highaltitude.log.20140702

[00:00] <amell> where can i find sstv?
[00:01] <G8APZ> amell when I first tried to get into learning to pass the RAE I was still at school in 1960... and the local Technical college would not allow anyone to attend night school if in full time education.... so I had a local ham teach me and a friend every week
[00:01] <G8APZ> I failed, my friend passed!
[00:02] <G8APZ> then in 1964 I bought the RSGB manual on the RAE, self studied, applied for the exam and passed
[00:02] <amell> but where do you do the exam?
[00:03] <amell> there is a exam session at the ukhas conference, but unfortunately im on holiday then
[00:03] <G8APZ> written City and Guilds exam... 10 questions... 10 marks each...you had to be able to answer questions like "with the aid of a circuit diagram, explain the action of a mixer circuit in a superhet receiver!"s
[00:04] <G8APZ> modern one is tick the box.... email me at g8apz@g8apz.org.uk and I'll let you have a list of places where you can join a course... free and usually at local radio clubs
[00:05] <amell> ok thanks.
[00:05] <amell> APRS is supposed to be at 144.800, but cant find any activity there.
[00:06] <G8APZ> amell I'll be off line after tonight until I reach my other home in France on Thursday... so please expect a delay in my reply
[00:06] <amell> no worries, have a nice holiday!
[00:06] <G8APZ> APRS is usually on mobiles ... short range to stations equipped to act as nodes
[00:07] <G8APZ> amell I will be on 2m EME and MS from SW France... working the world via the moon on VHF!!
[00:07] <G8APZ> amell I'll still be checking in here...
[00:07] <amell> what is EME/MS?
[00:08] <G8APZ> MS = meteor scatter... up to 2300km
[00:08] <G8APZ> EME = earth - moon - earth bouncing signals off the moon and receiving at very low levels... path loss is colossal!!
[00:08] <amell> wow
[00:09] <G8APZ> MS you transmit digital sigs for a minute and if any meteor trail occurs for just tens of milliseconds, the software decodes it
[00:10] <G8APZ> then you listen, and if someone has decoded and responds you start a QSO!
[00:10] <G8APZ> needs a very good receiver and preamp and a decent antenna, and low loss cable.
[00:11] <amell> yeah, just read about it on wikipedia. 300hz doppler shift at moonrise apparently
[00:11] <amell> anyway, i have to shoot now.
[00:13] <G8APZ> OK... don't give up! The dongle and small antenna is only the very basic level... the range of serious stuff is far more interesting!!
[00:14] <G8APZ> granted it needs some cash... but you must start somewhere... when you cannot afford, you innovate...build a yagi, build a preamp, etc
[00:15] <G8APZ> Doppler shift depends on the band... gets far worse at 10GHz and 24GHz!!
[00:15] <G8APZ> and depends on whether moon approaching earth or receding
[00:16] <G8APZ> can be positive or negative
[00:16] <G8APZ> have a good sleep... I'll catch you in the days to come no doubt - just recall F1VJQ... that's me!!
[00:17] <G8APZ> still decoding CARS1
[00:17] <amell> Its indistinguishable for me.
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[00:18] <amell> I would be still decoding one of Leos if it was in the same place
[00:18] <G8APZ> are you near Huntingdon?
[00:18] <G8APZ> I have 25db/n here
[00:18] <amell> lost CARS-1 at 102km. Bs using contesia I lose at 350-370km
[00:19] <G8APZ> it is only 109km here
[00:19] <amell> ah ok.
[00:19] <amell> maybe you will lose it before too long
[00:19] <G8APZ> thats good on Contestia... I got 444.5 on B-62!!
[00:19] <amell> its just noise in the dongle i think.
[00:20] <amell> i will get a yaesu sometime.
[00:20] <amell> but first i must sleep
[00:20] <amell> night
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[00:21] <G8APZ> dongle is always going to be a compromise...but at the price excellent way to start....a serious transceiver - old and secondhand maybe is well worth having....just don't go down the FM only route... that's for local stuff and repeaters only
[00:21] <G8APZ> Goodnight 73
[00:22] <G8APZ> I have 8 transceivers ..all about 20 years old... but still good enough for contests, and EME and MS!!
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[00:24] <G8APZ> CARS-1 now outside British Territorial waters
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[00:27] <G8APZ> Goodnight all.... 73
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[01:33] <G8APZ_insomniac> still receiving CARs-1 but not for much longer
[01:34] <G8APZ_insomniac> only 142km but at 4.5km is getting some reds
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[01:46] <arko> anyone have an online sdr for me to continue tracking?
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[04:57] <G4MYS-Andy> says something for the stability of CARS when I am stilltracking it + - QSB this morning!
[04:59] <arko> nice
[04:59] <arko> it's in france
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[05:53] <tweetBot1> @nerdsville: Despite a few technical issues (projector max res 800x600 and wifi) #hab talk at Grantham ARC went well.. big crowd!! #ukhas
[06:04] Nick change: sp2ipt1 -> sp2ipt
[06:19] <m0psx> Looks like the last CARS-1 packet was sent at 06:47... voltage 0.7 at 5,400m - Probably still in flight but no longer transmitting?
[06:29] <UpuWork> very likely
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[06:45] <chrisstubbsW> I wonder if cars1 will make the transition into a day float
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[06:59] <Maxell> chrisstubbsW: we will never know :)
[07:05] <fsphil> radio died?
[07:09] <UpuWork> battery
[07:11] <fsphil> shame, good flight
[07:14] <Steve_G0TDJ> Well done chrisstubbsW
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[07:22] <m0psx> Nice one Chris - good flight!
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[07:56] <chrisstubbsW> I had a pretty good signal from it when I woke up, but by the time I left for work it was gone
[07:56] <chrisstubbsW> I presumed it had just gone out of range, but yeah looks like its dead
[07:56] <fsphil> what was the battery?
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[07:57] <chrisstubbsW> 1xAA energizer lithium
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[08:10] <amell> just looking at CARS-1 - burst or battery ran out?
[08:10] <mikestir-work> looks like battery
[08:10] <amell> interesting that it remained in stable float after dark
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[08:11] <amell> but ascended with the morning
[08:11] Nick change: SiC- -> SiC
[08:23] <Maxell> amell: yep thats teh powerrrrr of the sun :)
[08:23] <fsphil> all hail Ra
[08:24] <Maxell> Well the sus did screw up some other floats so meh
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[08:39] <LeoBodnar> B-62 has been updated
[08:40] <LeoBodnar> UN9PQ made a recording yesterday
[08:40] <fsphil> altitude looks solid
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[08:53] <tweetBot1> @G7IGB: Chelmsford 434 MHz balloon heads into Europe: On Tuesday, July 1 at 19:50 BST Chris Stubbs... http://t.co/QpYlLYdxSw #hamradio #ukhas
[08:54] <fsphil> disappears over La Tremblée
[08:54] <fsphil> next to Flavacourt
[08:55] <fsphil> sounds like a bad shopping centre
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[09:26] <FuzzyLemon> What are the disadvantages of doing a balloon launch in the rain? Does it damage the balloon significantly and affect the burst altitude?
[09:26] <SpeedEvil> It makes the free lift much harder to judge.
[09:26] <SpeedEvil> And you get wet.
[09:27] <SpeedEvil> Also, rain is what happens at the ground.
[09:27] <SpeedEvil> The processes to generate rain inside the cloud can be quite a lot more violent than what you see
[09:28] <craag> I think one of the big dangers is losing grip of the balloon while filling.
[09:28] <craag> The balloon will 'funnel' all water that lands on it down the neck and onto your hands as you're holding it.
[09:32] <FuzzyLemon> so it's not recommended?
[09:33] <craag> It can be done, just adds to the challenges. Hold onto it tight and put a few extra stirks in while filling.
[09:34] <craag> Also make sure to waterproof your payload
[09:34] <craag> I take it then you're looking at launching this weekend?
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[09:38] <lz1dev> does anyone have a nice clean sample of APRS?
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[09:46] <daveake> Rain is unpleasant to launch in, but I'd sooner have rain than strong winds
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[09:47] <daveake> And if you're launching this weekend, you'll probably get both :p
[09:47] <fsphil> snow and ice is no fun
[09:48] <FuzzyLemon> I was planning on launching on saturday but i don't think its a goer
[09:48] <lz1dev> nor are solar flares
[09:49] <FuzzyLemon> wind and rain
[09:49] <craag> I'm really hoping it clears up a bit
[09:50] <craag> Spending this weekend camping in a field with a couple of radio masts
[09:50] <daveake> Yep
[09:50] <daveake> Ah, lightning conductors :p
[09:50] <fsphil> don't put your tent near them
[09:51] <craag> Erm, I'll just be holding the mic => radio => coax => antenna :P
[09:51] <mfa298> hmmm, looks like it's wet during the day and dry overnight - just what you want when camping
[09:51] <fsphil> our radio club is going camping on an island end of this month
[09:51] <fsphil> always fun
[09:51] <craag> Yeah first sign of lightning and we'll be running.
[09:52] <fsphil> the trees on the island we camp on are regurlarly struck
[09:52] <fsphil> yay speeling
[09:53] <craag> cool fsphil! Working hf from there?
[09:53] Action: LazyLeopard went camping in Wales once, in August...
[09:53] <daveake> Handy hint: If "regularly" is too tricky, use "freqeuntly" instead
[09:53] <fsphil> craag: yep!
[09:53] <LazyLeopard> Won't repeat the exercise.
[09:54] <fsphil> daveake: hah, notted
[09:54] <craag> At least bad weather means the more wimpy clubs will drop out
[09:55] <craag> less competition :)
[09:55] <mfa298> eye don't trussed spewl chequers
[09:56] Action: mfa298 shouldn't have abbreviated doe knot
[09:56] <Ian_> Remember craag, that cable/plug faults invariably turn out to be at the top of the mast, so watch for who is claiming to have made/checked cables and best do it yourself . . . What's your group's VHF NFD callsign?
[09:57] <mfa298> sounds like a weekend for lots of tightly applied leccy tape over the connectors
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[09:59] <craag> Ian_: Yep we've got an antenna analyser that we use to check at each stage of the antenna deployment. G3KMI/P
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[10:00] <Ian_> rgr QAP G3KMI/P likely to be casually giving away points from G7SRG/P but nothing serious. Used to feed G4WBC/P for several years, but not for the last five or six. Lotsa bacon!
[10:02] <Ian_> Smart move on the Ae Analyser.
[10:02] <craag> Heh yes the mini-fridge will be full of bacon at G3KMI
[10:02] <Ian_> Less useful than lots of hot food and pre-checked cables though . . .
[10:02] <craag> Yeah cables are being checked today
[10:03] <Ian_> That was ref the analyser not fridge full of bacon. Sounds like you only need the beer now.
[10:03] <craag> ;)
[10:04] <craag> The analyser found the our driven element on the 2m beam last year was broken, at 11am on sunday
[10:04] <craag> *saturday
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[10:05] <craag> so we had to ugly-bug a new socket onto it! worked perfectly though
[10:05] <fsphil> there is always a nice bbq at these events
[10:06] <craag> Even when it's pouring - there's still bacon http://photos.suws.org.uk/index.php?album=outings/vhf-national-field-day-2012&image=img_3132.jpg
[10:06] <fsphil> I'll try and get setup for doing digi modes
[10:07] <fsphil> but last time the two stations where interfering with eachother
[10:08] <craag> fsphil: You got horizontal on any of 6/2/70?
[10:08] <fsphil> can do
[10:08] <fsphil> they normally have a vertical 2m antenna for more local chat
[10:09] <fsphil> I've nothing for 6m but can soon put something together
[10:09] <craag> for this weekend or your island event?
[10:09] <fsphil> conditions would need to be pretty good to make 6m useful
[10:09] <fsphil> either
[10:09] <craag> Yeah 6m might be a bit busy for messing around
[10:09] <fsphil> I can head up the hill at the weekend, 400m asl is bound to help
[10:09] <Ian_> I swapped a tent for a few years for a kitchen and made breakfast, brunch and dinner for for fourteen. I felt it to be a great acomplishment. Friend has eight kids and his wife does that sort of thing every day of the year . . .
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[10:09] <fsphil> busy?
[10:09] <fsphil> 6m is normally totally empty for me :)
[10:10] <craag> It won't be on saturday evening ;)
[10:10] <fsphil> I'll see what I can setup
[10:11] <mfa298> this is the weekend to listen around on all the VHF/UHF bands. last year was the 2nd time I'd heard anything on 2m ssb
[10:11] <craag> We'll be running 2m ssb all 24h, 6m from 3pm - 10pm sat night, 70cm from about midnight sat through 3pm sun
[10:12] <Ian_> 6m even in contests seems to be the gentlemans band, with lots of time to chat . . . the points help but contacts used to be fairly thin on the ground. It has possibly improved with the gear being available, but that doesn't help the propagation an awful lot.
[10:13] <craag> I'll be reachable on irc if you do have a chance to be set up.
[10:13] <amell> what freq in 2m would you usually be on?
[10:13] <craag> We had a good time on 6m last year, worked a lot of north europe
[10:14] <craag> amell: We haven't got a usual frequency as such, we just tend to find a free slot and sit in it.
[10:15] <amell> yes, but approx? 144.5 145.5 etc?
[10:15] <amell> just looking for a commonly used range
[10:15] <mfa298> 2m ssb tends to be around 144.3 from memory
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[10:16] <craag> 144.15 - 144.5 roughly
[10:16] <amell> will have a look around there on sat
[10:16] <craag> centered on 144.3
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[10:16] <craag> :)
[10:16] <mfa298> amell: you might want to look up the rsgb band plans as that will list whats on the various ham bands
[10:16] <craag> http://thersgb.org/services/bandplans/html/rsgb_band_plan_jan_2014-1.htm
[10:17] <mfa298> although for ssb you tend to want a horizonal antenna not a vertical.
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[10:17] <craag> If all you have is a vertical it's still worth a go though
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[10:17] <craag> A lot of stations are running large amounts of power into big yagis
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[10:18] <craag> (we're using 100W into a 17-ele)
[10:19] <amell> if you knock the power up you might have better success getting through to ISEE3
[10:20] <craag> heh, this is the 'Restricted' section
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[10:20] <craag> (<=100W, <=10m mast, single driven element)
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[10:21] <amell> ive noticed DSN has been very busy with voyager 1 and 2 for the last couple of weeks.
[10:21] <amell> but i suppose data at 159b/s will take a long time to download
[10:22] <daveake> 159? Luxury ...
[10:25] <amell> not bad for something designed in 1972.
[10:26] <namor> we're about to order a Raspberry Pi - P-HAB (http://www.pridopia.co.uk/pi-p-hab.html). is there anything speaking against it except the weight? thanks for your feedback...
[10:26] <daveake> I would comment but I'm biased ....
[10:26] <craag> Have you seen the Pi-in-the-sky?
[10:27] <namor> yes. looks like a simular solution. would you go for that?
[10:27] <amell> yes, i would
[10:27] <craag> I would.
[10:27] <daveake> so would I lol
[10:27] <namor> biased by what?
[10:27] <craag> namor: He helped build it.
[10:27] <daveake> Biased by part designing it :)
[10:28] <LeoBodnar> are you making a vested interest disclosure?
[10:28] <daveake> I do not own a vest
[10:28] <amell> http://www.raspberrypi.org/pi-in-the-sky/
[10:29] <gonzo___> are you stringing him along dave?
[10:29] <fsphil> this is starting to unravel
[10:29] <craag> In fact the pi-in-the-sky comes with a gps antenna - which already makes it cheaper than the one you posted.
[10:29] <namor> o.k. sounds good. dave, you are "Dave Akerman" from pi in the sky?
[10:30] <amell> yes.
[10:30] <gonzo___> knot really phil
[10:30] <namor> ok. and where can i order the pi-in-sky?
[10:30] <daveake> namor It's www.pi-in-the-sky.com, in production now but there's a pre-sale. Software is open-source and on github. We've flown the board twice without issues and will be doing so again this weekend.
[10:31] <gonzo___> the garammar of that could jinx it
[10:31] <amell> daveake: you need to SEO that website. I couldnt find it on google.
[10:32] <daveake> That's Upu*'s job :)
[10:32] <fsphil> I might dump one in the atlantic ocean
[10:32] <fsphil> so if you have a boat ...
[10:32] <amell> wow. it comes with a battery holder and clip
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[10:33] <namor> thanks. didn't see that the board will be for sale. very good!
[10:34] <namor> will it be ssdv ready?
[10:34] <UpuWork> it is
[10:34] <amell> namor: btw, are you ordering Pi model A? save weight.
[10:34] <UpuWork> already namor
[10:34] <UpuWork> SEO whatever
[10:34] <UpuWork> You should use the Model A
[10:35] <UpuWork> it will last twice as long on a set of batteries
[10:36] <craag> UpuWork: btw could probably do with something on there that states you need a radio receiver as well ;)
[10:36] <amell> do you?
[10:37] <namor> how would you try to build up a ISM frequency club in switzerland?
[10:37] <UpuWork> yeah we are working on documentation
[10:37] <amell> does that club involve funny handshakes?
[10:37] <namor> funny handshakes?
[10:38] <amell> lost in translation i fear
[10:38] <craag> or a package deal that comes with an rtl-sdr ;)
[10:38] <amell> craag: and the contact details for a hab-recovery team
[10:40] <namor> absolutely...
[10:41] <WillDWork> Upu/daveake - how many pre-orders do you need? or is it a case of as-many-as-possible
[10:41] <joeman1> hi
[10:41] <UpuWork> We don't need any WillDWork
[10:41] <joeman1> Anyone use Type 1 paracord for the flights?
[10:41] <UpuWork> I've paid for it already
[10:41] <WillDWork> cool
[10:41] <UpuWork> but means I can judge the uptake and order some more as needed
[10:42] <UpuWork> we ordered 40 boards initially
[10:42] <WillDWork> i think i'll grab one.... on the next credit card month (4th)!
[10:43] <fsphil> it could also double as Pi-on-a-boat
[10:43] <fsphil> though the range wouldn't be as good
[10:43] <amell> what for?
[10:43] <fsphil> robot boats
[10:43] <amell> AIS is here for that reason
[10:44] <fsphil> not for boats 30cm long
[10:44] <amell> why not...
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[10:44] <UpuWork> Cool WillDWork well there will be some left in a few days I'm sure
[10:45] <WillDWork> cheers UpuWork - deffo count me in your numbers
[10:45] <UpuWork> thanks
[10:45] <UpuWork> I decided to get them made properly by an assembly company
[10:46] <UpuWork> quite expensive but worth it so I can have my weekends back :)
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[10:48] <WillDWork> do hackvana do assembly - or are they purely printing/etching etc
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[10:50] <UpuWork> not using Hackvana for assembly using a company in the UK
[10:50] <UpuWork> PCB's are Hackvana though
[10:50] <WillDWork> good stuff :)
[10:51] <UpuWork> also they do lead free
[10:51] <UpuWork> which I hear is all the rage these days
[10:51] <UpuWork> guessed I best stop using leaded solder in case some kids decided to lick the PCB
[10:51] <gonzo___> the D-5 balloon in .de had an aprs did as one payload, which was to relay the data from a sonde bouy that they had floated out on the lake a few days before
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[10:52] <UpuWork> right afk
[10:52] <gonzo___> not quite a boat, but interestingly daft idea
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[10:52] <craag> *cough* ukhasnet
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[10:56] <fsphil> you should get that seen to craag
[10:56] <craag> it's more sneezing at the moment tbh
[10:56] <craag> darn summer
[10:56] <fsphil> right there with ya
[10:57] <fsphil> has there not been a ukhasnet flight yet?
[10:57] <craag> Not yet :/
[10:58] <fsphil> still very aprs-like
[11:00] <mfa298> aprs-like but with less of the snobbery :D
[11:01] <fsphil> that's a plus
[11:03] <craag> Yeah I'm quite liking it for low-cost wireless sensors around the house
[11:03] <craag> Using non of the repeating really
[11:04] <Maxell> yep dad loved the stats
[11:04] <Maxell> might redo the setup here... Havn;t done much ukhasnet last month(s)
[11:04] <craag> Got several nodes with an m168p, rfm69, ds18b20 and 3x AA, been running for over a month now and still above 1.5V/cell
[11:05] <craag> nice little 'temperature bugs'
[11:05] <fsphil> I'd like to setup an 868mhz IP network
[11:05] <fsphil> using the Pi as a kind of AP
[11:06] <fsphil> just dumping packets to the Si chip
[11:07] <namor> one last question (sorry to be a beginner in the radio sphere). if we get a amateur licensed person to collaborate, would it be possible to use the pi-in-the-sky with the same antenna to integrate into the ordinary aprs-network?
[11:07] <craag> namor: No
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[11:07] <craag> You can get off-the-shelf APRS trackers like tinytrak
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[11:08] <craag> Just make sure they have a GPS that works at high altitude.
[11:08] <daveake> http://www.habduino.org/
[11:08] <craag> heh, or that ^^
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[11:09] <craag> (made by same guy(s) as pi-in-the-sky)
[11:09] Nick change: GW8RAK_ -> GW8RAK
[11:09] <daveake> -(s)
[11:09] <daveake> Just Upu not me
[11:09] <daveake> That said I did fix a line of code in it :)
[11:10] Action: daveake sends invoice
[11:10] <namor> ok.
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[11:14] <amell> pi in sky doesnt do aprs?
[11:15] <daveake> Correct
[11:15] <amell> oh. habduino has aprs code in the github
[11:16] <fsphil> it is possible to do aprs on the pi, but it needs extra hardware (HX1 or similar)
[11:17] <mattbrejza> yea, same hardware, just need to change over the radios?
[11:17] <mattbrejza> actually i guess the radio tx pin would need to be pwm if it isnt already
[11:17] <daveake> It is
[11:18] <craag> Then you can do ssdv on aprs :D
[11:18] <daveake> :)
[11:18] Action: craag ducks
[11:18] <daveake> SSDV with the "wrong" WIDE setting ...
[11:18] <fsphil> you joke, but I plan to do this if 2m airborne is allowed :)
[11:18] <daveake> ... the world would end
[11:19] <daveake> fsphil Is airborne allowed over Ireland?
[11:19] Action: craag takes out a life insurance policy on fsphil
[11:19] <amell> is there a pic of the pits board?
[11:19] <fsphil> I believe so daveake, but you're not allowed to launch there
[11:19] <fsphil> I'd have to launch here and make sure the winds go south
[11:19] <amell> never mind, found it
[11:19] <daveake> You need the right winds then :)
[11:19] <daveake> amell Several - follow @pitsproject
[11:19] <fsphil> I must double check that actually, I couldn't find the exact license terms for ROI
[11:21] <amell> strangely i cant see what radio it uses.
[11:21] <fsphil> they won't be very big images
[11:21] <daveake> NTX2B
[11:21] <fsphil> don't want to give someone a heart attack
[11:21] <daveake> It's under the board
[11:21] <amell> frequency set via text file?
[11:21] <WillDWork> i like the frequency selection options
[11:21] <daveake> Frequency agile. You set the frequency in a config file on the SD card.
[11:22] <daveake> All the config is in a file in the /boot partition meaning you can edit from a PC
[11:22] <daveake> </advertising_mode>
[11:23] <amell> just a little pre-sales support
[11:23] <daveake> In that case :) ...
[11:23] <daveake> ... So you just download and burn the SD image, edit the frequency/baud/payload ID/etc., plug and go
[11:23] <mattbrejza> gonna bundle a rtl dongle and stuff?
[11:24] <daveake> Yes there will be such a kit
[11:24] <mattbrejza> its not particlary obvious atm that the data isnt magically transfered to the internet like some people will probably assume
[11:25] <daveake> Yeah I'll edit to make it clear
[11:25] <fsphil> we need a little cartoon showing how it works
[11:26] <namor> would it be possible to store a hd video stream on the sd card of the Pi In The Sky?
[11:26] <daveake> yes
[11:26] <daveake> You'd need to change the camera script
[11:26] <namor> thanks. how long will it take to get live video down ;o) ?
[11:26] <daveake> At present you can't do video + stills at the same time, but that will be added later
[11:27] <daveake> No live video
[11:27] <daveake> Not in the UK anyway
[11:27] <daveake> In the USA just plug the Pi into an ATV transmitter job jobbed
[11:27] <namor> is this a technical or legal issue?
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[11:27] <daveake> legal
[11:27] <daveake> need more powwwwer
[11:27] <amell> i might get another rtl dongle from somewhere else and see what the noise is like. Wondering if theres a review of the various $7 dongles and their noise levels.
[11:30] <namor> very last question for today: what's the weight of the assembled pi-in-the-sky?
[11:32] <mattbrejza> 66g + gps antenna + batteries iirc
[11:33] <namor> + pi?
[11:33] <mattbrejza> that includes a model
[11:33] <mattbrejza> A pi
[11:33] <namor> good. thank you all for your help!
[11:34] <daveake> mattbrejza See http://www.pi-in-the-sky.com/ - better?
[11:34] <mattbrejza> yep
[11:34] <daveake> ta
[11:34] <mattbrejza> although im sure someone will stil manage to miss it :P
[11:35] <daveake> It's right at the top so NMP :)
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[11:38] <mikestir-work> amell: it's not really the noise floor that's the problem. It's the 8-bits of dynamic range
[11:40] <mfa298> if you want something that's going to be better save up and get a Funcube Pro+ dongle
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[11:42] <mfa298> or wait for the one that I cant remember the name of thats going to be somewhere between the RTL and FCD both in erms of price and performance
[11:43] <mattbrejza> tbh what you want is a breakout board for the tuner the fcd has
[11:43] <mattbrejza> then you could make a 434 hab rx with decent performance
[11:43] <mattbrejza> (fcd++)
[11:44] <Maxell> mfa298: airspy
[11:44] <Maxell> No filters tho so not sure if you would call it in between
[11:45] <Maxell> more like a super rtl dongle
[11:45] <Maxell> but yeah airspy will have more dynamic range
[11:46] <mfa298> Maxell: that would be the one I was thinking of. Better dynamic range but as you said no filters so it's going to cope a bit better than an rtl but still unlikely to be as good as the fcd
[11:46] <mattbrejza> doesnt get round the fact that your chasecar needs a decent laptop and a variety of pita software
[11:47] <mfa298> the 10MHz spectrum could be interesting (or an extra issue)
[11:48] <mfa298> For the chase car I'm not sure if a decent dongle is much worse than a decent radio and laptop
[11:48] <mattbrejza> tablet ;)
[11:48] <mfa298> my 3 year old dell netbook can just about do it all.
[11:49] <mattbrejza> also the knob on the top can tune rather than trying to use a trackpad
[11:49] <mfa298> but a real radio definetly helps if you're trying to df in the middle of woodland
[11:49] <Maxell> yes. No cabcle clutters wins
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[11:50] <mfa298> I think I end up with less cable clutter with sdr on the netbook but that's mostly down to no built in audio in on the netbook so also needs an external sound card
[11:51] <mattbrejza> you also dont need an inverter for a tablet
[11:51] <mattbrejza> most peoples laptops you wouldnt want to rely on them surviving a day
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[11:56] <amell> www.airspy.com says The target price should be something between 99 and 149 USD ex. VAT - might as well buy a FCD then.
[11:59] <Maxell> amell: but it won't have 10 MHz of bandwidth
[11:59] <amell> why would it need such?
[11:59] <Maxell> Because 192 kHz is not a lot.
[11:59] <Maxell> amell: too capture all of the FM band
[12:00] <Maxell> For example meteor scatter
[12:00] <Maxell> So you can play back the recording afterwadrs and listen to each station to ideentify the source
[12:00] <mfa298> having already got an FCD Pro+ I might get an airspy if they come out nearer $99 to add it to the collection. Alhough for most of what I've done with it the 192KHz has been plenty
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[12:07] <mattbrejza> for when we start doing DSSS with 5Mbps spreading code
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[12:11] <qyx_> actually spirit1 transceiver can manage 1.6mbps gmsk with raw input
[12:11] <qyx_> plenty of bw to implement dsss \o/
[12:11] <qyx_> in software
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[12:13] <ProSpectre> hello HABies
[12:14] <Maxell> yes hello
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[12:18] <ProSpectre> so B-62 still flyin, nice. to bad there was no station between
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[12:40] <Maxell> Receivers: APRS
[12:41] <Maxell> However it was 2E0TOY/LeoBodnar who uploaded it...
[12:41] <Maxell> LeoBodnar: whats going on? :)
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[12:43] <craag> Maxell: A russian made a recording
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[12:44] <Maxell> Ah some station that was not able to decode by itself. Noted.
[12:48] <Laurenceb> anyone know how to search for files created on a specific date on *nix ?
[12:51] <ReadError> find w/ ctime
[12:52] <ReadError> but yea that doesnt use the specific date..
[12:52] <SpeedEvil> -cnewer
[12:52] <SpeedEvil> sort of
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[12:52] <ReadError> or ghetto...
[12:53] <ReadError> ls -lnahtrR / | grep "date"
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[12:57] <fsphil> nice, [ot-ish] http://solarsystem.nasa.gov/multimedia/display.cfm?Category=Planets&IM_ID=19486
[12:57] <fsphil> I wasn't certain they'd find anything past pluto for new horizons
[12:58] <Laurenceb> got it
[12:58] <mfa298> ReadError: for proper ghetto replace grep with awk then possibly feed the output to xargs to do something with the file
[12:59] <Laurenceb> 2007-01-01
[12:59] <Laurenceb> -newermt
[12:59] <ReadError> thats modified
[13:00] <ReadError> is there a newerct ?
[13:02] <Laurenceb> hmm
[13:02] <mfa298> 13:52 < SpeedEvil> -cnewer
[13:03] <mfa298> shame it doesn't look like there's a -colder (or way of doing the same) otherwise you could do some nifty stuff with touch
[13:04] <mfa298> touch -t 19991231120000 /tmp/start && touch -t 20000101120000 /tmp/end && find / -cnewer /tmp/start -colder /tmp/end
[13:05] <mfa298> although you could possibly do some of that with -ctime
[13:06] <mfa298> ah you might be able to do that by replacing the -colder with ! -cnewer
[13:06] <Laurenceb> newerct works
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[13:09] <mfa298> I don't see a -newerct option for find (although I'm guessing it's an alias for -cnewer)
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[13:10] <mfa298> looks like my touch & find solution will work for a specific time range
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[13:11] <mfa298> touch -t 1406240000 /tmp/start && touch -t 1406242359 /tmp/start && find /home/mike -cnewer /tmp/start ! -cnewer /tmp/end -ls
[13:12] <mfa298> does everythign in /home/mike for 2014-06-24 between 0000 and 2359
[13:15] <Laurenceb> https://ready.arl.noaa.gov/hypubout/128003_trj001.gif
[13:15] <Laurenceb> he should get a second pass
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[13:37] <amell> Public announcement: im not soldering SMA pigtails again
[13:39] <mattbrejza> http://uk.farnell.com/lprs/rg174-300mm/cable-rg174-300mm/dp/2096226
[13:40] <amell> 403 - Your Request Was Denied
[13:40] <mattbrejza> 2096226
[13:40] <mattbrejza> weird
[13:40] <daveake> works here
[13:40] <mattbrejza> http://uk.farnell.com/rg174-300mm/cable-rg174-300mm/dp/2096226 better?
[13:41] <amell> nope
[13:41] <daveake> and yes, at that price (probably cheaper than the bits), don't bother making them
[13:41] <amell> farnell have problems -
[13:41] <mattbrejza> just search for that part number
[13:41] <amell> my guess is one of the backend servers is bad.
[13:41] <daveake> Not as bad as RS
[13:42] <amell> it was a premade cable. I cut the GSA connector off and stripped it back
[13:42] <amell> double vision half the time, too tiny.
[13:42] <daveake> Search for "Raspberry Pi Model A" get 74 items; fail to find the correct 1; give up
[13:42] <daveake> Farnell cheaper anyway
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[13:46] <amell> Nice to see B-62 pass Astana, Kazakstan
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[13:51] <mfa298> I don't think I've ever soldered an sma connector - Crimp always for that size
[13:53] <mfa298> although annoyingly the MCX connectors I've got seem to need a smidge of solder on the pin as it's too small to crimp
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[13:55] <gonzo___> sma on ut141
[13:55] <amell> http://i.imgur.com/2KUkVVX.jpg - cut the GSA connector end off and tin and solder the wire and screen to PCB
[13:56] <mfa298> that's just soldering wires, nothing hard there.
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[14:29] <Maxell> Did a clamp N connector today. Very easy!
[14:33] <gonzo___> they are the future
[14:34] <SpeedEvil> Bananna plugs all the way
[14:34] <gonzo___> and have been for decades
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[14:34] <SpeedEvil> Ideal for everything, mains, headphone connectors, ECG leads
[14:34] <gonzo___> and the shilded version of the 4mm plug, the pl259
[14:35] <gonzo___> I think I only have one bananna plug in my whole radio system
[14:36] <craag> Yeah pl259 is rubbish, use belling-lee!
[14:36] <mattbrejza> ethernet
[14:37] <gonzo___> where you are forced to use pl259, you can now get clamp types. At least that makes the cable end reliable
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[14:42] <mfa298> I've been using clamp type pl259 (when needed) for years.
[14:43] <mfa298> I think the only non-clamp types ones are in some of the commercial patch cables I've got :S
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[15:05] <tweetBot1> @Project_HAB: How I solved an AVR Timing issue with a lot of friends help: http://t.co/YccAt5QYnM #hamr #ukhas
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[15:13] <mikestir-work> ping fsphil
[15:15] <fsphil> pongish mikestir-work (may be slow to answer)
[15:16] <mikestir-work> just wondered if you'd seen this new PIC32MZ series? 2MB flash, 512K SRAM (on chip), MIPS core with DSP extensions, DMA, parallel master/slave port, available in 64-pin package
[15:16] <mikestir-work> sounds like an SSDV payload to me
[15:16] <adamgreig> PIC you say
[15:16] <adamgreig> here's a pound, buy yourself an stm32?
[15:16] <mattbrejza> ewwwwwwww PIC :P
[15:16] <mikestir-work> I know that was my initial thought
[15:16] <mikestir-work> but it has the on chip SRAM that all the cortexes lack
[15:17] <mattbrejza> how do they compare with the the stm32f4s, which i guess are most similar?
[15:17] <mikestir-work> and it's a MIPS PIC, not a nasty one
[15:17] <adamgreig> actually yea that 512K of RAM is nice
[15:17] <adamgreig> the F4s go up to 256K RAM I think?
[15:17] <fsphil> you said the magic word mikestir-work :)
[15:17] <mikestir-work> largest F4 I think is 256K which is pushing it a bit for a QVGA YUV framebuffer and still leaving room for jpeg encoding
[15:18] <adamgreig> (they do)
[15:18] <adamgreig> that is quite nice then
[15:18] <mattbrejza> yrs seeems 256K max
[15:18] <fsphil> yea that 512K is yummy
[15:18] <mattbrejza> how much for that?
[15:18] <mikestir-work> 7 quid one off
[15:18] <adamgreig> saves having to use a big package to get the FSMC to hook up external ram too
[15:18] <adamgreig> not bad
[15:18] <mattbrejza> same area as the stm32f4s
[15:19] <adamgreig> cheaper than the 256k ram f4s I think
[15:19] <mattbrejza> they do have a 6MSPS ADC on them
[15:19] <adamgreig> :P
[15:19] <fsphil> 375KB required for 640x480 YUV 4:2:2 frame iirc
[15:19] <adamgreig> 512 starts looking quite nice then
[15:19] <mikestir-work> it caught my eye and I thought I'd mention it. could always scrape off the microchip logo
[15:20] <adamgreig> haha
[15:20] <adamgreig> nothing a little acetone won't fix
[15:20] <adamgreig> MIPS is not bad either. but idk about the toolchains and compilers?
[15:20] <adamgreig> surprised ST don't have much with more RAM
[15:20] <fsphil> yea linux support would be critical
[15:20] <mikestir-work> presuambly gcc
[15:21] <mikestir-work> and the jlink appears to support it for programming
[15:21] <adamgreig> is it plain mips? gcc'l do that I guess
[15:21] <adamgreig> nice
[15:22] <mattbrejza> although if you just want the sram you might as well use an avr with an external memory bus and a sram ic?
[15:22] <mattbrejza> no idea how long itll take to do the encoding on an avr though
[15:22] <adamgreig> yea but that's slow and takes a lot of pins
[15:22] <adamgreig> well I guess with an avr you only need an 8 way data bus anyway :P
[15:22] <adamgreig> but still need a bigger address bus, so..
[15:22] <mikestir-work> I was thinking about one of the mid-range (but still low pin count) kinetis M4s with DMA, and external SPI SRAM
[15:23] <adamgreig> I suppose for ssdv the ram access is probably not super important
[15:23] <mikestir-work> depends on the image sensor
[15:23] <adamgreig> well... you need to be able to dump the image into ram
[15:23] <adamgreig> yea
[15:23] <adamgreig> many lack onboard ram entirely huh
[15:23] <adamgreig> SPI can run pretty fast at least
[15:23] <adamgreig> for the price this might be (much as I hate to say it) where an rpi works well :P
[15:24] <adamgreig> or something more sensible but a similar idea SoC
[15:24] <mattbrejza> £3.13 for 512KB sram and many pins
[15:24] <mikestir-work> I'm thinking about small rather than cheap here though
[15:24] <mikestir-work> pico ssdv
[15:24] <adamgreig> ah cute
[15:24] <adamgreig> yea then, fair
[15:24] <mattbrejza> i thought most cameras had the jpeg thing built in?
[15:24] <mikestir-work> small and cheap would be a bonus
[15:24] <mikestir-work> no hardly any do
[15:24] <adamgreig> only the very expensive and quite large ones do
[15:25] <mikestir-work> there's an aptina module that does, but the really small low cost usually just give you raw bayer out
[15:25] <mikestir-work> some will give you a 422 interleaved YUV byte stream with the exposure and gamma done
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[15:27] <mattbrejza> do you need to store the entire buffer at once though? transfer a sqaure, encode it to be smaller, store it and do the next square?
[15:27] <mfa298> surely stick PICAXE on it as that's all the rage (/me dons fireproof suit and ducks)
[15:27] <mikestir-work> if you can do it in real time then you might be able to do 1 macroblock high patches
[15:27] <mattbrejza> do you have to steam data out of the camera at a certian rate?
[15:28] <mikestir-work> usually, otherwise it mucks up the exposure
[15:28] <mikestir-work> most are rolling shutter
[15:28] <mattbrejza> ok
[15:29] <mikestir-work> stick a picaxe on to stand in the corner and blink an led
[15:29] <fsphil> avr wouldn't be fast enough to read a typical cmos sensor output
[15:29] <fsphil> external ram wouldn't help
[15:29] <mikestir-work> arm would though
[15:29] <fsphil> unless you can wire it such that the cmos writes directly to the external ram?
[15:30] <fsphil> then read it from that at a slower pace
[15:30] <mikestir-work> you could put it through a small cpld to accomplish that. it's more complexity though
[15:30] <fsphil> jpeg encoding wouldn't actually be that bad on an avr
[15:30] <fsphil> certainly for typical ssdv speeds
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[16:04] <aadamson> haven't played with it enough to know, but the f42x's do have a graphics accelerator and external memory buss - might be easy enough to add external ram if needed, or maybe the accelerator has the ability to *be creative* with some form of buffering/conversion to mitigate the need for external memory? - http://www.compel.ru/wordpress/wp-content/uploads/2013/11/1_LTDC_ChromeART.pdf
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[16:21] <fsphil> the stm's would be fast enough to do some processing as the data is being read
[16:21] <mikestir-work> jpeg blocks are 16 pixels high right?
[16:22] <fsphil> 8 or 16
[16:22] <fsphil> mostly 16
[16:22] <mikestir-work> if you could do the encode fast enough you'd get away with a pair of 16*width buffers in a ping-pong configuration
[16:22] <mikestir-work> DMA into one from the sensor while encoding the other
[16:23] <mikestir-work> you'd just need to be fast enough to tag the other buffer onto the end of the DMA chain before it was needed
[16:23] <mikestir-work> and obviously the need for DMA requires a half decent processor
[16:24] <fsphil> iirc the f4 has DSP functions that might help
[16:26] <mikestir-work> yes it does. it has some SIMD operations I think, which is even better because you can be doing several blocks at the same time
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[16:33] <Flerb> Ping Upu
[16:33] <Flerb> You can probably guess what its about
[16:35] <Ian_> How does the price and performance of sram stack up to fram and is anyone using fram for HAB projects at the moment.
[16:36] <Ian_> Don't tell me Flerb, you have run out of aliases and want to order more . . . There is currently a sweepstake to guess how many different user names you use between the beginning of June and the Conference .. . :)
[16:39] Action: Flerb writes a script to change my nickname every 20 lines of text
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[16:40] <Flerb> Ian_: well. There's Will, WillTablet, WillPhone, WillSea, and whatever I change my nickname to as a joke on other channels and then realise I'm still in here
[16:42] <Ian_> You will get totally confused with all those aliases, but if I was to be Frank . . . :)
[16:42] <Flerb> Will Salad, Will and Potatoes, Will Kabobs, Will Creole, Will Gumbo
[16:43] <Ian_> Lol, you must seem like a one man crowd scene at times. I guess it makes you difficult to track via usernames. GCHQ are watching!
[16:43] <Flerb> Ian_ 's why I use tor. Or try to. Or maybe I don't.
[16:44] <Upu> whats up will ?
[16:44] <Flerb> Upu: just bought willdover.com
[16:44] <Upu> well done
[16:44] <Upu> thought you had it already
[16:45] <Flerb> That's .co.uk
[16:45] <Flerb> Could I err possibly try and switch it somehow? I'm not sure how I'd do it.
[16:45] <Upu> done
[16:46] <Upu> parked on the .co.uk
[16:46] <Upu> afk
[16:47] <Flerb> Wait what?
[16:47] <Flerb> Erm I forgot why I called it will's warblings
[16:47] <Flerb> I probably thought it meant something else
[16:49] <Flerb> Upu: come to think of it I think I'll start that blog up again
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[16:51] <Flerb> I just realised I've been procrastinating about the payload for almost a year now :-\
[16:54] <mfa298> must be time to get on and build it then...
[16:54] <daveake> a year is nothing - we've seen worse :)
[16:55] <Flerb> mfa298: I think it might be best to go with arduino this time round
[16:55] <Ian_> Like in the breakfast cerial aisle in the supemarket, so many choices of great flavoured kit keep coming along and distracting.
[16:56] <Flerb> Oh and BTW I think I'm possibly going to deliberately stop the cs course, well, I'm not going to pay attention to the 31st December deadline
[16:56] <Flerb> I realised I can do most of the psets this year, resubmit them next year so then I have a year on the final project
[16:59] <mfa298> word of warning, whilst you might be able to do that for an online course, Often with Uni modules whilst you may be able to retake them the score that usually counts towards the final degree is the one from first time around. So it's not a good habbit to get into.
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[16:59] <Flerb> mfa298: true. I can't imagine the stress of doing it in 6 weeks
[17:00] <Flerb> Wait no its twelve
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[17:01] <mfa298> that's a decent amount of time for a project
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[17:03] <Flerb> mfa298: no, the course
[17:04] <SA6BSS> b-62 new update ??
[17:05] <mfa298> 12 weeks for a course sounds similar to what you get for a uni module (although I'm no sure how a 31st dec deadline fits in with a 12 week course)
[17:06] <mfa298> SA6BSS: I believe there were some updates earlier today from an audio clip sent to Leo
[17:07] <mfa298> and it looks like there might have been another point added recently - I hadn't spotted that
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[17:09] <LeoBodnar> got two APRS packets recordings sent in by UN9PQ
[17:10] <LeoBodnar> so I have uploaded them to B-62 telemetry
[17:12] <LeoBodnar> B-62 went north, made a loop and came back to the same guy in TEMIRTAU http://ready.arl.noaa.gov/hypubout/18083_trj001.gif
[17:13] <SA6BSS> ok, that explains it.
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[17:41] <arko> do a barrel roll!
[17:42] <mattbrejza> talking of barrel rows it seems ISEE3's spinup is due soon
[17:43] <mattbrejza> *rolls
[17:43] <arko> ooo
[17:46] <SA6BSS> https://mobile.twitter.com/ISEE3Reboot
[17:46] <SA6BSS> I love this isee3 project :)
[17:47] <SpeedEvil> https://www.youtube.com/watch?feature=player_detailpage&v=S35PVCjyL8g#t=178 - tool porn.
[17:48] <arko> i really hope it spins up
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[17:51] <arko> "B transponder locked #ISEE3"
[17:51] <arko> nice work LeoBodnar
[17:55] <Laurenceb__> ~1 minute lag?
[17:56] <Laurenceb__> have they fired the thrusters before?
[17:57] <aadamson> probably about 30 years ago :)
[17:57] <SpeedEvil> This is the first thruster firing by the non-NASA team
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[17:57] <SpeedEvil> Or may be
[17:57] <arko> the question really is.. will it fire?
[17:58] <arko> did the telemetry show fuel tank pressure?
[17:58] <aadamson> they only got comm, what a week ago or there abouts
[17:58] <jcoxon> evening all
[17:59] <arko> evening
[17:59] <SpeedEvil> Evening
[18:01] <SpeedEvil> arko: yes, it does
[18:01] <arko> oh awesome
[18:02] <SpeedEvil> http://spacecollege.org/isee3/isee-3-propulsion-system-overview.html
[18:02] <SpeedEvil> Most fun thing. It has no computer. At all.
[18:02] <arko> oh sweet!
[18:02] <arko> good link
[18:03] <jcoxon> go ISEE3
[18:04] <arko> Thruster select A&B is valid #ISEE3
[18:04] <arko> nice
[18:04] <mfa298> that's quite a testament to doing engineering and maths properly
[18:04] <SpeedEvil> Indeed
[18:05] <arko> 2-Axis Moment of 430.85 slug-ft2 Inertia
[18:05] <arko> yuck
[18:05] Action: SpeedEvil passes arko the slug killer.
[18:05] <mfa298> I quite like the news paper clip on http://spacecollege.org/isee3/news-older/
[18:06] <cm13g09> mfa298: paperclip?
[18:06] <cm13g09> oh...
[18:06] <cm13g09> newspaper clip :P
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[18:06] Action: cm13g09 is having a bad day lol
[18:08] Action: mfa298 should probably head in a homewards direction
[18:09] Action: cm13g09 is already home.....
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[18:12] <Laurenceb__> when will they actuall fire this thing...
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[18:12] <aadamson> next command is initiate according to the twitter feed
[18:12] <Laurenceb__> they need some sort of web gui showing spacecraft status
[18:12] <Laurenceb__> imagine if we used twitter for hab telemetry
[18:13] <aadamson> yep, had the exact thought
[18:13] <aadamson> kinda like watching paint dry via twitter
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[18:14] <mattbrejza> what are they using to talk to it? not on the dsn anymore
[18:15] <aadamson> arecibo
[18:16] <aadamson> oh, but the suspense!!! lol
[18:16] <mattbrejza> not the 300m one?
[18:17] <aadamson> they didn't say which, just that they had time on arecibo and this is happening right after that
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[18:18] <Reb-SM3ULC> evevning
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[18:20] <Joekul> hi there. I was hoping for CARS1 to head to Switzerland, but it stopped half-way...
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[18:25] <Reb-SM3ULC> wow, B62 called back
[18:25] <arko> et phoned home
[18:26] Action: Reb-SM3ULC still looking for aprs-decoder software
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[18:27] <jcoxon> hmmm aprs.fi says its via 2EOTOY
[18:28] <Reb-SM3ULC> Jul 02 20:20:32 M0XER-2>APRS62,WIDE2-1,qAS,2E0TOY:!/5&F8`4)SO G14g/A=038500|JEJN!!:A!(|
[18:29] <jcoxon> what does that mean?
[18:29] <mikestir> someone sent leo a recording and he decoded it
[18:30] <jcoxon> oh i see
[18:30] <jcoxon> nice
[18:30] <aadamson> that 2e0toy is the digi name or alias
[18:31] <aadamson> the sender was m0xer-2 to aprs62, the rest is the gateway/igates
[18:31] <mikestir> it's leo's old intermediate callsign iirc
[18:31] <Reb-SM3ULC> m0xer?
[18:31] <aadamson> no, that's his current one I belive
[18:31] <aadamson> all of his aprs flights are m0xer-??
[18:32] <Reb-SM3ULC> i'm trying to put toghter a script for analyzing distances from aprs receivers to balloons
[18:32] <mikestir> m0xer is his full, 2e0toy is his inter. you can't use the intermediate under cept so the flights would all have to be under m0xer
[18:32] <aadamson> but he did say that someone had emailed hime some missing packets and he had uploaded them
[18:32] <aadamson> mikestir, sent you a PM with question? did you see?
[18:36] <LeoBodnar> 2E0TOY is my intermediate callsign, i use it for non-balloon stuff
[18:36] <arko> watching the twitter feed with the apollo 13 soundtrack
[18:36] <LeoBodnar> the recording was sent by UN9PQ from TEMIRTAU in Kazakhstan
[18:36] <arko> its almost syncing up
[18:38] <jcoxon> cool
[18:41] <aadamson> LeoBodnar, ya need to find one of these for your shelf/garage/etc :) - http://nonf1.com/2012/08/Toy_Lotus_E20.html - to match the call
[18:42] <LeoBodnar> I am pretty sick of F1 atm, we have campers everywhere here.
[18:42] <aadamson> oh are there in the UK this week?
[18:43] <aadamson> s/there/they
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[18:43] <Lunar_Lander> evening
[18:43] <SpeedEvil> e
[18:43] <aadamson> ah indeed... silverstone
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[18:45] <aadamson> OMG and you are right in the middle of all of that... oh boy, I now understand the PAIN
[18:45] <jcoxon> i worry that the isee3 will not fire its thrusters
[18:46] <jcoxon> they've sent this command a number of times now
[18:46] <aadamson> isee3 if first you dont succeed... keep sweeping and trying
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[18:50] <fsphil> ah they're finally at the stage of using the engines?
[18:52] <SA6BSS> jepp, live twitter feed https://mobile.twitter.com/ISEE3Reboot
[18:52] <fsphil> nice
[18:55] <Reb-SM3ULC> LeoBodnar: you have any of any software similar to gpsdecode for aprs? my google-karma seem to have a dent
[18:56] <LeoBodnar> do you mean decoding all the weird formats into clear text?
[18:57] <Reb-SM3ULC> LeoBodnar: yepp
[18:57] <LeoBodnar> have a look at this: https://home.comcast.net/~wb2osz/site/
[18:57] <LeoBodnar> it has a utility that seems to do that
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[19:00] <Reb-SM3ULC> LeoBodnar: ah, thanks! will have a look. noticed oh2mou (i think) received B62 pretty far beyond the horizon. looking to create some database for comparing aprs reachability
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[19:01] <LeoBodnar> Reb-SM3ULC: that would be very cool
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[19:02] <LeoBodnar> I had some really interesting hits at 500+ km from Africa to Spain and 700+ from Rodes to Israel
[19:03] <Reb-SM3ULC> a bit of a challange since the receivers at least have a possibility to move.. so have to correlate nearest position report with received packet from balloon
[19:04] <arko> what's the cheapest gps chip?
[19:04] <arko> doesnt have to have flight mode
[19:04] <LeoBodnar> does it need to work arko ?
[19:04] <arko> lol
[19:04] <arko> yes please
[19:06] <SpeedEvil> arko: chip?
[19:06] <SpeedEvil> Or module
[19:06] <arko> chip
[19:06] <SpeedEvil> What do you mean?
[19:06] <SpeedEvil> There are some preamps I saw for $.30 or so
[19:07] <arko> you know what ublox max7?
[19:07] <arko> thats a gps chip
[19:07] <SpeedEvil> It's a module
[19:07] <arko> oh
[19:07] <arko> fair enough
[19:07] <SpeedEvil> I've seen ones on ebay from about 6 quid
[19:08] <arko> MAX2769 is the lowest cost module i could find
[19:08] <SA6BSS> Good news. Maneuver complete #ISEE3 :)
[19:08] <SpeedEvil> http://www.aliexpress.com/item/Free-Shipping-GPS-module-ublox-u-blox-NEO-6-m-GPS-module-small-GPS-search-star/1905109220.html
[19:08] <SpeedEvil> SA6BSS: Woo
[19:09] <jcoxon> hooray!
[19:09] <fsphil> "Maneuver complete"
[19:09] <arko> woah!!
[19:10] <arko> thats crazy
[19:10] <LeoBodnar> in the dark
[19:12] <fsphil> impressive
[19:12] <fsphil> so that starts it spinning
[19:13] <arko> i can't believe a 30 year old spacecraft was able to do a burn
[19:13] <arko> thats nuts
[19:13] <arko> i mean, im sure it was designed well, but still
[19:13] <arko> wow
[19:13] <fsphil> I wonder if it's the same thrusters needed to put it back in earth orbit
[19:13] <fsphil> or if that's a different untested part
[19:13] <arko> i dont think so
[19:13] <arko> i think they were rotational
[19:14] <Lunar_Lander> ah they tried yesterday already but that didn't work
[19:15] <malgar> ISEE3 great story
[19:15] <fsphil> they seem to be having a lot of communication problems
[19:15] <SpeedEvil> These are rotational thrusters
[19:15] <SpeedEvil> spinning it up to the designed speed before doing translational manoevers
[19:15] <fsphil> wonder if the craft is just a bit deaf, or if it's just the distance
[19:16] <SpeedEvil> Or they're screwing up the protocol a little
[19:16] <SA6BSS> thats the spin up, next thing swing by the moon @ 50km August 10 - that will be exiting
[19:16] <MightyMik> the doppler shift makes it tricky i think
[19:16] <jcoxon> more twitter pain
[19:16] <fsphil> 50km?!
[19:16] <SA6BSS> yepp, 50km
[19:17] <fsphil> I hope they get the aim right
[19:17] <SA6BSS> indeed!!
[19:17] <fsphil> shame it has no cameras
[19:18] <SpeedEvil> Indeed.
[19:18] <SpeedEvil> But - well - some of the fields and particles stuff is interesting
[19:19] <bertrik> wow, just reading up on ISEE3, this is amazing
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[19:22] <Lunar_Lander> btw how are the rules
[19:22] <Lunar_Lander> is ISEE3 only on lease from NASA or something?
[19:23] <fsphil> apparently NASA donated it to the Smithsonian Museum
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[19:24] <fsphil> wonder what other spacecraft are sitting out there idle
[19:27] <fsphil> DS-1 is still functional
[19:27] <fsphil> "on-board communications remain active in case the craft is needed in the future"
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[19:38] <malgar> I'm sure that in some years someone will hijack a Leo's balloon still alive and flying :P
[19:39] <Lunar_Lander> ah
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[19:47] <LeoBodnar> not mine, i am reusing old CNES balloons myself
[19:48] <jcoxon> hehe i've flown CNES balloons
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[20:54] <Reb-SM3ULC> LeoBodnar: worked fine! thanks!!!
[20:55] <Reb-SM3ULC> LeoBodnar: some effort by the guy!
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[20:58] <malclocke> I'm contemplating designing an arduino pro mini shield with Si4464 + ublox + step up + sensors. Is this a crazy idea?
[20:59] <aadamson> 64?
[20:59] <aadamson> that has a different frequency range that the 0-3's
[21:00] <malclocke> yeh, end game is for APRS capability
[21:00] <aadamson> https://dl.dropboxusercontent.com/u/6730484/DSCN2416.JPG
[21:00] <aadamson> that is a pro-mini board I did (altho that's an stm32f3 pro-mini clone next to it)
[21:00] <aadamson> aprs via vcxo on that one
[21:01] <aadamson> I should say afsk via vcxo
[21:01] <malclocke> and I thought I was being innovative :)
[21:02] <aadamson> and not sure why you'd use a 64, its higher current demand and aprs is 144mhz so 142 works just fine
[21:03] <aadamson> 142 bottom end in the 0-3's
[21:03] <aadamson> and you'd probably want to use the 40's not 44's... unless you are going to do something with the RX (44's have TX/RX, 40's TX only)
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[21:05] <malclocke> APRS implementations are technically supposed to listen to ensure they don't clobber other TX aren't they? although I guess that's kind of irrelevant at such low power.
[21:06] <aadamson> malclocke, I guess while on topic. I fly in the US on 10mW (10dbm) and have NO issues with coverage, and with the EU guys and the ISM band limit, and the limits on airborne transmitters, not sure the 63/4 is a good option there either :)
[21:07] <aadamson> *I know of NO tracker* - HAB or other that *listen* first.... little known secret to aprs (probably not so unknown)
[21:07] <malclocke> :)
[21:07] <LeoBodnar> cool Reb-SM3ULC
[21:09] <LeoBodnar> there is no secret
[21:10] <LeoBodnar> listen before talk is not in the standard
[21:10] <qyx_> but for 433MHz it is
[21:10] <qyx_> at least in etsi and higher power levels
[21:10] <qyx_> with 100% duty
[21:11] <LeoBodnar> but that's irrelevant to the APRS discussion?
[21:11] <aadamson> LeoBodnar, hehe ^
[21:11] <qyx_> ah aprs, sorry, offtopic
[21:12] <aadamson> wasn't picking on you qyx_, my chuckle was to the *listen before talk not in the standard* comment
[21:13] <qyx_> np, i understood :)
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[21:25] <malclocke> aadamson, is the design for your pro mini board public?
[21:27] <Maxell> LeoBodnar: well most TNCs support the short buffer before shooting
[21:27] <Maxell> But that won't even work at such altitudes :P
[21:33] <aadamson> malclocke, it's here I think, it needs some updates after LeoBodnar helped me make it work the first time around (one to fix a component placement the other to fix an interface to Xin usage - just component related, no design)
[21:33] <aadamson> malclocke, https://github.com/akadamson/STM32-TX/tree/master/SIradio
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[21:44] <S_Mark> Hi guys, I'm looking for a super cheap hand held radio scanner for HAB use - any suggestions?
[21:46] <Reb-SM3ULC> dvb-dongle? :)
[21:46] <S_Mark> not dongle - have one already
[21:47] <S_Mark> Like would this be any good http://www.ebay.co.uk/itm/Uniden-Bearcat-EZI33-XLT-Handheld-Radio-Scanner-Airband-VHF-UHF-FM-Compact-/281176941113?pt=UK_ConsumerElectronics_SpecialistRadioEquipment_SM&hash=item417773a239 ?
[21:48] <craag> S_Mark: Nope, won't do ssb
[21:48] <craag> There's a selection you can get, such as a yupiteru, iirc
[21:48] <craag> but they're not 'super cheap'
[21:49] <craag> eg http://www.ebay.co.uk/itm/Yupiteru-MVT-7100-1000-Channel-Receiver-complete-kit-/251570591035?pt=UK_ConsumerElectronics_SpecialistRadioEquipment_SM&hash=item3a92c6953b
[21:50] <S_Mark> Ah was just on that one
[21:50] <craag> They're not great compared to ft817,ft790
[21:50] <craag> and also are a bit of a pain to tune (no tuning dial iirc)
[21:50] <craag> but they'll work
[21:51] <S_Mark> ok, I'll do a bit more looking into it - thanks v much for suggestions
[21:51] <S_Mark> I wish there was an alternative to GQRX on Mac OSX
[21:51] <S_Mark> Is there??
[21:51] <craag> nope
[21:52] <craag> windows/sdr# is the nearest thing
[21:52] <S_Mark> Yeah I like that, I have put win 8.1 on parallels on the mac for it before
[21:52] <S_Mark> well actually still on there
[21:52] <Lunar_Lander> hi S_Mark
[21:53] <S_Mark> hi Lunar_Lander
[21:53] <Lunar_Lander> craag, I got that one
[21:53] <Lunar_Lander> but under the Stabo brand
[21:53] <Lunar_Lander> you have a tuning knob on them but otherwise only the keypad
[21:53] <craag> ASTRA here at uni have one or similar
[21:54] <craag> But I'll I've heard is matt complaining about it :P
[21:55] <Reb-SM3ULC> LeoBodnar: tried aprs on 70 cm? in the qrm cloud...
[21:55] <Lunar_Lander> xD
[21:55] <Flerb> I was thinking about our cctv idea and I wonder if there's a way to interface with motion such that it turns on a few IR LEDs
[21:55] <LeoBodnar> yes I have tried both SSB and FM APRS on 434
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[22:11] <SpeedEvil> Flerb: motion is trivial - it can do arbitrary scripts on motion
[22:12] <Flerb> SpeedEvil: oh
[22:12] <Flerb> Right.
[22:13] <Flerb> So I think the plan is to have a daemon monitoring the directory that motion saves to.
[22:13] <Flerb> Wait, I need it such that I'll only try and sync it once it has finished recording
[22:14] <Flerb> So it uploads it to an ftp server, deletes it locally, and then removes them from the server after 2 or 3 days
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[22:21] <mfa298> mvt7100 uses one of the knobs on the top for tunning but it's not the best of things and it's a bit of a faff changing the tunning step all the time
[22:22] <mfa298> although I've been spoilt with having real rigs to use as well where you can also take a seperate audio feed out that doesn't cut out the speaker so you can hear what's happening
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[23:01] <Lunar_Lander> good night
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[23:11] <amell> great news on ISEE-3
[23:13] <amell> There is another tuner app for mac.
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[23:13] <amell> its called SDRdx
[23:13] <amell> i find it too confusing. zillions of buttons
[23:20] <Reb-SM3ULC> mm
[23:20] <Reb-SM3ULC> slight multipsk-feeling
[23:21] <fsphil> urg
[23:21] <fsphil> http://ssdv.habhub.org/ -- long range SSDV over HF :)
[23:23] <Reb-SM3ULC> cool
[23:24] <Reb-SM3ULC> ssdv is great
[23:24] <Reb-SM3ULC> i would like to see it on a cubesat
[23:25] <fsphil> me too :)
[23:25] <fsphil> though perhaps using something better than rtty
[23:25] <Reb-SM3ULC> sure, but just the packetized idea is great. instead of some d-sstv etc
[23:26] <fsphil> d-sstv is seriously overengineered
[23:27] <fsphil> that said a decent replacement for rtty would probably be as complicated at the modem level
[23:30] <Reb-SM3ULC> if one just keep the "L2" from "L3" it shoudl be interchangable
[23:30] <Reb-SM3ULC> noticed funcube runs 1200 baud bpsk
[23:31] <Reb-SM3ULC> fldigi has no custom option for bpsk..
[23:31] <fsphil> it was a custom mode developed for funcube
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[23:42] <Reb-SM3ULC> aah, didn't know
[00:00] --- Thu Jul 3 2014