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[00:07] <Laurenceb_> http://powercartel.com/2015/02/test-results-for-lg-inr18650-mj1-3500mah-18650-li-ion-battery/
[00:07] <Laurenceb_> li-ion reaches 1MJ/Kg
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[00:28] <SpeedEvil> Interesting
[00:31] <SpeedEvil> readily available li-po is close tothat though
[00:31] <SpeedEvil> http://www.hobbyking.com/hobbyking/store/__55805__Multistar_High_Capacity_Lightweight_8S_12000mAh_2C_Multi_Rotor_Lipo_Pack.html
[00:33] <SpeedEvil> (930)
[00:38] <Laurenceb_> I get more like 0.9
[00:39] <Laurenceb_> but yeah thats very high
[00:39] <Laurenceb_> if its real....
[00:40] <Laurenceb_> the specs for li ion is about 1.05MJ/Kg, but that LG stuff is the first with real world test data over 1MJ
[00:42] <SpeedEvil> Of course, bigger cells would be better
[00:45] <Laurenceb_> in theory, but 18650 seems to beat everything, probably because of tesla
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[00:51] <SpeedEvil> I guess.
[00:52] <SpeedEvil> Have powerwalls started shipping?
[00:52] <SpeedEvil> I'd have expected people to be breaking them for ebay
[00:52] <Laurenceb_> those energy storage things?
[00:52] <Laurenceb_> I doubt it, sounds like a case of Elon smoking weed again
[00:52] <Lunar_Lander> good night
[00:53] <SpeedEvil> At the quoted prices, it would be great bargains for first-line 18650s
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[00:55] <SpeedEvil> Is it useful for on-grid - well - no
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[07:19] <Vaizki> If the powerwall had started shipping I would have seen a teardown...
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[08:24] <SA6BSS-Mike> ubseds13 picking up speed , running at 130km/h now
[08:26] <eroomde> a beeline for sochi
[08:29] <Vaizki> -26.. I wouldn't mind Sochi myself.
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[08:44] <fsphil> it can't get that cold. you must be reading it wrong
[08:53] <x-f_> average air temp in Finland this January so far is -18.3, coldest January since 1987
[08:53] Nick change: x-f_ -> x-f
[08:56] <R34lB0rg> I'd love to see climate "protectionists" in swimming trunks in finland today
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[08:57] <fsphil> you are so weird
[08:58] <R34lB0rg> asking them to spell "global warming"
[09:00] <SM0ULC-Reb> morrn
[09:00] <fsphil> g'morn
[09:01] <R34lB0rg> fsphil, I already had two flat-earth believers for breakfast, so don't call me weird ;)
[09:01] <x-f> global warming actually means climate change - some places get warmer, some colder, weather becomes more extreme, changes are quicker, storms are stronger
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[09:04] <SM0ULC-Reb> Vaizki: yummu -13 here. no nead for extra clothes!
[09:06] <fsphil> top temp of 11c here today. practically spring already
[09:07] <SM0ULC-Reb> Vaizki: still only like 10 cm snow on the ground. not much.. :(
[09:08] <R34lB0rg> fsphil, that's why you can still believe in global warming
[09:08] <AndyEsser> Good morning lovers of large inflatable latex things
[09:08] <Vaizki> well it's a lot colder is some places, I am in the south here
[09:08] <R34lB0rg> moin AndyEsser
[09:08] <Vaizki> SM0ULC-Reb: well we have maybe 50cm now
[09:09] <SM0ULC-Reb> Vaizki: whats the record this winter? i think it's -41 in sweden
[09:09] <SM0ULC-Reb> Vaizki: nice!
[09:09] <Vaizki> -38.2 here
[09:10] <Vaizki> I think..
[09:10] <Vaizki> no -40.7 actually
[09:10] <Vaizki> for this winter
[09:12] <SM0ULC-Reb> chilly :)
[09:13] <Vaizki> at -25 already you can throw hot water into the air and it will turn into snow instantly
[09:13] <fsphil> you should all move somewhere warmer :p
[09:14] <AndyEsser> fsphil: bah -38 is t-shirt and shorts weather!
[09:15] <SM0ULC-Reb> Vaizki: quite a while since i endured some << -30. Went downhill skiing once in Åre with -32 but after two laps they closed the ski lift.
[09:16] <SM0ULC-Reb> Vaizki: the cold gets a bit weird when all the moisture is gone
[09:16] <gonzo_> reminds me of the three eskimos joke (though it doesn't work well without the sound effects, so not one for IRC)
[09:16] <Vaizki> downhill skiing at -30 and below is not only painful but also dangerous
[09:17] <R34lB0rg> fsphil, i'd love to live somewhere near the equator
[09:17] <AndyEsser> so move?
[09:19] <SM0ULC-Reb> Vaizki: you should not do if not prepared no.. and not that fun with the all the clothes on.. which makes go faster wich makes it even more colder... so, better stay inside and solder/code som funka suttf :)
[09:20] <SM0ULC-Reb> should build a ukhas-node to monitor heating of the car...
[09:20] <Vaizki> have done it once, was very well prepared (and much younger) but it was still not even close to being fun
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[10:30] <craag> Heads-up: UK hab flight with rtty+lora on 434.300, ~midday sunday :)
[10:31] <chris_99> ooh nice :)
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[10:32] <chris_99> rtty+lora being on the same frequency?
[10:33] <craag> yes
[10:33] <daveake> wot no morse? :p
[10:33] <craag> 3 rtty then burst of lora, and loop, fldigi copes with it fine
[10:33] <craag> hah
[10:34] <chris_99> haha daveake
[10:34] <chris_99> cool craag, didn't know that'd work
[10:34] <daveake> a brief burst will be fine
[10:34] <daveake> dunno what it'd make of a long packet tho
[10:35] <craag> if it's drifting it may lose it
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[10:35] <daveake> suspect it'd drift off as it tries to auto-tune
[10:35] <craag> yeah
[10:36] <fsphil> craag: pico?
[10:36] <craag> fsphil: no, latex
[10:36] <daveake> ooer
[10:36] <fab4space> hello all
[10:36] <eroomde> g'morning fab4space
[10:37] <fab4space> new lora gateway board for RPI
[10:37] <fab4space> http://link-labs.myshopify.com/products/lorawan-raspberry-pi-board
[10:37] <daveake> actually Sunday doesn't look bad for landing predictions
[10:37] <AndyEsser> craag: will try to track if I can :)
[10:37] <fab4space> with SX1301 instead of sx1276 which make it a true gateway
[10:37] <fab4space> but only for 868Mhz yet :)
[10:38] <daveake> tad windy for launch
[10:38] <craag> Thanks AndyEsser, will post more details to list when it's confirmed
[10:38] <craag> yes - will be fun :)
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[10:44] <fsphil> craag: finally :)
[10:46] <craag> finally?
[10:46] <fsphil> picos never get high enough to be received here :)
[10:46] <craag> ah!
[10:47] <eroomde> super-pressure high altitudes balloons are still unexplored territory at our level
[10:47] <eroomde> of the sort of reliably lifespan and float that people are getting with picos at least
[10:47] <craag> yes - dunno what size balloon yet (tis an academic launch that Matt and I, as SUSF, are doing the tracking for as of last night)
[10:47] <eroomde> rather than lucking out on a latex for a few days
[10:48] <SpeedEvil> A bit higher than most picos would be nice - out of most of the weather
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[10:52] <R34lB0rg> eroomde, what is super-pressure?
[10:53] <eroomde> what my blood does when you talk
[10:53] <R34lB0rg> 200mm Hg?
[10:54] <eroomde> it's where the envelope stops expanding and is strong enough to take the pressure difference between inside and out R34lB0rg
[10:54] <R34lB0rg> eroomde, i'm not new to physics, i just wonder of how much pressure differential we are talking here
[10:55] <eroomde> it depends on the size of the balloon, the mass of the payload, the altitude
[10:55] <eroomde> i believe the big ones are sort of 150Pa
[10:56] <eroomde> the small picos probably more
[10:56] <eroomde> i have no idea what that is in your stupid furlongs of bitumen units
[10:56] <R34lB0rg> Pascal already is a SI unit
[10:57] <eroomde> yes i know
[10:57] <eroomde> i use SI units
[10:57] Action: R34lB0rg too
[10:57] <eroomde> 10:53:58 R34lB0rg 200mm Hg?
[10:57] <eroomde> that's not an SI unit
[10:58] <R34lB0rg> ever heard of blood pressure in pascal? ;)
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[10:59] <eroomde> mmm because medics are famed for their science
[11:00] <R34lB0rg> so it's about the pressure differential of a vacuum cleaner or less
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[11:01] <eroomde> wikipedia says a domestic vacuum cleaner creates about 20kPa in the hose
[11:02] <eroomde> which is about 133 times more than the number i gave you for nasa superpressure balloons
[11:02] <R34lB0rg> yeah, I had 5mbar in mind from my own
[11:02] <eroomde> i should say, it reduces the pressure in the hose by about 20kPa
[11:03] <eroomde> will you just stick to pascals
[11:03] <eroomde> jesus
[11:03] <eroomde> infact
[11:03] <eroomde> stop talking
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[11:06] <R34lB0rg> ok, sorry, mine has 17000 pascal too
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[11:14] <SM0ULC-Reb> fab4space: kinda pricey boards?
[11:14] <daveake> Well those a lorawan gateways, so they're a lot more complex than a plain lora transceiver board
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[11:16] <SM0ULC-Reb> aah
[11:19] <fab4space> yes it is not a transceiver SM0ULC-Reb and it can receive many tx in // (with different SF, frequencies,..)
[11:37] <Vaizki> and not only many frequencies but also overlapping chirps
[11:38] <Vaizki> not sure if the basic chipsets can really handle them very well
[11:39] <Geoff-G8DHE> Hope that is just a glitch in the data for the height for UBSEDS13 ? Itwa doing OK.
[11:40] <AndyEsser> Geoff-G8DHE: it got shot down crossing the russian border
[11:40] <Vaizki> wow slight chance that PS-58 is coming to europe
[11:41] <Geoff-G8DHE> Rather looks like a fast failure :-( but might just be some bad data as its coming via APRS.
[11:43] <Vaizki> the data doesn't look right
[11:43] <Geoff-G8DHE> Oh yes on PS-58! further across than PS-57 made it !
[11:43] <Vaizki> -29 outside temp at 13 meter altitude?
[11:43] <Vaizki> it's sochi, not finland!
[11:44] <Geoff-G8DHE> Its 5C over there at present
[11:45] <Vaizki> if it's down it basically landed in the olympic ski slope
[11:45] <Geoff-G8DHE> Oh nyes just zoomed in!
[11:48] <Vaizki> if PS-58 could just get to Florida latitudes it would catch the subtropical high trade winds and come over to greet us..
[11:48] <eroomde> honestly thoughi suspect it's come off a nice flat sea right in the caucuses (that go up to 5.5km high) and surfed up the big pressure wave they produce until the envelope has popped
[11:48] <Vaizki> but probably the equatorial low pressure band will suck it back in
[11:48] <eroomde> Caucasus*
[11:49] <Geoff-G8DHE> Don't think it surfed much http://360.g8dhe.net/HAB_Flights/2016_Flights/UBSEDS13_20160120/UBSEDS13_20160121221141.jpg
[11:50] <Vaizki> the continous transmitting would also possibly indicate a landing and activating recovery mode?
[11:50] <Geoff-G8DHE> it was nice and consistent until over the Coast, but it might have burst betwween telemetry returns.
[11:50] <Vaizki> but the data looks weird
[11:50] <AndyEsser> soo... road trip?
[11:50] <AndyEsser> :)
[11:50] <Vaizki> the last 20 mins
[11:51] <Vaizki> yea russia is just a 2hour drive away
[11:51] <Vaizki> for me
[11:51] <AndyEsser> Part of me would actually very much for chasing across europe + asia
[11:51] <eroomde> sochi probably further
[11:51] <AndyEsser> someone make a floater and pay me to chase it
[11:51] <AndyEsser> :)
[11:51] <Vaizki> sochi.. 33h
[11:52] <Vaizki> not that I would like to drive along the eastern border of Ukraine
[11:56] <R34lB0rg> at least not unarmed
[11:57] <AndyEsser> R34lB0rg: going up to the border of Ukraine whilst armed is more likely to get your shot, than being unarmed
[12:01] <richardeoin> it looks like the gps on UBSEDS13 is glitching away
[12:01] <richardeoin> from 10:19:08 the altitude is pretty wrong
[12:02] <eroomde> i want the caucasas explosion hypothesis to be true
[12:02] <eroomde> it's more interesting that an firmware bug
[12:02] <richardeoin> if it came down then I don't see how it could have been received by YM7s 200km away
[12:03] <richardeoin> yes, mountain lee waves are interesting eroomde
[12:03] <richardeoin> significant contributor to the envelope supepressure
[12:04] <eroomde> or some waggish hypothesis about drinking tea
[12:04] <SpeedEvil> richardeoin: mountain?
[12:04] <SpeedEvil> richardeoin: I mean - it's sitting on a mountain
[12:05] <richardeoin> so mountains generate waves in the air flowing over them
[12:06] <richardeoin> particularly after the air has gone over them (lee waves) where they can constructively interfere
[12:07] <richardeoin> there's a famous case of a cargo aircraft having its engine ripped off over the rockies
[12:07] <richardeoin> http://www.vets.ucar.edu/vg/CAT/
[12:11] <richardeoin> in any case it's not 700m underground in a mountain while still being received across the black sea
[12:11] <richardeoin> I suspect the SE880 just needs more babysitting
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[12:33] <R6mco> is USEDS13 APRS telemetry on normal 144.800 MHz ?
[12:34] <lz1dev> .aprs ping USEDS13
[12:34] <SpacenearUS> 03lz1dev: No matches found
[12:35] <Geoff-G8DHE_> .aprs ping ubseds13
[12:35] <SpacenearUS> 03Geoff-G8DHE_: No matches found
[12:35] <Geoff-G8DHE_> .aprs ping UBSEDS13
[12:35] <SpacenearUS> 03Geoff-G8DHE_: No matches found
[12:36] <lz1dev> its just not on it
[12:36] <lz1dev> calm down
[12:36] <Geoff-G8DHE_> I will I will was getting all jittery and fluttery then ;-)
[12:37] Nick change: Geoff-G8DHE_ -> Geoff-G8DHE-Lap
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[13:43] <chris_99> just got an email about this http://ukseds.org/nssc2016/ which might be of interest to someone (national student space conference)
[13:45] <IUBAVM> Geoff-G8DHE and Upu - I'm back if you have any more guidance on how I can best lock in the right signal. images of signals here: http://imgur.com/a/ttWB4
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[13:46] <UpuWork> try that peak to the right
[13:46] <UpuWork> and lets see dl-fldigi pls
[13:47] <lz1dev> UpuWork: whats the deal with ubseds13?
[13:47] <lz1dev> does aprs on regular freq?
[13:47] <UpuWork> I believe so yes
[13:48] <lz1dev> under what callsign?
[13:49] <UpuWork> .aprs list
[13:49] <SpacenearUS> 03UpuWork: Tracking via APRS: 03DK3SB-10, 03DK3SB-8, 03KD5ZPL-11, 03KD9DBI-11, 03KG5KNM-11, 03M0SBU-11 10(UBSEDS13), 03M0UPU-7, 03M0UPU-8, 03M0UPU-9, 03SP3OSJ-12
[13:49] <UpuWork> M0SBU-11 (UBSEDS13)
[13:49] <IUBAVM> it's very strange - if I move or touch the desk my computer is on then those other signals go away and just become static
[13:49] <lz1dev> derp
[13:50] <lz1dev> .aprs ping M0SBU-11
[13:50] <SpacenearUS> 03lz1dev: Latest contact: 03M0SBU-11 10(3 hours ago)
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[13:50] <lz1dev> .aprs info M0SBU-11
[13:50] <SpacenearUS> 03lz1dev: 03M0SBU-11 was near 03gorod-kurort Sochi, Krasnodarskiy kray, Russia 10(43.67195,40.32046) at 0336 meters about 033 hours ago - 12http://aprs.fi/info/M0SBU-11
[13:50] <SpacenearUS> 03lz1dev: Path: 03M0SBU-11>APRS via 03YM9KRZ,WIDE2*,qAR,YM7KA
[13:50] <SpacenearUS> 03lz1dev: Symbol: 03/O
[13:50] <SpacenearUS> 03lz1dev: Comment: 03RA210110z5=!FOV"[Z40T8S;?!'!$
[13:50] <SpacenearUS> 03lz1dev: Telemetry: 03Battery 101.54 Volts 03External Temperature 10-24.2 Celsius 03Internal Temperature 10-2.8 Celcius 03GPS Satellites 105 03GPS TTFF 1012
[13:50] <lz1dev> god knows what that extra stuff is
[13:50] <AndyEsser> Comment is a debug string
[13:50] <AndyEsser> believe it includes the barometric pressure
[13:51] <lz1dev> commend is a riddle
[13:51] <lz1dev> comment*
[13:51] <IUBAVM> http://imgur.com/tw15wiA
[13:51] <AndyEsser> pretty sure richardeoin can decipher if you ask nicely :)
[13:51] <daveake> there country code is in there
[13:51] <daveake> the
[13:52] <lz1dev> aprs.fi broken i think
[13:52] <Geoff-G8DHE-Lap> IUBAVM, Need to see the SDR program as well to see what its tuned to.
[13:52] <lz1dev> i tried to zoom in on the last location to find out hte callsign but nothing
[13:52] <lz1dev> :(
[13:52] <lz1dev> maybe i didnt set the hours
[13:53] <UpuWork> lz1dev play back
[13:55] <IUBAVM> http://imgur.com/rpWv30J
[13:57] <Geoff-G8DHE> Right that only has a single peak in the Audio display lower right, unlikely to be the RTTY signal.
[13:57] <Geoff-G8DHE> Do you have aerials connected to both Tx and Rx and how close together are they ?
[13:58] <Geoff-G8DHE> Go back to the big signal on the Left of the screen.
[13:59] <Geoff-G8DHE> The Dongles are very easily overloaded by srong local signals, its often the case that you will need to remove both aerials if the Dongle and transmitter are close together,
[13:59] <IUBAVM> now the habduino is doing a fast warn blink - possibly low battery? I'll send a pic of my setup
[14:00] <Geoff-G8DHE> otherwise you overload and get rubbish all over the place.
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[14:08] <Geoff-G8DHE> Ohh interesting for PS-58 http://predict.habhub.org/#!/uuid=0c92ed6b4bee7d55f645d92379b7e42ee59f16ea
[14:08] <UpuWork> Adam
[14:08] <UpuWork> sorry IUBAVM
[14:09] <UpuWork> IUBAVM fast blinking is booting should be a steady 1hz red or green
[14:09] <UpuWork> so yes sort that out first
[14:09] <UpuWork> then I can do a remote session through to your mac if you want
[14:09] <IUBAVM> I had this sitting pretty close to the SDR first, now it's across my office (not far), do I need to put farther away? http://imgur.com/Axd1mLz
[14:10] <IUBAVM> yes, if some sort of remote assistance is feasible, that's probably better than going back and forth like this. I really appreciate folks trying to assist in this way!
[14:10] <Geoff-G8DHE> Depends if you move it away you may see a lot of noise and extra signals disappear as the overloading decreases, but I would take up Upu offer of a remote session!
[14:12] <UpuWork> ah
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[14:12] <UpuWork> power habduino from the habduino board
[14:12] <UpuWork> not the Arduino
[14:12] <UpuWork> My regulator is better
[14:15] <UpuWork> and non genuinue Arduino
[14:15] <UpuWork> I am disappoint
[14:16] <IUBAVM> yeah, I had it connected to the Uno before and was having issues, this one was more portable so attached to this. I am trying to find the right connector to power through your board.
[14:16] <UpuWork> was i the box its a PP3 connector with a plug on
[14:17] <IUBAVM> hmmm
[14:19] <IUBAVM> sorry, can you send me a pic?
[14:20] <fab4space> daveake, I have seen your tweet about fast SSDV upload on habitat using your lora gateway
[14:20] <fab4space> what duty cycle/power do you plan to use for sending lora ssdv pics with 250khz BW and SF7?
[14:21] <daveake> 100% and 5mW
[14:22] <fab4space> for HAB?
[14:22] <daveake> yes
[14:22] <fab4space> ok g4
[14:22] <daveake> with an uplink to re-send missing packets
[14:22] <fab4space> 869.7 MHz
[14:22] <fab4space> 870 MHz
[14:22] <fab4space> 7 dBm
[14:22] <fab4space> No requirement
[14:22] <fab4space> 300 kHz
[14:22] <fab4space> sorry for the bad paste guys
[14:23] <eroomde> speaking of bad paste, loctite now make room-temp-storable solderpaste
[14:23] <Geoff-G8DHE> and its life time is ?
[14:23] <UpuWork> 1 sec IUBAVM
[14:24] <Vaizki> maybe their solderpaste also dries in 5 seconds? :)
[14:25] <UpuWork> https://www.dropbox.com/s/5gtwr0our3ufszm/2016-01-22%2014.24.34.jpg?dl=0
[14:25] <fab4space> daveake, do you plan to use a yagi antenna for receiving at this SF7 5mW ? or colinear antenna?
[14:25] <Geoff-G8DHE> Oh not bad 1 year @ 26C http://www.henkel-adhesives.com/loctite-g10-solder-47933.htm
[14:26] <daveake> I have 1 868 Yagi. Not sure exactly what I'll use, but there will be 1 gateway rx only using a habamp, and a separate one that receives and transmits the "repeat these packets..." message
[14:27] <fab4space> ok
[14:28] <fab4space> checking on this doc : http://www.semtech.com/images/datasheet/etsi-compliance-sx1272-lora-modem.pdf it seems that the 250kHz Lora modulation BW is 377.6Khz , and with 125kHzit is 200kHz (pages 15 and 16)
[14:28] <Vaizki> heh, our wind power production feed tariffs got cut because the capacity of subsidized production has been reached.. so now a big wind farm company just announced that they are winding the company down because wind power is not going to be profitable again
[14:28] <Vaizki> of course the building and running of those wind farms has been heavily subsidized through the years
[14:29] <Geoff-G8DHE> Suprise suprise!
[14:29] <fab4space> that 's gonna be a nice setup daveake :)
[14:29] <daveake> it'll be a fun flight
[14:30] <fab4space> maybe it is better to use SF6 with 125kHz for ETSI compliance with g4 band
[14:30] <daveake> possibly
[14:30] <fab4space> and it may have better SNR
[14:30] <daveake> it will
[14:30] <fab4space> but more drift
[14:30] <fab4space> :)
[14:30] <daveake> not enough to worry about
[14:30] <fab4space> yes at 125kHz it is still ok
[14:31] <fab4space> will you share the gateway sothat I can test it too?
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[14:35] <daveake> yeah it'll go up before the launch
[14:36] <craag> Is there any advantage to having another gateway receiving?
[14:36] <daveake> Only mine will be uplinking, otherwise chaos will ensue
[14:36] <daveake> yep
[14:36] <fab4space> ok nice , do you have an estimation of when you plan to do this awesome launch? :)
[14:36] <craag> I meant receiving
[14:36] <daveake> Yes
[14:36] <craag> ie does your retransmission check sddv.habhub
[14:36] <daveake> The "missing packet list" comes from Phil's SSDV server
[14:36] <daveake> ^ that
[14:37] <craag> k, cool :)
[14:37] <daveake> That's the bit I'm coding now :)
[14:37] <daveake> I did write all the code to do it locally, so that can be binned
[14:37] <craag> I have a few 868 loras on rpis at the office ;)
[14:37] <daveake> :)
[14:37] <daveake> and 868 habamp ?
[14:38] <craag> yes.... although don't think have the right cabling/adaptors :/
[14:38] <daveake> checking the wind predictions, you have time :)
[14:38] <craag> heh
[14:38] <daveake> (ground winds)
[14:38] <daveake> landing predictions aren't bad for the time of year
[14:39] <craag> k, will keep it in mind :)
[14:39] <craag> tooo many projects right now arggh
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[14:43] <fab4space> is the 868 habamp available for ordering?
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[14:52] <daveake> http://ava.upuaut.net/store/index.php?route=product/category&path=72_79
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[14:57] <Laurenceb_> UBSEDS13 is perplexing
[14:58] <Laurenceb_> I wonder if its on the wrong frequency for russian APRS and the low altitude position is a glitch
[14:58] <fab4space> ok thans daveake
[14:58] <fab4space> I'm gonna order one of these
[14:59] <fab4space> will it work directly with lora expansion board 868 mhz modules ?
[15:00] <daveake> Yeah just doin't tx into it
[15:00] <fab4space> ok :)
[15:00] <daveake> Dunno how much power you'd need to cause damage, but I'm not about to test to find out
[15:00] <fab4space> so currently you have a 9000bps datarate with SF7/250kHz/CR 4/6 , isn't it ?
[15:00] <fab4space> nice for ssdv :)
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[15:10] <fab4space> what is the bandwith of the SAW filter of the 868 habamp?
[15:11] <fab4space> is it ok for 869.85 center frequency used for ISM G4? (125kHz no duty cycle)?
[15:13] <craag> fab4space: datasheet :)
[15:13] <adamgreig> even just the product photos
[15:13] <adamgreig> -3dB looks like 862 to 877 MHz
[15:13] <fab4space> yes but it was to be sure
[15:14] <fab4space> ok thanks
[15:14] <adamgreig> though UpuWork you could put a link to the SAW part datasheet I guess :P
[15:14] <fab4space> :)
[15:14] <adamgreig> I believe it's probably http://onecall.farnell.com/epcos/b39871b3734h110/filter-saw-868-3mhz/dp/2360863
[15:14] <adamgreig> but not sure
[15:16] <Vaizki> that's very narrow one? only 300kHz wide..
[15:16] <adamgreig> yea maybe it's not that
[15:17] <fab4space> in fact I was asking this because I have read in the datasheet: This particular model is tuned for use with
[15:17] <fab4space> FLARM
[15:17] <fab4space> frequencies (
[15:17] <fab4space> 868
[15:17] <fab4space> Mhz) and I didn't know the FLARM freq range
[15:17] <fab4space> arg today I'm doing nasty copy / pastes , sorry guys :)
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[15:18] <craag> Just go with the spectrum in the product photos
[15:18] <craag> that's a bench test of the actual product
[15:18] <UpuWork> hello
[15:18] <UpuWork> SAW for the 868 amps ?
[15:18] Action: craag bows out
[15:18] <UpuWork> 1 sec
[15:19] <UpuWork> http://www.farnell.com/datasheets/1697177.pdf
[15:27] <UpuWork> that shut everyone up
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[15:59] <Geoff-G8DHE-Lap> Its amazing how much they can charge for two capaciors and two resistors in a package ;-)
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[16:42] Action: Laurenceb_ wonders if someone in Turkey is trolling
[16:42] <AndyEsser> Why?
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[16:58] <SpacenearUS> New vehicle on the map: 03CHIMP01 - 12http://tracker.habhub.org/#!qm=All&q=CHIMP01
[17:20] <Laurenceb_> AndyEsser: impossible altitude on UBSEDS13
[17:21] <SpacenearUS> New vehicle on the map: 03SCORPION - 12http://tracker.habhub.org/#!qm=All&q=SCORPION
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[17:46] <Lunar_Lander> evening
[17:47] <Lunar_Lander> february 9
[17:47] <Lunar_Lander> I am excited
[17:48] <daveake> woo
[17:48] Action: daveake updates his diary
[17:48] <Laurenceb_> what happens on 9th Feb ?
[17:49] <daveake> At a wild guess, LL's second HAB fligth
[17:49] <Laurenceb_> ah
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[17:51] <Lunar_Lander> yea
[17:51] <Lunar_Lander> https://myshare.uni-osnabrueck.de/f/93b4c70339/
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[17:52] <Oddstr13> eagle the second, eh? :P
[17:53] <Lunar_Lander> yea
[17:53] <Lunar_Lander> but Örnen-II was the name of the first balloon as well, long story
[17:54] <Oddstr13> hehe
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[17:55] <Oddstr13> where are you launching from?
[17:56] <Lunar_Lander> from Osnabrück
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[17:58] <Oddstr13> ok:)
[17:59] <Lunar_Lander> :)
[17:59] <Lunar_Lander> it's strange somehow to be close to flying again
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[18:16] <SpacenearUS> New position from 03N4XWC-1 after 036 days silence - 12http://tracker.habhub.org/#!qm=All&q=N4XWC-1
[18:16] <fsphil> https://www.youtube.com/watch?feature=player_detailpage&v=26QWMMT1c8Y#t=443
[18:16] <fsphil> spinny antenna looks like something from a 60s sci-fi film
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[18:26] <fsphil> important research, https://www.youtube.com/watch?v=TLbhrMCM4_0
[18:33] <mattbrejza> the real experiment is whether your pc can display it in 4K
[18:33] <fsphil> only got a 1080p monitor, so no :)
[18:34] <mattbrejza> still can test whether it can decode 4K then downscale it
[18:37] <fsphil> poorly
[18:37] <Oddstr13> pretty sure my internet is gona struggle with the 4k :P
[18:38] <mattbrejza> i7 + janet seems fine :P however i suspect its a different story at home
[18:39] <fsphil> my desktop machine is rather old. intel q6600. 2007 vintage :)
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[19:11] <mfa298> my work machine strugged to decode in 4k mode, although that's probably linux flash more than anything
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[19:25] <IUBAVM> Upu - still there?
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[20:00] <richardeoin> Laurenceb_: I'm my conclusion is the SE880 glitched out in a way I hadn't anticipated
[20:01] <richardeoin> leaving an arm core with probably like 1M lines written by sirf / csr running for two days..
[20:01] <richardeoin> not exactly the best idea in retrospect
[20:02] <richardeoin> a failure to return position frames would have caused a system watchdog reset, but
[20:03] <richardeoin> I hadn't imagined it returning seemingly valid frames, except with stupid data
[20:03] <Laurenceb_> ah ok
[20:03] <Laurenceb_> yeah that last position doesnt make sense, hidden from the receiver by a mountain
[20:03] <Laurenceb_> but Leo sometimes saw this
[20:03] <richardeoin> and 700m deep inside the mountain ;p
[20:04] <Laurenceb_> some aprs stations have crazy software running
[20:04] <Laurenceb_> it might have been explained by goofy ground station and the aprs frequency not being correct for russia?
[20:05] <richardeoin> I understood russia is 144.800 like the rest of europe/west asia
[20:05] <Laurenceb_> and you got positions from russia previously?
[20:05] <richardeoin> A goofy ground station maybe
[20:05] <richardeoin> UBSEDS9 went through siberia
[20:05] <richardeoin> worked a treat
[20:05] <Laurenceb_> yeah
[20:06] <richardeoin> the glitchy packets came through a mixture of turkish and russian recievers according to aprs.fi
[20:07] <Upu> Evening all
[20:07] <Upu> ping IUBAVM
[20:07] <richardeoin> makes a bad ground station less likely
[20:08] <Laurenceb_> well the time was wrong
[20:08] <Laurenceb_> oh
[20:08] <Laurenceb_> hmm
[20:08] <richardeoin> which time are you looking at?
[20:09] <Laurenceb_> 10:43
[20:10] <richardeoin> I think that's correct?
[20:11] <Laurenceb_> oh i see
[20:11] <Laurenceb_> http://aprs.fi/?c=raw&call=M0SBU-11
[20:12] <Laurenceb_> weird that there are no russian stations there
[20:12] <Laurenceb_> but maybe it geofenced itself
[20:12] <Laurenceb_> looks like gps positions were incorrect for half an hour
[20:13] <Laurenceb_> 2016-01-22 10:07:29 was the last obviously correct one?
[20:13] <Laurenceb_> but its weird that half an hour later it has a fix along the correct path but at the wrong altitude
[20:13] <Laurenceb_> sure it couldnt be a firmware bug?
[20:14] <Laurenceb_> it would have had to have stored a position for ~20minutes
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[20:17] <Laurenceb_> but yeah looks like something went buggy to me
[20:17] <Laurenceb_> either gps or firmware
[20:19] <richardeoin> yep, that's the last valid to me
[20:19] <richardeoin> will add something to cause a hardware reset is strange circumstances like those
[20:19] <richardeoin> although exactly how you define that is a minefield
[20:20] <richardeoin> some sort of filter on the gps values?
[20:20] <Laurenceb_> aprs already has a sanity filter aiui
[20:20] <Laurenceb_> positions have to be unique for the callsign, and less than a certain distance from the last position
[20:21] <Laurenceb_> so you could do something along those lines
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[20:24] <Laurenceb_> aiui the aprs filter can cause glitchy fixes to come through a while after a payload goes out of contact
[20:25] <Laurenceb_> but it doesnt look like that what happened to you, as there were loads of incorrect fixes at regular intervals
[20:25] <Laurenceb_> might just explain why the last fix was on the correct track
[20:26] <Laurenceb_> so maybe loss of signal was due to glitches, and the last position was a glitchy ground station
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[20:29] <SpacenearUS> New vehicle on the map: 03hr_v_chase - 12http://tracker.habhub.org/#!qm=All&q=hr_v_chase
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[20:41] <Laurenceb_> ok, so the aprs filter is based on velocity, so if a ground station was translating altitude between metric and imperial badly (Leo saw this), then a corrupt packet might arrive after some quite long delay
[20:41] <Laurenceb_> that would explain the 10:43 packet
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[20:53] <obo4> anybody around who wants to help me figure out the last bit of debugging to listen to a payload using SDRSharp?
[20:54] <obo4> https://ukhas.org.uk/guides:sdr_tracker?s%5b%5d=sdrsharp
[20:54] <Hilts> I'm struggling to get fsk 1200 working on the rfm22b. Kicksat has code but seems to have moved to the HX1.
[20:54] <Hilts> Anyone have any function arduino code that will do afsk 1200?
[20:54] <obo4> I've got virtual cable running and dl-fldigi is hearing the signal but still spitting out gibberish
[20:55] <PE0SAT> obo4: What are you trying to decode?
[20:56] <obo4> I have a HABDuino with an HX-1 on it, and I just want to bench test it
[20:57] <Hilts> what are you fushing to the xh1?
[20:57] <Hilts> pushing
[20:57] <Hilts> hx1
[20:57] <PE0SAT> So it is AFSK 1200?
[20:58] <Hilts> http://qtmm.sf.net/
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[20:59] <PE0SAT> http://uz7.ho.ua/modem_beta/soundmodem84.zip the best AFSK1200 decoder on Windows
[21:00] <obo4> https://github.com/HABduino/HABduino/tree/master/Software/habduino_v4
[21:00] <obo4> does that make me AFSK1200?
[21:00] <daveake> HABDuino with HX1 is APRS
[21:00] <PE0SAT> APRS is normaly AFSK1200
[21:00] <daveake> So you want something like Direwolf
[21:01] <daveake> which will do the decoding and will upload to aprs.fi
[21:01] <Hilts> thanks for the alternative PE0SAT :)
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[21:01] <PE0SAT> Start with just decoding and leave uploading for later
[21:01] <PE0SAT> Hilts: your welcome
[21:01] <obo4> I see
[21:02] <obo4> cool, thanks
[21:02] <PE0SAT> Maybe this is helpful http://www.pe0sat.vgnet.nl/decoding/block-diagram/
[21:03] <PE0SAT> And a *nix option http://www.pe0sat.vgnet.nl/decoding/unix-tlm-decoding/
[21:05] <obo4> thanks pe0sat!
[21:05] <PE0SAT> obo4: Good luck
[21:07] <Hilts> PE0SAT, I have aprs working on a teensy31, HX-1 and adafruit ultimate gps. I like pain so I'm trying to feed aprs to an rfm22b. ANybody have success?
[21:07] <Hilts> i'm also cheap
[21:08] <daveake> good luck with that one
[21:10] <PE0SAT> Hilts: I don't think so, modulation isn't supporting AFSK if I look at the specs
[21:11] <Hilts> I see lots of softmodems, ax25, and afsk1220 libraries and even aprslib
[21:11] <Hilts> yes,...but...
[21:11] <Hilts> everything i read about afsk vs fsk, i see nothing to prevent it from working.
[21:12] <PE0SAT> The module is new to me, so trying to find some data
[21:13] <Hilts> i can push both feld hell and rtty though both hx1 and rfm22b. Feld Hell through a ask/ook! Just asking. :P
[21:14] <PE0SAT> Feed it with a APRS/AX25 signal and see if you can RX and decode it
[21:16] <Hilts> I'm trying, but so far witout success. The Kicksat code runs through the teensy31 big D/A to feed the HX1 with a clean sine wave.
[21:17] <Hilts> No success in redirecting that to DIN of the rfm22b
[21:17] <PE0SAT> All examples are FSK based and not AFSK, even the CW and RTTY examples use FSK
[21:19] <Hilts> Right, and I can feed those into a speaker and can hear them, scoop them up with a mic and decode them in dl-fldi.
[21:19] <PE0SAT> Have a look at this: http://www.amsat.org/amsat/archive/amsat-bb/200007/msg00481.html
[21:19] <Hilts> i can do same with the output of the teensy31 with aprs.
[21:20] <PE0SAT> Bob launched multiple Satellites that carry APRS
[21:24] <Hilts> Good read. Thanks. I a new ham and am currentlty limited to the higher bands so have been playing there. The consenses is that using an
[21:25] <Hilts> audio coupler to feed a 70cm radio rtty is a terrible waste of band width, but it does work.
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[21:27] <Hilts> oh well, I'll keep investigating but may have to dig up a converter circuit afsk to fsk, if possible.
[21:27] <PE0SAT> Sound like you'll have a lot of fun :D
[21:29] <Hilts> as I said I'm a glutton for punishment.
[21:30] <Hilts> I made a rocket beacon transmitter from a WRL-10534 at85 and 3.3v watch battery that fits in a 13mm model rocket xmitting feld hell
[21:31] <Hilts> but I came here becasue I need to go higher, ready for level one cert.
[21:31] <PE0SAT> the journey is more enjoyable than the final destination
[21:32] <Hilts> a dirty dry martinin is a reward at the end of each destination reached.
[21:33] <Hilts> Bore you one more moment? My work day just ended.
[21:34] <PE0SAT> If can help I wil
[21:35] <Hilts> I've been on here at the other end of the day a few time, your time zones prime time, but never had the nerve to bring up rocket tracking on the map.
[21:37] <Hilts> We've lost a few with G engines. I've had my listening station up and will make it more permanent as there are fewer here in the USA.
[21:37] <PE0SAT> I normally follow satellites and a balloon now and then. No idea if there some rocket trackers on this page
[21:38] <PE0SAT> But it sounds interresting
[21:39] <Hilts> Short trips, but can be a bear to chase. My wish for aprs using aprs.fi with a cheaper transmitter. RTTY works great with hadhub tracker.
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[21:40] <Hilts> Just have a wish to see where they land sometimes, on google maps.
[21:40] <Hilts> Quest the question is, would the owners of habhub tracker mind if a few payloads were from short lived rocket launches?
[21:41] <Hilts> I'm also planning on some light weith pico balloon launches too!
[21:44] <Hilts> Payloads still cost some coin. Iexpect to lose a balloon, but the rockets are starting to get expensive. Trackers are "insurance" incase a parachute deploys at apogee.
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[21:45] <Hilts> Thanks for the chat. I'll pose the question when the channel is busier. Later.
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[21:45] <eroomde> fond this while booking a concert http://www.southbankcentre.co.uk/whatson/wow-near-space-programme-1001371?dt=2016-03-11
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[22:31] <SpacenearUS> New vehicle on the map: 03CRAAG4 - 12http://tracker.habhub.org/#!qm=All&q=CRAAG4
[22:32] <craag> eh wat
[22:32] <Upu> lol
[22:32] <craag> that's 300m north-east
[22:33] <Vaizki> your lab has become sentient
[22:33] <craag> payload is expected
[22:33] <craag> but not precisely *there*
[22:33] <craag> out by 300m. horizontally.
[22:33] <Vaizki> 0.77V battery? really?
[22:34] <craag> 77% voltage I think
[22:34] <craag> haven't calibrated it
[22:34] <Vaizki> ah
[22:34] <craag> but was 100 when started
[22:34] <craag> ah there we go
[22:35] <craag> now it's spot on
[22:41] <Vaizki> you and your weird back yards.. they're quite adorable little lots though :)
[22:42] <Vaizki> would make quite a bit of sense here too but there's only one small street of houses built in the english style of having houses cheek to cheek with long narrow lots at the back
[22:43] <Vaizki> I almost bought a house from there, put in an offer for a house being foreclosed but the owner bailed himself out at the last minute
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[00:00] --- Sat Jan 23 2016