highaltitude.log.20180223

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[00:46] <SpacenearUS> New vehicle on the map: 03M4534064 - 12https://tracker.habhub.org/#!qm=All&q=M4534064
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[05:27] <SpacenearUS> New position from 03HIRFW-6 after 0317 hours silence - 12https://tracker.habhub.org/#!qm=All&q=HIRFW-6
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[06:00] <SpacenearUS> New position from 03icarusIV after 039 hours silence - 12https://tracker.habhub.org/#!qm=All&q=icarusIV
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[06:15] <SpacenearUS> New vehicle on the map: 03N4840276 - 12https://tracker.habhub.org/#!qm=All&q=N4840276
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[07:13] <SpacenearUS> New vehicle on the map: 03N4741084 - 12https://tracker.habhub.org/#!qm=All&q=N4741084
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[08:16] <SpacenearUS> New vehicle on the map: 03MY CAR_chase - 12https://tracker.habhub.org/#!qm=All&q=MY%20CAR_chase
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[08:23] <SpacenearUS> New position from 03PILOTS-GR after 032 days silence - 12https://tracker.habhub.org/#!qm=All&q=PILOTS-GR
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[08:34] Nick change: en4rab_ -> en4rab
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[09:37] <SpacenearUS> New vehicle on the map: 03THORUS - 12https://tracker.habhub.org/#!qm=All&q=THORUS
[09:38] <Darkside> yesss
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[09:41] <fsphil> nice
[09:42] <Darkside> just testing some changes to FldigiBridge
[09:42] <Darkside> moving the habitat upload stuff into the GUI thread
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[09:55] <Darkside> fsphil: craag https://github.com/projecthorus/horus_utils/wiki#fldigibridge-processing-of-data-from-dl-fldigi
[09:55] <fsphil> handy
[09:56] <fsphil> esp since it's such a pain building dl-fldigi these days
[09:56] <fsphil> shame it can't do ssdv
[09:57] <Darkside> yeah
[09:57] <Darkside> i accept pull requests :-)
[09:57] <fsphil> well it's more a limitation of vanilla fldigi
[09:58] <fsphil> it won't pass 0x00 bytes
[09:58] <Darkside> ahh ok
[09:59] <fsphil> I'm looking at marble as a possible way to embed a map along with ssdv images, telemetry and maybe an rf waterfall into a single gui
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[10:19] <SpacenearUS> New position from 03BoSSII after 0320 hours silence - 12https://tracker.habhub.org/#!qm=All&q=BoSSII
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[10:26] <Geoff-G8DHE> !dial BoSSII
[10:26] <SpacenearUS> 03Geoff-G8DHE: Latest dials for 03BoSS II 10(ba0d): 03434.5 MHz
[10:29] <SpacenearUS> New vehicle on the map: 03N4810417 - 12https://tracker.habhub.org/#!qm=All&q=N4810417
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[10:30] <jonny_eal> BoSSII is set to launch now!!!
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[10:42] <jonny_eal> BoSSII is in the air!
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[10:43] <PE1ANS> !dial BoSSII
[10:43] <SpacenearUS> 03PE1ANS: Latest dials for 03BoSS II 10(ba0d): 03434.5 MHz
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[10:59] <daveake> Anyone see the signal from BoSSII? It's probably a bit low for me but nothing so far
[11:00] <daveake> Ah I see it updated a minute ago
[11:00] <Geoff-G8DHE> Nothing here yet ....
[11:00] <G8KNN> It's very weak here
[11:00] <daveake> We do have a hill in the way here :/
[11:00] <G8KNN> signal sometimes jumps up in level suggesting antenna or tx problem
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[11:04] <g8fjg> daveake its on 434.5 650/300 but v weak
[11:04] <Geoff-G8DHE> Should be over my horizon by now ...
[11:05] <daveake> Ta
[11:06] <daveake> Only seeing a single very weak peak on 434.5, so that must be something else
[11:06] <daveake> Dodgy aerials seems to be a common issue
[11:07] <vk4tec> got a balloon up dave ?
[11:07] <daveake> Nope
[11:07] <daveake> Not even a pretend one
[11:08] <daveake> Nobody will believe me when I do fly one of the RTLS payloads :)
[11:08] <vk4tec> RTLS ?
[11:08] <vk4tec> return to launch site ?
[11:08] <daveake> Some stuff I'm testing
[11:08] <vk4tec> rocket boosters
[11:08] <daveake> Now this might help with these dodgy payload aerials ... https://pbs.twimg.com/media/DWtpOtDWkAAcE8D.jpg
[11:09] <vk4tec> is that your back yard dave
[11:09] <daveake> I wish :)
[11:09] <vk4tec> portable setup
[11:09] <vk4tec> looks like space tracking array
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[11:11] <vk4tec> we have very heavy rains here in australia. WX balloons going into the hills or the ocean most frusrating - one landed on airport
[11:12] <daveake> BoSSII descending already
[11:12] Action: daveake closes down dl-fldigi
[11:12] <Geoff-G8DHE> likewise
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[11:17] <SpacenearUS> New vehicle on the map: 03M4453038 - 12https://tracker.habhub.org/#!qm=All&q=M4453038
[11:24] <SpacenearUS> New vehicle on the map: 03M4533491 - 12https://tracker.habhub.org/#!qm=All&q=M4533491
[11:25] Nick change: Guest91737 -> danielsaul
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[12:12] <SpacenearUS> New position from 03HB9HFJ-11 after 034 days silence - 12https://tracker.habhub.org/#!qm=All&q=HB9HFJ-11
[12:28] <SpacenearUS> New vehicle on the map: 03SITSRTTY - 12https://tracker.habhub.org/#!qm=All&q=SITSRTTY
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[12:37] <SpacenearUS> New position from 03RSIST after 0310 hours silence - 12https://tracker.habhub.org/#!qm=All&q=RSIST
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[12:40] <FuzzyLemon_> Hi all! Our cut down device triggered prematurely so our flight was quite literally cut short
[12:40] <Darkside> eek
[12:40] <FuzzyLemon_> Thanks to those who helped track. We will be trying again soon! :)
[12:40] <Darkside> how was it triggered?
[12:41] <FuzzyLemon_> At a specified pressure
[12:42] <Darkside> pressure, not altitude
[12:42] <Darkside> and your pressure sensor was rated up your cutdown pressure?
[12:43] <FuzzyLemon_> Yes its doongara cut downThe atmospheric pressure
[12:43] <FuzzyLemon_> Model we used was not very high resolution
[12:44] <FuzzyLemon_> The cut down device worked perfectly
[12:44] <Darkside> cutdown based on gps altitude is probably a better idea
[12:44] <Darkside> or via remote radio control
[12:44] <FuzzyLemon_> It was just set at the wrong pressure
[12:44] <SpacenearUS> New vehicle on the map: 03VE2WMG-11 - 12https://tracker.habhub.org/#!qm=All&q=VE2WMG-11
[12:45] <FuzzyLemon_> The doongara doesnt have a Gps module
[12:46] <FuzzyLemon_> So only options for triggering the cutdown are time or pressure
[12:46] <Darkside> wow $250
[12:46] <daveake> https://swsdt.com/products/doongara_balloon_cut-down/
[12:46] <FuzzyLemon_> We got it as a prize from the gsbc challenge
[12:46] <FuzzyLemon_> So it was free
[12:47] <FuzzyLemon_> It was just set to burst at the wrong pressure
[12:47] <Darkside> would love to know waht pressure sensor is on it
[12:47] <FuzzyLemon_> I think you can connect it to an external trigger like a Gps module
[12:47] <Darkside> and what pressure it's accurate down to
[12:48] <FuzzyLemon_> 10mb
[12:48] <Darkside> thats... hrm whats that
[12:49] <FuzzyLemon_> In what unit?
[12:49] <Darkside> im looking through the GFS model data to see what altitude 10mb is
[12:50] <Darkside> at the current time
[12:50] <FuzzyLemon_> I think its about 30km
[12:51] <Darkside> 31 km above me at the moment
[12:52] <Darkside> so if you want to use the cutdown you're capped at 31 km altitude?
[12:52] <Darkside> thats a bit sad
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[13:05] <SpacenearUS> New vehicle on the map: 03VA2RMG-11 - 12https://tracker.habhub.org/#!qm=All&q=VA2RMG-11
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[13:48] <pb0ahx> !flights
[13:48] <SpacenearUS> 03pb0ahx: Current flights: 03BoSS II 10(ba0d)
[13:50] <pb0ahx> frequentie for SITSRTTY ???
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[13:55] <daveake> who knows
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[13:55] <SpacenearUS> New vehicle on the map: 03BALTS2 - 12https://tracker.habhub.org/#!qm=All&q=BALTS2
[13:55] <daveake> I assumed it was a test as there's been no announcement
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[14:12] <G8KNN> SITSRTTY is on 434.150
[14:33] <pb0ahx> tnx info
[14:34] Nick change: fl__0 -> fl_0
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[14:59] <PE2BZ> !flights
[14:59] <SpacenearUS> 03PE2BZ: Current flights: 03BoSS II 10(ba0d)
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[15:49] <SpacenearUS> New position from 03U3S22 after 0317 hours silence - 12https://tracker.habhub.org/#!qm=All&q=U3S22
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[15:51] <_Jordan> Good prediction today
[15:51] <_Jordan> basically landing in same place
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[17:18] <SpacenearUS> New vehicle on the map: 03N1133944 - 12https://tracker.habhub.org/#!qm=All&q=N1133944
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[20:09] <userscott> Hi guys! Long time no post. I have a Genie G20 and regulator, 100% full of helium.. any use to anybody on here local to Manchester? :)
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[21:11] <chris_99> Hi, i'm just looking @ https://ukhas.org.uk/guides:tracking_guide, would https://www.ebay.co.uk/itm/Telescopic-Antenna-SMA-75-MHz-to-1-GHz-ANT500/142502937859 be suitable possibly for receiving balloons? or is there something similarly omni-directional that may work a bit better? (I just ordered an SDR that i'd like to play with recieving balloons with, i've only picked up one, once before with a scanner and a
[21:11] <chris_99> very old antenna i bought, which probably isn't a very good antenna)
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[21:50] <Mike-SA6BSS|3> I´d say this is a the smallest antena to use if you are going to hear anything http://www.ebay.co.uk/itm/X30-N-2M-70CM-DUAL-BAND-COLLINEAR-ANTENNA-PMR-446-X-30-ICOM-YAESU-144-430MHz/362008464490?epid=936835874&hash=item544962cc6a:g:dDgAAOxyn9BRaZR-
[21:51] <chris_99> ah Cheers!
[22:02] <chris_99> would other omni-directional options that work well, be collinear type antennas?
[22:04] <Mike-SA6BSS|3> most 70/144 antenna combos usulay are collinear, they work well and have a small gain towards the horizon - hearing better in low angles , can have nulls when a payload is near or right over your head
[22:07] <chris_99> ah that's interesting wrt nulls when it's overhead. would the only way to avoid that, to use a directional antenna instead?
[22:08] <fsphil> it's usually a rare and very temporary situation
[22:09] <chris_99> ah
[22:10] <fsphil> the antenna on the payload probably has a null directly under it too
[22:25] <Darkside> we use turnstile antennas on the chae car to help mitigate the effects of it being overhead
[22:26] <Darkside> there is always goign to be some loss of signa, as the payload antenna will have a null brlow (as fsphil says), but at least the RX antenna doesn't have one too!
[22:26] <chris_99> ah neat that's another type of antenna i'd not heard of before
[22:26] <Darkside> but the turnstile is *only* useful with the payload at high elevations
[22:26] <chris_99> ahh
[22:26] <Darkside> below maybe 40 degrees elevation you're better off using a 1/4 wave
[22:26] <chris_99> do you use a yagi too?
[22:26] <Darkside> and at even lower elevations osmehtin gwith a bit of gain is better
[22:26] <Darkside> not mobile :-)
[22:27] <Darkside> and i'm generally not at home during balloon launches!
[22:27] <chris_99> ah heh
[22:27] <Darkside> http://rfhead.net/?p=647
[22:27] <chris_99> oh neat
[22:28] <chris_99> that's very compact
[22:30] <Darkside> the downside fo that particular design (and there are variants), is the poor performnce at low elevations
[22:30] <Darkside> hence having to make the antennas switchable
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[22:34] <chris_99> i notice you're using an rtlsdr i think, do you use that with Fldigi with that, or do you use a program specifically for SDRs with that?
[22:35] <Ian_> There is no single antenna that matches your requirements, so you covered all bases with a selection. Good on you. I'm impressed at the neat look of the turnstile.
[22:37] <Darkside> chris_99: i'm actually using an airspy for RTTY reception
[22:37] <Darkside> the rtlsdr is for other things
[22:38] <chris_99> ah gotcha, i have heard of the airspy i think as a dongle, you mean you use its own software?
[22:38] <Darkside> well, i use SDR Console and feed the audio from that into fldigi
[22:38] <chris_99> ahh gotcha
[22:38] <fsphil> (dl-)fldigi still can't use an sdr directly
[22:39] <fsphil> would be nice
[22:39] <Ian_> +1
[22:39] <Darkside> huge amount of work to do that well tnough
[22:40] <Darkside> though*
[22:40] <Darkside> easier to take audio from another sdr program
[22:40] <chris_99> hmm, would passing audio from the SDR give fldigi enough bandwidth, to be able to retune thoughout the balloon's flight, without having to re-tune via the SDR software?
[22:41] <Darkside> fldigi internally has limitations on sample rate
[22:41] <Darkside> it woudl require a *huge* amount of work
[22:41] <fsphil> weird and variable limitations
[22:41] <Darkside> and it would also make it likely that it could get locked up on some other signal
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[23:17] <SpacenearUS> New vehicle on the map: 03M4543030 - 12https://tracker.habhub.org/#!qm=All&q=M4543030
[23:17] <SpacenearUS> New vehicle on the map: 03N1113557 - 12https://tracker.habhub.org/#!qm=All&q=N1113557
[23:18] <SpacenearUS> New vehicle on the map: 03M4456124 - 12https://tracker.habhub.org/#!qm=All&q=M4456124
[23:18] <SpacenearUS> New vehicle on the map: 03N1850225 - 12https://tracker.habhub.org/#!qm=All&q=N1850225
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[23:29] <SpacenearUS> New vehicle on the map: 03N2050189 - 12https://tracker.habhub.org/#!qm=All&q=N2050189
[23:32] <hypercore> SpacenearUS: are you a bot?
[23:35] <hypercore> anyone here?
[23:36] <fsphil> just us humans
[23:36] <fsphil> totally not a bot in disguise
[23:37] <hypercore> oh cool, just wondering how much it costs to launch a weather balloon with e.g. a gps and/or camera module
[23:37] <darsie> Do you want radio, too?
[23:38] <hypercore> darsie: oh yeah that too
[23:39] <darsie> So you don't have to track your balloon visually through the clouds to find out where it goes down ;).
[23:39] <darsie> Do you use chutes once the balloon pops?
[23:39] <hypercore> darsie: that could be a hassle :P
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[23:40] <hypercore> darsie: not sure honestly, i guess it depends on the distance i expect it to travel
[23:40] <hypercore> if far, i guess it would be disposable and would not require chutes
[23:40] <fsphil> you always want a chute
[23:40] <fsphil> imagine it landing on your head
[23:40] <hypercore> oh really?
[23:40] <hypercore> yeah ok good point
[23:41] <darsie> If it lands on someone elses head far away you won't be liable ;).
[23:41] <hypercore> although it's not like they pop most of the time, i thought they would rise to x altitude, and then sink back to earth
[23:41] <fsphil> no, they'll almost always pop
[23:41] <hypercore> oh ok
[23:42] <darsie> They are filled to pop at a certain altitude.
[23:42] <hypercore> yeah then with a chute as well
[23:42] <darsie> I guess you could fill them less.
[23:42] <hypercore> although how is the chute deployed?
[23:42] <darsie> GPS senses fall?
[23:42] <SpacenearUS> New vehicle on the map: 03N1630378 - 12https://tracker.habhub.org/#!qm=All&q=N1630378
[23:42] <fsphil> it's best to pre-deply the chute
[23:42] <fsphil> no fancy mechanisms to fail
[23:43] <darsie> Yeah, deployed chute won't drag much on rise.
[23:44] <hypercore> so you would attach the top of the chute to the bottom of the balloon?
[23:44] <fsphil> the weather sondes often put the chute into the balloon
[23:44] <fsphil> but there's always the risk of the balloon remains interfering with it
[23:44] <fsphil> they don't always burst cleanly
[23:44] <fsphil> I'd usually attach the chute 2/3 of the way up the cord
[23:45] <fsphil> the remains of the balloons should hang safely between the chute and the payload after burst
[23:45] <hypercore> and what do you guys normally use as the payload?
[23:45] <fsphil> there is no normal :
[23:45] <fsphil> :)
[23:45] <daveake> lol
[23:46] <daveake> bear
[23:46] <daveake> always a bear
[23:46] <fsphil> yes
[23:46] <daveake> In Oz they don't bother with parachutes, hence drop bears
[23:46] <fsphil> *face palm*
[23:47] <daveake> :)
[23:47] <hypercore> what's a good first launch project?
[23:47] <daveake> Anyhoo, payload is a GPS/radio tracker, at a minimum. Usually a camera of some sort.
[23:47] <hypercore> ok, that's simple enough
[23:47] <hypercore> oh and the cost?
[23:47] <darsie> H2? He?
[23:48] <daveake> He is cheaper for 1-2 launches
[23:49] <daveake> Roughly, £500 for balloon, gas, parachute, tracker, receiving equipment
[23:49] <daveake> Can be done for less but that's a useful rough figure
[23:50] <darsie> How much is a balloon alone?
[23:50] <daveake> Most rewarding if you build the tracker yourself
[23:50] <daveake> £35 - £100, ish
[23:50] <fsphil> and very educational
[23:50] <hypercore> what's the most price breakdown?
[23:51] <daveake> If you can keep the weight down then you can use a smaller balloon for the same height, so less gas, and a smaller/cheaper parachute
[23:51] <hypercore> 100 for balloon, 400 for what else?
[23:51] <darsie> How about thin plastic foil, PE, mylar etc and some tape for a balloon?
[23:51] <hypercore> and also, how do you avoid collisions with aircraft?
[23:51] <hypercore> do you have to register your flight or something?
[23:52] <fsphil> depends on the country of launch
[23:52] <daveake> Balloon £60, gas £60, tracker £100, radio receiver and aerials £50, petrol £50, parachute £30, duct tape £200
[23:52] <fsphil> and the overall size of the balloon/payload train
[23:52] <fsphil> you're using that fancy pink duct tape then?
[23:52] <daveake> lol
[23:53] <fsphil> https://tracker.habhub.org/#!qm=All&q=N1850225
[23:53] <darsie> How high do solar balloons go?
[23:53] <fsphil> might head out for this sonde tomorrow
[23:57] Laurenceb_ (~laurence@host86-149-71-226.range86-149.btcentralplus.com) joined #highaltitude.
[00:00] --- Sat Feb 24 2018