that this stuff is specified to that detail anyway
[18:47] <mikestir> well I did discover that frequency hopping is explicitly ruled out
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[18:47] <mikestir> so you can't just hop over the 10 25 kHz channels and stay on all the time
[18:47] <daveake> sure
[18:49] <DL7AD> the last image took 11 minutes
[18:49] <DL7AD> 1280*720 @ 1200 baud
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[19:02] <DL7AD> evening KT5TK ;)
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[19:25] <craag> unofficial heads up - possible latex pico flight tomorrow morning
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[19:56] <jiffe98> so I was looking at the Android HAB Modem and Tracker app for android and that looks pretty kick ass
[19:56] <jiffe98> I was using aprsdroid with bluetooth serial integration to my kenwood tnc
[19:57] <DL7AD> https://www.kickstarter.com/projects/2135028730/piscreen-a-35-tft-with-touchscreen-for-the-raspber?ref=footer
[19:57] <jiffe98> would be nice to do something similar with this
[19:57] <Upu> I've seen that DL7AD and I don't think he's going to be able to delivery
[19:57] <Upu> deliver
[19:57] <Upu> he's on #hackvana
[19:58] <DL7AD> Upu: well.... why do you think hes not able to do it
[19:58] <Upu> he's going to assemble them himself
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[19:58] <Upu> or at least start
[19:59] <Upu> I'll give him a week of doing that all day before he decides to slit his wrists
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[20:00] <craag> jiffe98: What would you hook it up with?
[20:01] <LeoBodnar> it's shit
[20:01] <jiffe98> craag: I have a serial to bluetooth adapter on the tnc
[20:02] <craag> THat wouldn't be any use with rtty
[20:02] <LeoBodnar> and anybody who uses term "shield" should be expelled off the internet
[20:02] <myself> how do you feel about "cape"? ;)
[20:03] <daveake> I want a shield to interface to the cloud :p
[20:03] <LeoBodnar> i can barely tolerate it.
[20:03] <jiffe98> craag: no the tnc handles all that and aprsdroid would take the provided coordinates and map it
[20:03] <LeoBodnar> only because it reminds me of Delboy and Rodney
[20:03] <daveake> ha
[20:04] <mattbrejza> so it has to output the screen data over the gpio? doesnt sound like the best idea
[20:04] <mattbrejza> (slow, or uses all cpu)
[20:04] <craag> jiffe98: Yes, I'm aware of how bluetooth tncs work. I'm wondering what your idea is with the hab tracker and modem app
[20:04] <mattbrejza> at a guess the bloke who programmed it is too busy to add lots of extra features to it
[20:06] <daveake> sounds like a fair guess
[20:06] <mikestir> I wrote a framebuffer driver for a 320x240 greyscale display connected to a PC parallel port about 10 years ago. It was for a car computer. It was indeed a massive CPU hog
[20:06] <jiffe98> craag: I'm interested in the rest of what it has to offer like the offline mapping and reporting with the aprs input
[20:06] <mfa298> doing the display stuff over gpio does look like a bad idea. I was assuming it would do something more sensible for display but there's nothing obvious on the pcb other than gpio and connector for the lcd
[20:08] <daveake> that tft will be blown into the water when the official RPi one comes out
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[20:09] <mattbrejza> is there a screen connector like the camera connector?
[20:09] <daveake> yes
[20:10] Action: mfa298 wonders how much the sequence entering data on the piscreen was edited
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[20:11] <aadamson> yeah I got boards today... might get a picture or 2 up later... trying to build the lipo/solar/usb power first, processor next and single cell last :)
[20:12] <mfa298> the phrase "video speed increased" on some of those clips looks omminous.
[20:12] <daveake> hah
[20:12] <Lunar_Lander> hello
[20:14] <mfa298> hmmm, and I think the Amstrad 1512 managed packman a bit faster than that (and the 286 definetly did)
[20:16] <jiffe98> I can understand not wanting to go in that direction, just liked the idea behing the app
[20:16] <jiffe98> I don't know if there's source available for it?
[20:17] <mattbrejza> who knows...
[20:17] <mfa298> 'tis a bit of a mystery as to who wrote it isn't it :p
[20:18] <mattbrejza> you might be better off making a new app if you just want a aprs parser which dumps position on a map
[20:18] <jiffe98> heh
[20:19] <jiffe98> I'd be happy to dig in a bit myself
[20:26] <jiffe98> offline mapping would definitely come in handy, there's not a lot of cell signal in rural south dakota
[20:27] Action: craag reckons jiffe98 should look at the developer name
[20:28] <jiffe98> craag: I'm well aware mattbrejza is the developer :)
[20:28] <craag> Take a look on his github ;)
[20:28] <jiffe98> you rock :)
[20:29] <mattbrejza> if you wanted a quick and dirty thing, get some bt tnc code working, then attach that to the mapsforge sample app
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[20:44] <flyer__> Does anyone know why our adafruit GPS could suddenly be giving all zeros, even though it is getting a fix. The radio is not transmitting the coordinates
[20:44] <Upu> oh don't use one of those
[20:44] <Upu> they stop working at 27km
[20:44] <flyer__> we are only going unto 25km
[20:44] <craag> hello flyer__
[20:44] <Upu> what balloon ?
[20:44] <craag> 100g
[20:45] <Upu> border line
[20:45] <Upu> is this all zero's passing through your code or just the raw output of the GPS ?
[20:45] <flyer__> all
[20:46] <craag> coming out of the adafruit too flyer__ ?
[20:47] Action: craag -> PM
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[21:37] <flyer__> think its the gs
[21:37] <flyer__> gps
[21:37] <flyer__> i dont get any raw data
[21:37] <flyer__> !!!
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[21:45] <mikestir> if you're not getting any data, how do you know it's got a fix?
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[21:48] <jiffe98> mattbrejza: yeah I might have to do that, I really like your app tho
[21:49] <mattbrejza> :D thaks
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[22:50] <craag> No early morning launch tomorrow - dead adafruit gps.
[22:50] <daveake> best sort :/
[22:50] <daveake> just nothing from it?
[22:51] <craag> nothing at all on the pin
[22:51] <daveake> I have some cheapo ebay modules which sometimes Tx sometimes not when switched on
[22:51] <craag> 'lock' led flashes for a bit to indicate acquiring, then goes intermittent to indicate it has lock
[22:52] <craag> but nothing on either rx or tx pins
[22:52] <craag> tried rebooting it many times.
[22:52] <Upu> can't you swap it out for one of mine ?
[22:52] <craag> Upu: I tried! Took one along and everything. But they don't want to change the setup at this stage.
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[22:53] <craag> He would have to add the flight mode code in.
[22:56] <craag> So hopefully flyer__ will be launching with on thursday instead
[22:56] <flyer__> yeah once the gps comes in
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[00:00] --- Tue Mar 25 2014