highaltitude.log.20140331

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[00:22] <g0pai_ian> Lash a pot between VCC and Ground and the wiper to TXD and when the frequency is right, then you can measure the potentiometer for fixed resistor values to obtain the desired frequency offset.
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[00:22] <DL7AD> DL7AD: a
[00:23] <g0pai_ian> Not quite that simple, but it will at least identify the nature of the problem.
[00:25] <g0pai_ian> Gone to bed I guess. Gnite all.
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[00:34] <amell> qbit: 390-10 = 380
[00:35] <amell> yay, just finished setting up a new aws cloudformation. now bed.
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[02:14] <qbit> lol amell
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[08:03] <craag> Morning all from the new forest
[08:04] <mattbrejza> no sign of gdp yet...
[08:04] <fsphil> what happened the old one?
[08:05] <mattbrejza> they cut it all down
[08:05] <mattbrejza> not much forest left
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[08:11] <DL7AD_mobile> Morning
[08:15] <gonzo__> craag, radio is on ready for you. What's the freq?
[08:15] <mfa298> the email says: 434.550 Mhz USB 7n2.
[08:15] <mfa298> name is GDP but no shift mentioned
[08:17] <craag> It should be in dlfldigi
[08:18] <craag> We're here at the launch site, no sign of the launch team yet though.
[08:20] <mfa298> email didn't specify GMT/BST/ISH
[08:20] Action: mfa298 wonders if someone forgot to set a clock
[08:20] <craag> UTI
[08:20] <craag> university-team-ISH
[08:21] <UpuWork> Students lol
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[08:22] <DL7AD_mobile> The solution is to get rid of the sumner time
[08:24] <fsphil> the british already did that
[08:24] <fsphil> kept the time change however
[08:25] <DL7AD_mobile> When. Wasnt the time changed some days ago in uk?
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[08:28] <amell> I thought GDP was supposed to launch this morning. nothing on snus
[08:29] <craag> amell: They are.... have yet to arrive at the launch site
[08:29] <amell> craag: ah. students are not known for timekeeping. Hope you have a flask of brew with you.
[08:31] <DL7AD_mobile> Cheers
[08:31] <cm13g09> craag: Do I get the feeling we're redefining ISH this morning?
[08:31] <craag> Hey not all of us - two students were here on time!
[08:32] <mfa298> you should have taken balloon/gas/tracker with you and launched something whilst waiting for them.
[08:33] <cm13g09> meanwhile I have a rig with no antenna :P
[08:33] <cm13g09> because I forgot to bring the ant with me when I came back from Essex yesterday :P
[08:33] <craag> mfa298: Predicted landing is a little too far for my liking..
[08:33] <DL7AD_mobile> :)
[08:34] <amell> wheres the prediction?
[08:34] <craag> http://predict.habhub.org/#!/uuid=8a8ffee5ad8f819e8e7302abf594609283e6ad46
[08:34] <amell> snap
[08:34] <amell> Swindon.
[08:34] <cm13g09> ah, a little far North
[08:34] <mikestir> lol
[08:35] <craag> Plus it's swindon :P
[08:35] <amell> 14k burst?
[08:35] <gonzo__> three of you is more than enough to launc
[08:35] <craag> amell: That's a guess, they have no idea
[08:35] <fsphil> uh-oh
[08:36] <amell> so basically, you have no idea where its going to land?
[08:36] <craag> amell: Yep :)
[08:36] <mfa298> maybe a foil burst then, you'd have a chance of launch, track and recover before they're ready
[08:36] <craag> GGDP has arrived.
[08:36] <craag> *GDP
[08:36] <fsphil> you should do a GBP and USD launch
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[08:58] <tweetBot> @thecraag: GDP prepping for launch #ukhas http://t.co/Qi8yBGl9WG
[09:03] Action: mfa298 wonders who in that picture is providing the most help.
[09:03] <UpuWork> nice pony
[09:04] <cm13g09> UpuWork: if you ask me, it needs to stop horsing about and launch something :P
[09:04] <cm13g09> s/it/they/
[09:04] <cm13g09> (not awakeyet)
[09:05] <amell> oh, so everyone has arrived now? gosh.
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[09:09] <craag> LAUNCH
[09:09] <craag> oops
[09:10] <mfa298> that's a strong signal on a crap antenna (at this end)
[09:10] <DL7AD_mobile> ?
[09:10] <craag> altitude isn't updating.. just got a 2D lock
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[09:11] <amell> looks like it came down by 1m
[09:13] <amell> youre good now phew
[09:14] <mfa298> doesn't look like a particularly fast ascent rate though
[09:14] <amell> I dont think its fully locked on 3D
[09:14] <mfa298> although that's hard to tell with only three datapoints to work with
[09:15] <amell> 558m
[09:16] <mfa298> 09:12:22 382m, 09:12:39 398m
[09:16] Action: cm13g09 is in the office, missing the fun!
[09:16] <mfa298> 09:15:14 558m
[09:17] <mfa298> those are the first time the hieghts have been reported
[09:18] <mfa298> I make that around 1m/s ascent rate
[09:18] <amell> strange. altitude is not updating frequently
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[09:19] <craag> Yeah adafruit GPS :(
[09:19] <mfa298> amell: the raw telem is still showing 558m
[09:19] <craag> mfa298: So do we
[09:19] <craag> Looking at about a 3h flight
[09:19] <amell> 877m
[09:19] <mfa298> or float ?
[09:19] <craag> possibly
[09:20] <craag> but 70g payload so not likely
[09:20] <amell> how often does this adafruit update?
[09:20] <amell> 921m
[09:20] <gonzo__> is this a pico foil?
[09:20] <craag> position updates every string
[09:20] <mfa298> lat and long are updating all the time just not altitude
[09:20] <craag> but it's struggling to hold 3d lock
[09:20] <craag> gonzo__: 100g hwoyee
[09:20] <gonzo__> rr
[09:22] Action: amell thinks sp3osj is looking to compete with Leobodnar
[09:22] <mfa298> how heavy is the habduino that appeared to float a few weeks ago ?
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[09:31] <DL7AD_mobile> 20000ft
[09:31] <SIbot> In real units: 20000 ft = 6 km
[09:32] <mfa298> interestingly with the payload sending +5059.6621, -142.2820 dl-fldigi can work out the latitude but not the longitude - that's the first time I've seen it almost do the right thing with ddmmm.mmm format data
[09:32] <mfa298> it's also a very fady signal
[09:32] <amell> not many receivers
[09:32] <fsphil> monday morning
[09:33] <fsphil> this could float
[09:34] <cm13g09> The question that everyone is asking: "Will it float?"
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[09:35] <amell> Will it burst?
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[09:36] <fsphil> it could vanish and we never know
[09:39] <mfa298> just grepped the logs, the habduino that floated was 1.2KG payload on 600g balloon - not sure if that helps workout if this could float.
[09:40] <fsphil> it's a bit trickier with the 100g's but it's been done
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[09:48] <G4AIU-Eugene> Good morning all
[09:48] <fsphil> morn!
[09:48] <G4AIU-Eugene> morning fsphil
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[09:51] <Hade> Do you have a project web page for the GDP HAB?
[09:52] <craag> Hade: No
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[09:52] Action: amell thinks ebay isnt what it was. half the stuff i search for is in china.
[09:52] <cm13g09> amell: sad but true
[09:53] <fsphil> annoying how many things appear obviously from china when you click on the "only from uk" box
[09:53] <amell> not sure how they manage that
[09:53] <fsphil> fake address
[09:54] <fsphil> it'll be listed as despatching from somewhere in england
[09:54] <amell> loads of the items are way overpriced. like 2-3 times retail - whats the point of that
[09:54] <amell> just look at the search results for fluke 115 - its depressing
[09:55] <malgar> nnex 2 ICAO says that the balloons have to be visible by radars bewtween 200 MHz and 2700 MHz. How can I be sure about this?
[09:55] <amell> malgar: you have to build a radar scanner rig to test
[09:57] <x-f> malgar, doesnt that apply only to medium and heavy class unmanned free balloons?
[09:57] <malgar> x-f: mmh maybe
[09:57] <gonzo__> oh, bosbomde down, nice
[09:58] <G4AIU-Eugene> Is it just my set-up? my "elevation" is reading -0.3
[09:59] <mfa298> G4AIU-Eugene: as the balloon is sending ddmmm.mmm format what dl-fldigi works out will probably be wrong.
[09:59] <gonzo__> I have had the opposite recently. A HK item, that was shipped from within the uk
[09:59] <fsphil> ooh not heard of that one before gonzo__
[09:59] <mattbrejza> rather helpfully the gdp use the same frequency as someone on the weekend so the radio is already tuned and started to pick up automatically :D
[09:59] <fsphil> love it when that happens
[10:00] <G4AIU-Eugene> Many thanks- mfa298
[10:00] <mattbrejza> also helped by java decoder was running
[10:00] <mattbrejza> fldigi hasnt got it
[10:01] <gonzo__> would be nice to have the autotune for sdrs, so it will find sigs automagically. Though that could be a prob with the amoutnt of crud in the LPD band
[10:01] <mattbrejza> my decoder looks for fsk signals
[10:01] <mattbrejza> and it can always try to decode more than one potental signal at once
[10:02] <fsphil> what is it looking for?
[10:02] <mattbrejza> it looks for peaks
[10:02] <mattbrejza> then sees whether they are alternatively high and low
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[10:03] <gonzo__> the funcube dash looks for a signal peak
[10:03] <gonzo__> not sure that would work for us
[10:03] <ibanezmatt13> GDP work this time?
[10:03] <amell> ibanezmatt13: yes, but some issues with holding 3D lock on the GPS
[10:03] <gonzo__> though you can set a band to search. So could set it for the rough freq range that a payload is expected within
[10:04] <amell> infrequent altitude updates.
[10:04] <ibanezmatt13> ah right
[10:04] <mattbrejza> it needed a prod to release but other than that it filled and let go by itself
[10:04] <ibanezmatt13> excellent
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[10:04] <gonzo__> there is the autotuve/track in fldigi, but that has to be following a signal in the first place
[10:04] <amell> passing over stonehenge now. That would make a nice picture.
[10:06] <gonzo__> wonder what the record is for number of airfields overflown in one flight?
[10:06] <mattbrejza> probably Bxx due to flight time
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[10:08] <mfa298> there's something near here that keeps giving large bursts of qrm on the frequency
[10:08] <mattbrejza> mfa298: must be pretty local to you, nothing on astra
[10:09] <mattbrejza> not sure if floating, falling or dodgy gps :/
[10:10] <mfa298> I'm mostly decodign still although I'm not sure id want to find the signal in the noise.
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[10:11] <mattbrejza> it should be pointed out there is a oneway valve in the neck of this balloon
[10:11] <mfa298> there's been a few steps down in the altitude so could be burst - or leak
[10:12] <mattbrejza> descent too slow for burst
[10:12] <mfa298> dropped ~500m from it's peak so I'd guess it's on the way down.
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[10:13] <mfa298> I'd guess at decent af ~0.5m/s from the graphs
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[10:15] <amell> wonder if its visible from the car
[10:21] <mfa298> hmmm, bug in the code with a quick visit over the USA to the north pacific ocean
[10:21] <UpuWork> eg
[10:21] <UpuWork> eh
[10:21] <UpuWork> 2300 meters ?
[10:22] <fsphil> it's not a burst, looks like it's leaking
[10:22] <UpuWork> fail code ?
[10:22] <fsphil> mattbrejza mentioned there was a valve in the neck
[10:22] <UpuWork> ok
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[10:25] <mfa298> looking at my dl-fldigi it looks like long went from -146.9131 to -14233.0000 to -146.9324 although it's possible that was a bad packet - I've not been watching it closely
[10:26] <mfa298> but all of those were followed by ,1267 for the altitude
[10:29] <UpuWork> is the altitude graph using 8 bits or something ?
[10:30] <fsphil> that is rather annoying
[10:30] <mfa298> I think the blame is being put on an adafruit gps and assuming it's not keeping a 3d lock
[10:31] <gonzo__> lost sigs here
[10:31] <craag> Hello all
[10:31] <craag> Yes adafruit GPS doesn't like 3D lock
[10:31] <fsphil> definitly dropping then
[10:32] <G4AIU-Eugene> lost sigs here also
[10:32] <mfa298> pretty much gone here as well
[10:32] <craag> Hopefully they've still got it in the chase car
[10:32] <mfa298> although it looks like it just returned
[10:33] <mfa298> have they done something odd with the payload antenna - it seems to be quite fady
[10:33] <gonzo__> still just a trace there on the omni, but lost on the yagi. So probably just over my local horizon now (The yagi is lower down)
[10:33] <fsphil> this is coming down slow enough to catch
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[10:35] <mfa298> looks to be totally gone now
[10:38] <cm13g09> lol at the mailing list post entitled "Manchester"
[10:38] <mfa298> the fun will be guessing where it's going to touch down.
[10:38] <mfa298> I suspect the chase team may have gone too far north. ground height looks to be ~100m around there
[10:43] <craag> What were the glitchy positions?
[10:44] <mfa298> this is what and copy/pasted from dl-fldigi but I don't know if it's a good string
[10:44] <mfa298> $$$GDP,337,10:20:48,+5114.1132,-14233.0000,1267,11,6280,770,087309*4141
[10:45] <craag> They've found the balloon
[10:46] <craag> Recovered :)
[10:47] <craag> Balloon was still inflated - they agree it's probably a leak in the valve.
[10:49] <gonzo__> a resonably first flight for them then
[10:49] <gonzo__> reasonable
[10:49] <craag> Yes :)
[10:49] <craag> They're planning to launch again later in the week
[10:49] <craag> Once they've fixed the valve
[10:52] <craag> I've got some footage of the launch, will put on youtube later.
[10:52] <gonzo__> what is the valve? An active vent?
[10:53] <craag> No, 1 way valve so they can fill and then just cut the hose with nichrome wire to release.
[10:53] <gonzo__> what's the reason for that then?
[10:53] <craag> It's an automatic launcher
[10:54] <gonzo__> interesting
[10:54] <craag> from last time: http://t.co/8B5q8QdXWq
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[10:56] <cm13g09> craag: interesting method!
[11:00] <amell> whats wrong with a belt and braces approach with cable ties?!?
[11:00] <amell> higher complexity = higher probability of problems.
[11:01] <craag> Wow I just got sent my first ever MMS
[11:01] <craag> It's of a familiar-looking balloon stuck in barbed wire :)
[11:09] <mikestir> amell: I think the auto-launcher is the project rather than the flight itself
[11:10] <craag> ^^ yep. The flight is just to prove it works.
[11:12] Action: cm13g09 goes home to deal with BT
[11:13] <Reb-SM3ULC> cm13g09: good deal?
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[11:26] <Laurenceb__> LeoBodnar: ping
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[11:35] <cm13g09> can't say its a great deal.
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[11:36] <cm13g09> but it's about right for what I'm going Rob
[11:36] <cm13g09> *to be paying
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[11:49] <LeoBodnar> yo
[11:50] <LeoBodnar> Laurenceb__:
[11:55] <Laurenceb__> other channel lol :P
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[12:23] <cm13g09> I had fun this morning, encountered something on openWRT called ubox kmodloader. mistook it for ublox...
[12:23] <cm13g09> couldn't work out why I couldn't find anything online for it :P
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[12:28] <fsphil> hab getting into your brain
[12:28] <cm13g09> fsphil: clearly!
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[12:57] <M0TVU> hi
[12:58] <M0TVU> can anyone feel the the link to the hab shop thingy and the promo code please. Need a ublox wossit
[12:59] <M0TVU> feel the link?
[12:59] <M0TVU> tell me the link maybe?
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[13:07] <cm13g09> Sigh... EE 4G = 70Mbps, TalkTalk DSL = 4Mbps....
[13:09] <fsphil> that didn't take long :)
[13:09] <fsphil> 4G is pricy though
[13:09] <mattbrejza> is the same on giffgaff :)
[13:09] <fsphil> unless they're doing an unlimited service now?
[13:09] <fsphil> giffgaff apparently still do unlimited
[13:10] <mattbrejza> no tethering though
[13:10] <fsphil> ah yes
[13:10] <mattbrejza> (but you can tether on limitied ones)
[13:10] <cm13g09> fsphil: I'm on 11GB/month
[13:10] <cm13g09> of data
[13:10] <cm13g09> and a phone
[13:10] <cm13g09> on EE
[13:10] <mattbrejza> useful for when the building with all the routers in it loses power
[13:10] <fsphil> 11GB/month on a 70MB/s connection?
[13:10] <cm13g09> for <£45
[13:10] <cm13g09> yeah
[13:11] <cm13g09> 11GB/mo 70Mbps :P
[13:11] <fsphil> so you could use up your entire allocation in less than an hour. nice
[13:11] <cm13g09> doesn't last long ;)O
[13:11] <cm13g09> meanwhile, my Talktalk line is going to be 4Mbps....
[13:11] <cm13g09> (BT still aren't here)
[13:11] <fsphil> there is that
[13:12] <cm13g09> If I get any more than 6Mbps out of it I'll be shocked...
[13:13] <fsphil> the one advantage of where I live is I get pretty good internet speeds
[13:13] <fsphil> both through the phone line and mobile
[13:13] <cm13g09> fsphil: see the PM I sent you
[13:16] Nick change: ghoti_ -> ghoti
[13:21] <gonzo__> I could never understand why anyone would want a fast connection with such limited allowance
[13:21] <gonzo__> unless it's just a trap for the unwary
[13:21] <fsphil> phone company, so definitly a trap
[13:22] <gonzo__> as much as the unlimite vs fair useage
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[13:39] <Reb-SM3ULC> cm13g09: you actually get 70 Mbit or?
[13:40] Action: Reb-SM3ULC got a sales-call were the saleswomen who tried to sell 4G thought 4G was 4GB/month...
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[13:49] <cm13g09> Reb-SM3ULC: amazingly yes
[13:50] <Reb-SM3ULC> cm13g09: very nice
[13:50] <cm13g09> I wish BT would hurry up and do this install
[13:51] <BalYOLO> Planning a flight tomorrow guys
[13:51] <BalYOLO> flight doc: 7012be99755601f553a112c20fc0644b
[13:52] <UpuWork> approved BalYOLO
[13:52] <BalYOLO> Thank you!
[13:53] <BalYOLO> Tracker uploading well, will check again tomorrow morning
[13:54] <UpuWork> excellent good luck
[13:54] <UpuWork> put more gas in :)
[13:54] <BalYOLO> Haha, yes!
[13:55] <g0pai_ian> craag: Did the consultant get invited to the Antelope for an early lunch, across the road from where the GDP_chase car was parked? Doubtless discussing future uprgades to use H2 for better performance. So much more practical/entertaining than addressing the GPS issues . . . :-) Call me cynical!
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[13:55] <R6DT> hallo SP3OSJ
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[13:59] <DL7AD> hiho
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[14:06] <DL7AD> ping R6DT
[14:07] <R6DT> Hallo Sven DL7AD
[14:08] <DL7AD> did you receive the balloon R6DT?
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[14:09] <R6DT> I receive the balloon tx: de SP3OSJ Loc: LN04el
[14:10] <DL7AD> R6DT: RTTY or APRS?
[14:10] <R6DT> cw
[14:10] <DL7AD> R6DT: do you know how to decode RTTY?
[14:10] <R6DT> NOT
[14:11] <DL7AD> http://ukhas.org.uk/guides:tracking_guide:russian heres a russian guide
[14:11] <DL7AD> you need this program to decode rtty: http://habhub.org/files/dl-fldigi/dl-fldigi-DL3.1-windows-2abd6a7.exe
[14:11] <R6DT> ok, thanks
[14:13] <DL7AD> R6DT: tell me, if you have problems to configure the program ;)
[14:15] <R6DT> no problem
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[14:20] <sp2ipt> R6DT: would be great if you'd connect dl-fldigi - this flight is fantastic :)
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[14:22] <R6DT> Hear is already weak signals
[14:24] <sp2ipt> R6DT: depending on your antenna situation it is possible to receive it abt. 400 km away with only a normal vertical antenna
[14:25] <sp2ipt> R6DT: I was using a clone of Diamond X510 (length about 6 m) and YU1AW preamplifier (BFP196W transistor) and dot 390 km reception
[14:25] <R6DT> horizontal polarization
[14:26] <sp2ipt> no, vertical
[14:26] <R6DT> not vertical
[14:26] <sp2ipt> any usual vertical will be better than normal tropo antenna
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[14:27] <sp2ipt> using tropo setup you will get shorter range, don't forget to turn on the LNA :)
[14:32] <sp2ipt> gotta go, bye
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[14:40] <craag> g0pai_ian: Unfortunately the consultant had to go and do some actual paid work! I didn't chase.
[14:41] Nick change: Scorpia_ -> scorpia
[14:47] Nick change: Hes_ -> Hes
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[15:43] <K5KXF> Anybody home?
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[15:44] <K5KXF> looking for fsphil
[15:45] <UpuWork> he's likely to be about but at work
[15:45] <UpuWork> just hang about sure he'll be here eventually
[15:46] <K5KXF> thanks Upu
[15:46] <K5KXF> What time is it over there?
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[15:50] <UpuWork> 16:50
[15:50] <UpuWork> whats the question others maybe able to help
[15:53] <K5KXF> It's about the NBTV
[15:53] <UpuWork> ah yeah
[15:53] <UpuWork> fsphil is who you need :)
[15:55] <K5KXF> heard of any progree from him about it lately?
[15:55] <K5KXF> progress
[15:56] <K5KXF> I've run into a bit of an issue with the Pi's sound output
[15:56] <K5KXF> it being PWM!
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[15:59] <mikestir> K5KXF: there's an add-on board with a proper Wolfson codec on it - I think it's progressed beyond the vapourware stage now
[16:00] <K5KXF> thanks Mike I'll take a look for that add on board
[16:00] <mattbrejza> is pwm audio really an issue if you low pass it?
[16:00] <mattbrejza> or just rely on the radios LPF?
[16:00] <mikestir> http://uk.farnell.com/wolfson-microelectronics/wolfson-audio-card/audio-card-for-use-with-raspberry/dp/2347264
[16:01] <K5KXF> It may I'm just having issues with it today thanks for the link
[16:01] <mattbrejza> only £5.50 more than the rpi its gonna sit on
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[16:01] <mikestir> it would be massive overkill
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[16:02] <mikestir> but wolfson codecs are generally very good
[16:03] <mikestir> what's the audio bandwidth of fsphil's nbtv mode? it's quite a lot isn't it?
[16:03] <mattbrejza> oh nbtv != ssdv
[16:03] <mattbrejza> well i doubt high enough that a lpf on the pwm wont do
[16:04] <mikestir> it was about 20kHz iirc
[16:04] <mikestir> needed sdr for rx
[16:04] <K5KXF> right now my bandwith is at 23.040 kHz
[16:05] <K5KXF> 48 lines at 15 fps
[16:07] <K5KXF> I'm using pc soundcard for RX
[16:09] <eroomde> adamgreig: he actually switched it to a dedicated yumblr
[16:09] <eroomde> http://this-plt-life.tumblr.com
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[16:09] <K5KXF> using Baofeng UV 3r for TX
[16:09] <eroomde> there are some lovely things, eg this-plt-life.tumblr.com/post/44462204757/simon-peyton-jones-adding-the-io-monad-to-haskell
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[16:11] <K5KXF> eroomde I did some checking about the BALLS rules
[16:12] <K5KXF> Have you checked with anyone over here about using SS for your dart?
[16:12] <eroomde> not in my hands
[16:12] <eroomde> one of the guys working on the rocket has done a few BALLses, all that is for him to handle
[16:13] <adamgreig> hehe
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[16:13] <K5KXF> ok good as long as someone knows because SS is not allowed
[16:14] <K5KXF> but out there in the desert well things go by sometimes depending on who you know
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[16:15] <K5KXF> just a heds up
[16:15] <eroomde> i'll let them worry about that
[16:15] <eroomde> never had a problem with amateur rules if you make a case for breaking them
[16:16] <K5KXF> you still coming over?
[16:16] <eroomde> far as i know. this is not a situation that is developing on a week-by-week basis
[16:16] <eroomde> will just start to worry about it soonish
[16:16] <eroomde> and design something up
[16:17] <K5KXF> roger that
[16:17] <eroomde> in the mean time i have a large experimental rocket engine taking up all my bandwidth
[16:17] <amell_> candy motor?
[16:17] <eroomde> and i'm also a train from paris to london having had a weekend break
[16:17] <K5KXF> I've switched to Galcit propellant
[16:18] <eroomde> amell_: if we define candy as oxygen and hydrogen, which burns oh so sweetly, then yes
[16:19] <K5KXF> nice
[16:19] <K5KXF> It's asphalt and potasium perclorate based
[16:19] <K5KXF> hows your rocket engine coming along?
[16:20] <K5KXF> any new photo's?
[16:20] <eroomde> there probably won't be any photos
[16:20] <eroomde> such is life
[16:20] <eroomde> but it's all going well
[16:20] <eroomde> we do have a new test stand!
[16:20] <eroomde> i can show you a photo of that
[16:20] <K5KXF> good news
[16:20] <eroomde> to bolt it down to
[16:20] <K5KXF> sure!
[16:21] <eroomde> https://www.dropbox.com/s/wetz9zyeoi94aqo/2014-03-26%2011.59.14.jpg
[16:22] <malgar> still problems with notam :(
[16:22] <mattbrejza> where you trying to get one?
[16:22] <eroomde> in the bay: https://www.dropbox.com/s/gukt3jw4qofy8ur/2014-03-26%2012.16.57.jpg
[16:22] <K5KXF> nice looking stand!
[16:24] <K5KXF> nice to see progress thanks for sharing
[16:25] <eroomde> sadly i can probably only show little asside things like that
[16:25] <Reb-SM3ULC> eroomde: thught for a second is was for a balloon... :) a bit tired...
[16:25] <K5KXF> ahh thats fine I enjoy it
[16:26] <eroomde> you can have faith that people aren't sitting around twiddling their thumbs
[16:27] <K5KXF> not many understand but suport equipment is a big part of the project
[16:27] <amell_> ooh. a real rocket engine with o2 and h2. whoa. what do you use to pump fuel and cool nozzles?
[16:28] <K5KXF> I'll be afk for a while still looking for fsphil
[16:29] <amell_> http://3.bp.blogspot.com/-Mx4ZiaqsrRI/UQYSZK4qT5I/AAAAAAAABsY/8mjHApgVbFw/s1600/F-1+Rocket+engine.JPG
[16:29] <amell_> is this your engine? :)
[16:31] <eroomde> bigger than the engine
[16:33] <amell_> 6.77MN of thrust. damn.
[16:34] <amell_> 413 gallons of LOX per second. damn.
[16:37] <Reb-SM3ULC> even more with five of them...
[16:42] <Reb-SM3ULC> soon 50 years ago... http://www.youtube.com/watch?v=pLQCzfzKsYs
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[16:56] <K5KXF> DL7AD online?
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[17:14] <eroomde> amell: yes, a real engine with active cooling
[17:14] <K5KXF> had to reload did DL7AD ever arrive?
[17:16] <malgar> mattbrejza: italy
[17:16] <mattbrejza> oh right, nm then
[17:16] <malgar> nm?
[17:16] <mattbrejza> never mind
[17:16] <malgar> :D you! not me
[17:17] <K5KXF> I know you guys are busy but can someone provide me links to the current tracker being worked on?
[17:18] <K5KXF> trackers?
[17:18] <K5KXF> I know DL7AD is working on one are there others?
[17:18] <K5KXF> trackers for floaters
[17:20] <DL7AD> K5KXF: online
[17:20] <DL7AD> evening
[17:20] <K5KXF> hey DL7AD you made any progress with that tracker you where working on?
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[17:20] Action: DL7AD is also known als AF5LI
[17:21] <DL7AD> K5KXF: you mean Pecan Femto 1?
[17:21] <K5KXF> yes
[17:22] <DL7AD> yes... i built one manual. its just in the front of me on my desk. the layout has just one mistake i fixed for this one.
[17:24] <DL7AD> but i cant fly this one because i need it in may for an up-and-down balloon
[17:28] <K5KXF> your located in the UK right?
[17:29] <DL7AD> K5KXF: nope... wildau near berlin, and my american call is located in houston
[17:29] <K5KXF> that's right I was looking for you
[17:29] <DL7AD> where? in houston?
[17:30] <K5KXF> you planning to market that tracker?
[17:30] <K5KXF> Yeah in Houston
[17:30] <DL7AD> well not this one.... but the next probably...
[17:31] <K5KXF> I'm in Lampasas near Austin but I have a place on the coast near Houston
[17:31] <eroomde> there seems some confusion on arocket as to what they want trackers for
[17:31] <DL7AD> K5KXF: have a look to private chat
[17:31] <eroomde> whether for recovery once landing or position tracking through flight
[17:31] <eroomde> no one has disambiguated yet
[17:32] <K5KXF> Yeah Rick Mascheck is confused about everything concerning tracking
[17:32] <K5KXF> lol
[17:33] <eroomde> hab stuff will be of little use in-flight
[17:33] <eroomde> but probably reasonable once landed
[17:34] <K5KXF> Rick and Jeff have lost about 5 "R" hybrids at BALLS never recovered a one yet
[17:34] Action: cm13g09 has broadband :)
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[17:56] <myself> kc2pit: poke.
[17:57] <kc2pit> Oh yeah.
[17:57] <kc2pit> http://aprs.fi/#!call=a%2FKC2PIT-3&timerange=3600&tail=3600
[17:57] Nick change: CCFL_Man_ -> CCFL_Man
[17:57] <kc2pit> University at Buffalo Nanosat/SEDS Joint Exerimental Balloon.
[17:58] <kc2pit> Measuring the 900 MHz and 2.4 GHz noise floor from high altitude. Naturally, being a university project, we haven't documented a damn bit of it for the public yet.
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[18:07] <myself> is it really glued to route 20 or does it just look that way? heh.
[18:07] <myself> oh no, now that I zoom in I see that the road doesn't actually go there.
[18:08] <LeoBodnar> over what bandwidth?
[18:11] <kc2pit> The US ISM bands, pretty much. Covers a little past the edges of 2.4.
[18:12] <kc2pit> So 902-927.mumble and 2400-2490ish.
[18:15] <myself> Are you downlinking the noisefloor results live, or recording and analyzing later, or both?
[18:18] <eroomde> or none/
[18:18] <eroomde> (a valid university project option)
[18:19] <myself> Hah.
[18:19] <myself> Recovering the data with a SCUBA-trained friend...
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[18:40] <Lunar_Lander> hello
[18:41] <myself> That's a pretty track. I wonder how many chaser vehicles they've got..
[18:48] <Lunar_Lander> I exchanged my crystal to 8 MHz today
[18:48] <Lunar_Lander> now RTTY and the DS18B20 work :)
[18:48] <Lunar_Lander> BMP180 no response
[18:48] <Lunar_Lander> maybe bad contact or sensor fried, have to check
[18:49] <bertrik> Lunar_Lander: are you sure about the i2c address? it can be a bit confusing
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[18:49] <Lunar_Lander> have to check that one again
[18:49] <eroomde> did you forget to add the extra ground?
[18:49] <Lunar_Lander> no, the sensor has its own footprint on the board
[18:49] <eroomde> in addition to the necessary ground
[18:50] <Lunar_Lander> which has all connections correctly put in
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[19:07] <cm13g09> mfa298, craag around?
[19:11] <cm13g09> So... according to speedtest my broadband is slower than 69% of GB
[19:13] <fsphil> faster than 31%
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[19:17] <daveake> -r
[19:18] <fsphil> pre-correcting yourself
[19:18] <fsphil> that's thinking ahead
[19:18] <Lunar_Lander> evening
[19:19] <daveake> lol
[19:19] <daveake> I mean
[19:19] <daveake> rlol
[19:20] <fsphil> normality restored
[19:23] <Reb-SM3ULC> SP3OSJ seems to loose altitude
[19:23] <Lunar_Lander> I saw something interesting on the arduino forums
[19:23] <Lunar_Lander> a big thread about a certain CMOS camera
[19:24] <Lunar_Lander> and I liked the behaviour, when someone came in who said he was new and he just bought the camera and he is low on money, they told him to put it aside and try understanding some cheap parts first
[19:31] <Reb-SM3ULC> kc2 coming down
[19:37] <myself> indeed.
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[19:43] <myself> And down... mere moments now :)
[19:44] <Laurenceb> what was the SP3OSJ free lift?
[19:45] <sp2ipt> dunno
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[19:46] <amell> Is SP3OSJ going to beat B41?
[19:47] <amell> We have a polish leo imposter
[19:47] <sp2ipt> hope RV will pick it up :)
[19:47] <Laurenceb> very impressive duration for non solar
[19:47] <Upu> eh ?
[19:47] <Geoff-G8DHE-M> He didn't do a tour of Europe first¬
[19:47] <Upu> no solar ?
[19:47] <sp2ipt> it has solar
[19:47] <Laurenceb> oh
[19:47] <Laurenceb> doh
[19:47] <Upu> was about to say
[19:48] <Reb-SM3ULC> amell: descending it seems..
[19:48] <Laurenceb> i saw the battery voltage
[19:48] <Upu> someone doing a Mexican on us
[19:48] <Laurenceb> what kind of battery does it have?
[19:49] <sp2ipt> Laurenceb: it has a battery and a solar charging it when possible :)
[19:49] <amell> definately desc
[19:49] <Laurenceb> NiMH?
[19:49] <amell> ending. I guess he sprung a slow leak
[19:49] <Laurenceb> it looks liek weather to me
[19:49] <sp2ipt> Laurenceb: don't remember
[19:49] <Laurenceb> descent profile isnt like a leak
[19:49] <amell> be great if someone recovers it
[19:50] <Lunar_Lander> evening anthony
[19:50] <amell> how would a leak descend differently?
[19:50] <myself> Welp, KC2PIT-3 is in the woods somewhere :P
[19:51] <LeoBodnar> leak usually starts descending immediately after sunset
[19:52] <sp2ipt> maybe someone shoot it ;) but on the other hand - it's not funny
[19:52] <amell> we sympathise
[19:52] <LeoBodnar> as during the day it becomes pretty much ZP
[19:53] <amell> why would it descend in the middle of the night then?
[19:53] <LeoBodnar> icing
[19:54] <LeoBodnar> micro-metheorite
[19:54] <amell> bumped into B41?
[19:54] <LeoBodnar> stray bullet
[19:54] <Reb-SM3ULC> down to 2600 m
[19:55] <Lunar_Lander> laser
[19:55] <Lunar_Lander> xD
[19:55] <enkidu> russian air-air missile
[19:55] <enkidu> "look. polish spy balloon"
[19:55] <amell> maybe B43 could take this route, the russians seem quite good at tracking. Avoid Iran.
[19:56] <Reb-SM3ULC> some time i have read up on how feet become nautical mile when high enough...
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[20:00] <sp2ipt> enkidu: sssh not that loud :P
[20:01] <enkidu> however this Crimea route was quite good for observation ;)
[20:02] <Reb-SM3ULC> enkidu: maybe carries a little Nibbler onboard?
[20:03] <enkidu> ^^
[20:03] <enkidu> will convert whole Russia into Dark Matter
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[21:09] <mattbrejza> anyone know where you can get dual row versions of http://www.adafruit.com/products/400 ?
[21:09] <mattbrejza> preferably farnell/mouser etc
[21:13] <malgar> are kilometers of spr0sj computed by the server?
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[21:53] <Laurenceb> i wonder if it can last until sunrise
[21:54] <Laurenceb> another 4 hours or so
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[21:57] <Reb-SM3ULC> think it's sinking too fast for that
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[22:19] <Laurenceb> http://diydrones.com/profiles/blogs/navio-raspberry-pi-autopilot
[22:23] <mikestir> doesn't sound like the best idea really
[22:23] <mikestir> linux is not an rtos
[22:24] <mattbrejza> "A powerful platform like Raspberry gives many opportunities like ... and possibility to run computation intensive algorithms like Kalman filtering'
[22:24] <mattbrejza> hmm
[22:24] <Laurenceb> yeah
[22:24] <Laurenceb> kind of silly
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[22:26] <jdoePT> hi! good night!
[22:34] <Maxell> \o/ SP3OSJ
[22:34] <Maxell> woot
[22:35] <adamgreig> also kalman filtering is not really intensive
[22:35] <adamgreig> it's like, "let's hold hands and pretend everything is linear. and gaussian."
[22:36] <adamgreig> an AVR can do that
[22:36] <adamgreig> hell a PICAXE could probably do th---
[22:36] <adamgreig> nah.
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[22:36] <SpeedEvil> An AVR can do it - for limited problems
[22:36] <adamgreig> I can do it in my head - for limited problems
[22:36] <SpeedEvil> In many cases you're going to need >>8 bit arithmetic.
[22:36] <SpeedEvil> And 100Hz updates on a 15 axes model...
[22:39] <Maxell> SP3OSJ quite stable right now
[22:39] <Maxell> also within range
[22:39] <mattbrejza> challenge accepted - kalman filtering on (a) picaxe(s)
[22:40] <Laurenceb> an avr cannot do kalman filtering
[22:41] <Laurenceb> yeah 15 component state vector is serious business
[22:41] <Laurenceb> enough to keep a stm32f4 fully occupied
[22:41] <bertrik> a kalman implementation is one of the things I want to do sometime, but it currently mostly black magic to me
[22:41] <Maxell> RZ6HSP aprs igate seems to RX'd SP3OSJ-12
[22:42] <Laurenceb> i played around with 15 component on stm32f3 and it wasnt up to the job
[22:42] <Laurenceb> ~100hz update rate is quite poor
[22:42] <mattbrejza> how many components on a standard quad?
[22:43] <Laurenceb> most of them are using simple complementary filters
[22:43] <Laurenceb> i think just a quaternion and gyro bias would work, so 7
[22:44] <Laurenceb> i stuck code for that on the wiki ages ago
[22:44] <Laurenceb> http://ukhas.org.uk/code:7_state_ekf_with_bias
[22:45] <mattbrejza> i didnt think kalman filtering for quads was *that* cpu intensive, but then ive never looked at it in detail (or really at all)
[22:45] <Laurenceb> it isnt
[22:45] <mattbrejza> having said that i wanted to flash some leds on an avr recently and im beginning to run out of cycles
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[22:45] <Laurenceb> 7 component is a fraction of the flops
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[22:54] <jdoePT> Did anyone tried an hydrophobic coating on the camera lens to prevent foggy images? (e.g, on a go Pro)
[22:54] <jdoePT> (on the outside of the camera (passing clouds)
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[22:55] <ulfr> go pro sells some anti fog stuff, never used it tho'
[22:56] <K5KXF> ping fsphil?
[22:57] <jdoePT> yes, i've used it, it prevents condensation on the inside.. but passing clouds it seams that the water is on the outside of the lens
[23:01] <SpeedEvil> I think the only way that will 100% work is a rotating window
[23:01] <SpeedEvil> Which is unfortunately complex
[23:01] <SpeedEvil> Or an air-blast blowing out of the lens
[23:02] <SpeedEvil> http://commons.wikimedia.org/wiki/File:Rotating_windshield_wiper.jpg
[23:02] <Lunar_Lander> cool!
[23:04] <jdoePT> what about http://en.wikipedia.org/wiki/Superhydrophobic_coating and neverwet like coatings?
[23:04] <SpeedEvil> jdoePT: those will mostly work
[23:05] <SpeedEvil> But if you get actual rain falling on the lens, it takes a while
[23:06] <jdoePT> yesterday we had a launch, there was no rain, but the humidity was high.. and temperature cold.. my guess is that fog turned into ice..
[23:06] <jdoePT> on the outside of the lens
[23:06] <Laurenceb> maybe heat the lens..
[23:07] <Laurenceb> but honestly im not sure if this is a huge problem
[23:08] <jdoePT> you guys neve got bad footage due to fog and water in front of the lens?
[23:08] <SpeedEvil> Generally not - with most cameras that tend to run hot
[23:08] <K5KXF> after thermopause it's not a problem
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[23:08] <SpeedEvil> jdoePT: rarely
[23:09] <jdoePT> take a look http://www.balua.org/we-found-it-2/
[23:09] <jdoePT> first image is at takeoof
[23:09] <jdoePT> and the flight lasted 2h
[23:10] <K5KXF> nice
[23:10] <jdoePT> and the fog lasted all of it.. it was a gopro2 (they do get very hot, mostly the batery)
[23:11] <K5KXF> they are vented dont block the vent!
[23:11] <K5KXF> :)
[23:11] <jdoePT> it does get better with the altitude but still isn't good
[23:11] <jdoePT> ? you me send it with the open housing??
[23:11] <jdoePT> mean*
[23:12] <K5KXF> where you blocking it's vent?
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[23:12] <K5KXF> yes it's in the housing look at it
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[23:13] <K5KXF> it's a slot
[23:14] <K5KXF> dont block that and you should have no problem
[23:15] <jdoePT> i'm not quite sure I understand, you mean, use this one; http://www.dogcamsport.co.uk/images/uploads/GoPro-HD-Vented-Back-Door/back_door_vented.jpg and note THIS: http://img.dxcdn.com/productimages/sku_234759_1.jpg
[23:16] <K5KXF> oh! lol yeah you cant use that case
[23:16] <K5KXF> it's waterproof
[23:16] <jdoePT> does the go pro survive? in case it falls into the water it will be lost..
[23:17] <K5KXF> Ok well if you feel like you need the case put a 1/2 inch hole in the bottom amd the top
[23:17] <K5KXF> But yes I've been flying gopro's since 2008 without that case
[23:17] <jdoePT> nice! I never had the balls =P
[23:17] <K5KXF> lol
[23:18] <K5KXF> it's not needed unless your unlucky and land in water
[23:18] <jdoePT> well you put it inside the syroform box right?
[23:18] <K5KXF> I've never lost one
[23:18] <K5KXF> it will fly bare in the wind if you want
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[23:19] <K5KXF> no issues
[23:19] <K5KXF> buy you can put it in a box just dont block the vent
[23:20] <jdoePT> ok next friday i'll try it
[23:20] <K5KXF> my fav shot https://www.facebook.com/photo.php?fbid=10150707509246224&set=a.10150707509241224.451566.213171526223&type=1&theater
[23:20] <jdoePT> do you use a gp2 or 3?
[23:21] <K5KXF> We flew 6 gopros together and got some panoramas
[23:21] <K5KXF> I still us GP 2
[23:21] <K5KXF> becaus I still have em
[23:23] <jdoePT> we use gp2 cause the batery pack for the 3+ is out of sotck..
[23:23] <Laurenceb> its heading up now
[23:23] <jdoePT> and for long flights we need it..
[23:23] <Laurenceb> less than 3 hours to sunrise
[23:24] <jdoePT> (thanks K5KXF)
[23:24] <jdoePT> Laurenceb what's going do happen?
[23:25] <Laurenceb> dawn might clear up the altitude issues
[23:25] <Laurenceb> if its icing up or something
[23:25] <K5KXF> APRS?
[23:25] <jdoePT> ?
[23:25] Action: Laurenceb zzz
[23:26] <K5KXF> here's one of the panos https://www.360cities.net/image/panorama-at-100-000-ft-over-texas
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[23:26] <K5KXF> You have a launch going right now Laurenceb?
[23:27] <Laurenceb> i dont
[23:27] <Laurenceb> check spacenear
[23:27] <K5KXF> roger ty
[23:28] <dariogrsilva> the panos is awesome
[23:29] <K5KXF> Well thanks but it was made with the cases on much to my consternation
[23:29] <K5KXF> and that's why so foggy
[23:29] <K5KXF> lol
[23:30] <K5KXF> Dont use the case or make sure you vent them and that wont happen
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[23:30] <K5KXF> but the cost of 6 gopros warrented using the cases I suppose
[23:31] <K5KXF> just in case
[23:31] <jdoePT> true!!
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[23:45] <K5KXF> so who is flying SP3OSJ and G-03?
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[23:59] <aadamson> K5KXF, easiest thing to do is check here - https://groups.google.com/forum/#!forum/ukhas
[00:00] --- Tue Apr 1 2014