highaltitude.log.20160719

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[04:23] <SpacenearUS> New position from 03S11 after 0310 hours silence - 12https://tracker.habhub.org/#!qm=All&q=S11
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[04:56] <SpacenearUS> New vehicle on the map: 03KingsHAB - 12https://tracker.habhub.org/#!qm=All&q=KingsHAB
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[05:16] <Upu> -------/\ 434.250 no flight doc but in the air
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[05:38] <daveake> wotwot
[05:39] <daveake> oh well it'll be down before I launch (alsoon 434.250)
[05:39] <daveake> better get on the road
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[05:55] <Upu> yeah I approved flight but a little early for most people
[05:55] <Upu> good job they uploaded from launch site
[05:56] <edmoore> quiet landing spot
[06:02] <edmoore> lovely photo daveake
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[06:32] <Upu> my house may be on some of these SSDV pics
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[06:46] <Upu> don't point your camera down ever
[06:47] <Upu> as I spend ages trying to work out where the image is
[07:00] <SpacenearUS> New vehicle on the map: 03CALLSIGN123_chase - 12https://tracker.habhub.org/#!qm=All&q=CALLSIGN123_chase
[07:04] <fsphil> who's flight is this?
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[07:13] <Upu> going to guess ing's Leadership Academy in Warrington, Cheshire
[07:13] <Upu> +k
[07:14] <Upu> does look like that air field has been used since 1946
[07:16] <fsphil> on the way back
[07:16] <AndyEsser> HAB in Warrington?! why did I not know of such things
[07:18] <fsphil> contrast stretched: http://i.imgur.com/XJnryBQ.jpg
[07:18] <AndyEsser> note to self... it's habhub not habhurb...
[07:19] Nick change: daey -> flutterbat
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[07:25] <fsphil> habherb. the high altitude food group
[07:27] <gonzo__> babhub. upu's current chan
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[07:38] <AndyEsser> gah... if I hear the phrase "It's no idiomatic Go" once more... I'm likely to blow a blood vessel in the brain
[07:38] <AndyEsser> not*
[07:41] <fsphil> give up and play pokemon go
[07:41] <AndyEsser> oI wish
[07:41] <AndyEsser> I*
[07:41] <AndyEsser> gah
[07:41] <AndyEsser> can't type today
[07:50] <nick_> I had fun trying porting a library for communicating with FPGAs to Go.
[07:50] <nick_> It took a lot of thinking to decide upon an API.
[07:50] <nick_> Because the C++ library just does horrible things.
[07:54] <AndyEsser> Go just does horrible things
[07:54] <AndyEsser> :)
[07:54] <AndyEsser> Really not a fan of the language
[07:54] <AndyEsser> or this sodding "Idiomatic Go" that we keep trotting out here
[07:54] <AndyEsser> type inference and similar is nasty
[07:55] <nick_> Well, people abusing interface{} is nasty, it should almost never be used.
[07:56] <AndyEsser> yes, agreed
[07:56] <nick_> But other than that I quite like the language.
[07:56] <AndyEsser> I also dislike this:
[07:56] <AndyEsser> result := someFunction(params)
[07:56] <AndyEsser> wtf is result...
[07:56] <AndyEsser> I have to now go into someFunction and find out what it's returning
[07:56] <AndyEsser> rather than
[07:56] <AndyEsser> var result int
[07:57] <AndyEsser> result = someFunction(params)
[07:57] <AndyEsser> I can instantly see what type it is
[07:57] <AndyEsser> if someone changes the return type from a function, it'll throw a compile time error
[07:59] <nick_> I've not come across this as a problem.
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[07:59] <nick_> But why not do "var result int = someFunction(params)"?
[07:59] <AndyEsser> that works?
[07:59] <AndyEsser> eww
[07:59] <AndyEsser> ha
[08:00] <AndyEsser> what happens in a multiple-response function?
[08:00] <AndyEsser> var result1 int, result2 error = someFunction(params)?
[08:00] <AndyEsser> is that the syntax?
[08:01] <nick_> Then I think you have to fall back to defining it earlier.
[08:01] <nick_> But I don't do that, I just do thinks like "val, err := someFn(pars)"
[08:02] <nick_> Although I try to name my variables to make sense.
[08:03] <nick_> And when I'm developing I just have godoc serving up documentation, so I check that if I'm unsure of a return type.
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[08:03] <AndyEsser> fair enough
[08:03] <AndyEsser> I'm also not a fan of this syntax
[08:03] <AndyEsser> if result, err = someFunction(params); err != nil {...error handling...}
[08:03] <nick_> Why not?
[08:04] <AndyEsser> because in that instance, result is only in scope within the if/else block
[08:04] <AndyEsser> err sorry
[08:04] <AndyEsser> if result, err := someFunction....*
[08:04] <AndyEsser> which keeps catching me out
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[08:05] <nick_> I think it's quite clear.
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[08:05] <nick_> You decide which way you want to write it depending on what you want in scope.
[08:05] <AndyEsser> I think I'm just used to, and like, being explicit :)
[08:06] <nick_> Although generally I only do if err := fn(); err != nil {} for single value returning functions.
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[08:07] <AndyEsser> I think doing it literally just for err is _ok_ as long as aware of it
[08:07] <nick_> Otherwise I default to calling the function then checking the error.
[08:07] <nick_> And I'm not even being paid by the line.
[08:07] <AndyEsser> yea, that's typically what I do
[08:07] <AndyEsser> var result SomeType
[08:07] <AndyEsser> result, err := someFunction(params)
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[08:07] <AndyEsser> if err != nil {...}
[08:08] <nick_> I'd do that without the first line.
[08:08] <gonzo__> what lanhuage is := ??
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[08:09] <SM0ULC-Reb> morrn
[08:10] <AndyEsser> gonzo__: golang
[08:10] <nick_> In Go ":=" declares a new variable with an inferred type.
[08:10] <AndyEsser> nick_: yea, that's what I keep getting called up on in PR
[08:10] <swaledale> mornin'
[08:10] <AndyEsser> having a discussion now between myself, another BE who feel explicit is good, and the "Pro Go" guy
[08:10] <nick_> Or perhaps more precisely declares at least one new variable and may assign to multiple variables, some of which may not be new.
[08:11] <AndyEsser> our issue is that usually that inferred type is then being returned via JSON to a frontend
[08:11] <AndyEsser> if someone changes the response, it will compile fine, but the UI will suddenly get a whole new object and break
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[08:11] <nick_> Ah, yeah.
[08:12] <nick_> When you start parsing things like JSON then some people tend towards doing terrible things.
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[08:13] <nick_> I think you can just add this to your unit testing though.
[08:13] <nick_> Parse the JSON into structs and ensure that all variables get set.
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[08:19] <swaledale> AndyEsser: did you see there was a launch from Warrington this am?
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[08:25] <Matt_PrjHeT> Yikes. Is KingsHAB hoping for a recovery?
[08:26] <fsphil> lz1dev: the welcome panel keeps appearing on the tracker every time it's loaded
[08:27] <fsphil> -2.5m/s, oops
[08:28] <fsphil> at that altitude too
[08:28] <AndyEsser> swaledale: only this morning when I logged into IRC
[08:28] <AndyEsser> :P(
[08:28] <AndyEsser> :( *
[08:28] <AndyEsser> would've been perfect for tracking
[08:28] <swaledale> yeah it was a tad early!
[08:28] <AndyEsser> if my USB works
[08:28] <fsphil> the balloon might not have burst, maybe leaking
[08:28] <swaledale> bit early for setting up the antenna
[08:28] <AndyEsser> after the slight... bendy bendy issue last night :P
[08:28] <swaledale> bendy bendy - ah what was that!!
[08:29] <AndyEsser> swaledale: I leave mine permanently up now, could've dialed in via VNC, but I unplugged it last night :(
[08:29] <AndyEsser> swaledale: RG213 straight into a USB dongle plugged straight into a PC puts a lot of strain on the USB connector
[08:29] <AndyEsser> whoops
[08:29] <fsphil> bendy issue?
[08:29] <fsphil> oh
[08:29] <fsphil> forgot about that :)
[08:29] <swaledale> oh dear
[08:29] <AndyEsser> It might still work
[08:29] <AndyEsser> but I wasn't going to faff
[08:29] <AndyEsser> ha
[08:30] <SM0ULC-Reb> very slow descend of kingshab, big chute?
[08:30] <AndyEsser> annoyed though, would've liked to have tracked this flight
[08:30] <fsphil> they're very cheap anyway
[08:30] <AndyEsser> fsphil: yea
[08:30] <AndyEsser> not so much annoyed about breaking it
[08:30] <AndyEsser> just that I can't track :P
[08:30] <fsphil> -3m/s now
[08:30] <fsphil> it's not going to be enough
[08:30] <SM0ULC-Reb> fsphil: big chute on it?
[08:31] <AndyEsser> the dV/dH rates on the tracker page, is that calculated locally in the webpage? or actually based on historic data?
[08:31] <fsphil> SM0ULC-Reb: no idea
[08:31] <fsphil> the smooth peak on the altitude graph suggests the balloon hasn't burst
[08:31] <AndyEsser> Did they do a launch announcement?
[08:32] <fsphil> the live prediction I think is assuming the balloon will ascend again
[08:33] <swaledale> quick get the rifle out
[08:33] <SM0ULC-Reb> 8500 / 3 * 17 = 48ish km :/
[08:34] <fsphil> "Sunk Island"
[08:34] <gonzo__> very slow descent and as noted, no sudden drop
[08:34] <gonzo__> 2 balloons??
[08:34] <fsphil> heh, it's going very close to "Burstwick"
[08:35] <swaledale> predictor doesnt think its burst
[08:35] <fsphil> yeah it won't be as far out to sea as that prediction suggests
[08:36] <swaledale> keeps flipping between chute and balloon!
[08:36] <fsphil> -3m/s is the threshold
[08:37] <fsphil> gonzo__: two balloons or a leak
[08:37] <gonzo__> ah, I didn;t think of that
[08:37] <fsphil> hopefully they didn't use two balloons. that'd be a bit crazy
[08:38] <SM0ULC-Reb> it's going to be wet, that's for sure.. :/
[08:38] <gonzo__> yep, but you never know what people do
[08:38] <swaledale> even the biggest of chutes surely wouldnt get that slow a descent?
[08:39] <Matt_PrjHeT> Any idea who KingsHAB are? A school maybe?
[08:39] <Matt_PrjHeT> I can't find any website info
[08:39] <fsphil> at 24km you'd get a faster descent even with a huge chute
[08:46] <AndyEsser> Matt_PrjHeT: there was one previous email on the mailing list from them
[08:46] <AndyEsser> seems to be a school
[08:46] <AndyEsser> King's Leadership Academy in Warrington
[08:46] <AndyEsser> kingswarrington.com
[08:48] <gonzo__> upu's callsign seems to be ol, the rx list at launch, so suspect he is assisting
[08:48] <gonzo__> on
[08:48] <gonzo__> so they can't be doing anything too daft
[08:49] <Matt_PrjHeT> Thanks andyesser
[08:49] <AndyEsser> np
[08:51] <AndyEsser> I should see about getting involved with them sometime
[08:51] <AndyEsser> not far away
[08:51] <swaledale> not far off coast now
[08:52] <fsphil> images getting more detailed
[08:52] <Upu> Not assisting just noticed it
[08:52] <Matt_PrjHeT> Last day of school today...
[08:54] <Upu> Uh oh water time
[08:54] <edmoore> salute it
[08:55] <dbrooke> image 30 shouldn't be too difficult for Upu to locate
[08:56] <Upu> Sat at a customer's waiting to go into a meeting
[08:56] <dbrooke> Ah, different kind of difficulty then.
[08:57] <Upu> Parachute too big ?
[08:59] <SA6BSS-Mike|2> no one knows, thay are not on the channel
[09:00] <gonzo__> even with a big chute, would we expect it to have significant drag at the 'burst' alt to give such a smooth curve?
[09:00] <swaledale> there's no swing showing in any of the images, camera directly down all the time, so i would think no burst
[09:02] <arjunnaha> How recommended is it to have a fixed receiving station when chasing?
[09:03] <fsphil> it's recommended
[09:04] <fsphil> gives you at least one station nearby with reliable internet
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[09:07] <gonzo__> if you are in the UK, hiving a launch announcement and being on this chan will get you lots of receive stations
[09:08] <AndyEsser> shouldn't be relied on though :)
[09:08] <gonzo__> (you still should have your own rx. especially at the launch site)
[09:08] <gonzo__> snap
[09:08] <AndyEsser> be amusing to see if anyone launches a HAB over the conference weekend (who isn't at the conference)
[09:10] <SA6BSS-Mike|2> im on websdr in Cleethorpes, North East Lincolnshire if anyone wonders
[09:10] <Matt_PrjHeT> When's the conference? I've been out the loop recently due to work stuff..
[09:12] <Geoff-G8DHE> 10th Septemeber https://ukhas.org.uk/general:ukhasconference2016
[09:13] <Matt_PrjHeT> Thanks Geoff-G8DHE
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[09:20] <AndyEsser> should be a good weekend :)
[09:20] <Geoff-G8DHE> Oops Kingshab doesn't look good :-(
[09:21] <Geoff-G8DHE> Can't see a NOTAM either, maybe expired
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[09:28] <edmoore> Upu: looking at the telem graph looks like no parachute at all
[09:28] <edmoore> descent rate constant
[09:28] <swaledale> I think its a leak
[09:46] <edmoore> plausible
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[09:51] <SpacenearUS> New position from 03X0 after 036 days silence - 12https://tracker.habhub.org/#!qm=All&q=X0
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[10:11] <daveake> gm from Elsworth
[10:11] <Geoff-G8DHE> good morning
[10:11] <Geoff-G8DHE> Is it three payloads on one balloon today ?
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[10:16] <pb0ahx> !flights
[10:16] <SpacenearUS> 03pb0ahx: Current flights: 03KingsHAB 10(f623), 03BUZZ 10(a82a), 03XABEN-100 10(a710), 03SP3OSJ/437.7MHz/RTTY/100bd/7n2 10(13b4), 03PICO-25 144.251 MHz CTSTIA32/1000 10(0b32)
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[10:19] <daveake> xaben up
[10:20] <daveake> (separate flight to mine)
[10:21] <Ron_g8fjg> just managed to wash keyboard and pc in cup of hot coffee, desk needed a wash anyway ! most of the letters working it would seem...sofar
[10:21] <fsphil> since I got a good keyboard, food and liquids are not allowed on my desk :
[10:21] <fsphil> :)
[10:22] <Geoff-G8DHE> Listening
[10:23] <pb0ahx> pb0ahx listening also for X0
[10:24] <Ron_g8fjg> it was the fan cooling the pc..fell over taking cup with it, only slight panic
[10:27] <pb0ahx> !dial a710
[10:27] <SpacenearUS> 03pb0ahx: Latest dials for 03X0 10(a710): 03434.404 MHz, 434.40117 MHz
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[10:36] <gonzo__> daveake, any lora on these flights?
[10:36] <SpacenearUS> New vehicle on the map: 03LCARS_chase - 12https://tracker.habhub.org/#!qm=All&q=LCARS_chase
[10:38] <daveake> yes on mine
[10:39] <daveake> 434.450 mode 2
[10:39] <Geoff-G8DHE> Doesn't X0 alternate between RTTY and LoRa ?
[10:39] <gonzo__> ta, will paSS THAT ON
[10:39] <Ron_g8fjg> dont I see lora on 405
[10:39] <pjm> i have my lora node configured
[10:40] <Geoff-G8DHE> Oh? Last week it was doing 1 LoRa on the minute with RTTY inbetween on 434.405
[10:42] <SpacenearUS> New vehicle on the map: 03ZURG - 12https://tracker.habhub.org/#!qm=All&q=ZURG
[10:45] <pb0ahx> Lora also stanby here
[10:45] <pb0ahx> +d
[10:48] <Geoff-G8DHE> Yes just checked back when it was the backup to the WDF1 flight it was one LoRa packet every 2minutes the rest of the time was RTTY
[10:50] <Geoff-G8DHE> 10:49:39 Ch1: $$X0,353,10:49:42,52.33736,0.01133,5587,12,3,3.23,00*FE90
[10:54] <Geoff-G8DHE> Its also drifting High it seems
[10:55] <pb0ahx> yes drifting a lot here
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[11:05] <SpacenearUS> New position from 03IV3SRD-11 after 039 hours silence - 12https://tracker.habhub.org/#!qm=All&q=IV3SRD-11
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[11:16] <lz1dev> fsphil: have you selected the setting to hide it?
[11:17] <SpacenearUS> New vehicle on the map: 03BUZZ - 12https://tracker.habhub.org/#!qm=All&q=BUZZ
[11:18] <SpacenearUS> New vehicle on the map: 03G8KHW_chase - 12https://tracker.habhub.org/#!qm=All&q=G8KHW_chase
[11:19] <SpacenearUS> New position from 03M10RS-11 after 032 days silence - 12https://tracker.habhub.org/#!qm=All&q=M10RS-11
[11:21] <fsphil> lz1dev: clicking on the question mark hides it, until I load it again
[11:21] <SpacenearUS> New position from 03S-15 after 0315 hours silence - 12https://tracker.habhub.org/#!qm=All&q=S-15
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[11:27] <swaledale> !flights
[11:27] <SpacenearUS> 03swaledale: Current flights: 03KingsHAB 10(f623), 03BUZZ 10(a82a), 03XABEN-100 10(a710), 03SP3OSJ/437.7MHz/RTTY/100bd/7n2 10(13b4), 03PICO-25 144.251 MHz CTSTIA32/1000 10(0b32)
[11:27] <swaledale> !dial a82a
[11:27] <SpacenearUS> 03swaledale: Latest dials for 03ZURG 10(a82a): none
[11:27] <SpacenearUS> 03swaledale: Latest dials for 03BUZZ 10(a82a): none
[11:27] <swaledale> !dial a710
[11:27] <SpacenearUS> 03swaledale: Latest dials for 03X0 10(a710): 03434.406374 MHz, 434.4077 MHz, 434.40666 MHz, 434.407038 MHz, 434.40564 MHz, 434.406395 MHz, 434.40734 MHz, 434.406417 MHz, 434.406448 MHz, 434.4061 MHz, 434.406438 MHz
[11:28] <lz1dev> fsphil: check your settings
[11:31] <pb0ahx> lora wil not writing here mmmmmm
[11:33] <Ron_g8fjg> lora 434.415 mode 0 just got it going
[11:33] ayudag (c121ed57@gateway/web/freenode/ip.193.33.237.87) joined #highaltitude.
[11:34] <pb0ahx> Ron_g8fjg, i go trying with that settings
[11:34] <pb0ahx> hge is strong here
[11:34] <ayudag> Hi to All, At what frequency works S13??
[11:35] <Geoff-G8DHE> !flights
[11:35] <SpacenearUS> 03Geoff-G8DHE: Current flights: 03KingsHAB 10(f623), 03BUZZ 10(a82a), 03XABEN-100 10(a710), 03SP3OSJ/437.7MHz/RTTY/100bd/7n2 10(13b4), 03PICO-25 144.251 MHz CTSTIA32/1000 10(0b32)
[11:35] <Geoff-G8DHE> S13 isn't registered on the habitat database so no idea!
[11:38] <Geoff-G8DHE> fsphil, Go into the settings Icon and change the setting for display.
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[11:42] <pb0ahx> first lora pakket reveived
[11:43] <Upu> lora from what ?
[11:43] <Geoff-G8DHE> X0
[11:43] <pb0ahx> xo
[11:44] <Upu> oh its doing lora too
[11:44] <Upu> didn't realise
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[11:45] <pb0ahx> upu i nee a picam u have it ??
[11:45] <Upu> nope sorry
[11:45] <pb0ahx> mmm and gps module ?
[11:46] <Upu> I have GPS mdules
[11:46] <pb0ahx> ok tnx
[11:46] <Upu> I've never sold camera
[11:46] <pb0ahx> ok how can i find it i need 1
[11:48] <swaledale> is X0 just doing RTTY?
[11:49] <pb0ahx> yes
[11:49] <pb0ahx> now lora
[11:49] <pb0ahx> now rtty
[11:49] <swaledale> huh?
[11:50] <dbrooke> every 11th sentence is LoRa, rest are RTTY
[11:50] <pb0ahx> doing 1 LoRa on the minute with RTTY inbetween on 434.405
[11:50] <Geoff-G8DHE> Once a every two minutes its sends LoRA, the rest of the time it send RTTY
[11:51] <swaledale> thanks
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[11:51] <swaledale> !dial a710
[11:51] <SpacenearUS> 03swaledale: Latest dials for 03X0 10(a710): 03434.40479 MHz, 434.4077 MHz, 434.40563 MHz, 434.406035 MHz, 434.406338 MHz, 434.405948 MHz
[11:52] <Upu> try Farnell pb0ahx
[11:52] <Upu> Adafruit etc
[11:52] <edmoore> https://www.eventbrite.co.uk/e/wuthering-bytes-2016-festival-day-tickets-25796750776
[11:52] <edmoore> maybe of interest to up north people
[11:52] <edmoore> also note handsomely demonstrated rocket
[11:54] <PA0RPA> X0 is drifting and fading like hell !
[11:54] <Geoff-G8DHE> You would probably drift off if the temperature was -40 degrees ;-)
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[11:59] <pjm> sorry if i have missed but whats the lora parms for X0 ?
[11:59] <Geoff-G8DHE> Explicit, 20.8k, SF11, EC4:8 LDRO
[11:59] <pjm> ah mode 0
[11:59] <pjm> great thanks
[12:00] <Upu> is there a live stream of hte launch ?
[12:00] <PA0RPA> I have seen more stable payloads under the same conditions Geoff !
[12:00] <pjm> doing everything remotely so hopefully i have left it all connected properly
[12:00] <Geoff-G8DHE> I do agree!
[12:01] <Geoff-G8DHE> No idea what the temp is so it might not even be that!
[12:01] <swaledale> not aware of a stream upu
[12:02] <swaledale> assume daveake launching after X0 landing?
[12:02] <Geoff-G8DHE> They use different freq's.
[12:03] <AndyEsser> edmoore: ta for link
[12:08] <Geoff-G8DHE> Ah yes burst
[12:09] <Geoff-G8DHE> Ah latest LoRa still ascending ??
[12:11] <swaledale> !dial a710
[12:11] <SpacenearUS> 03swaledale: Latest dials for 03X0 10(a710): 03434.406899 MHz, 434.4077 MHz, 434.40663 MHz, 434.407338 MHz, 434.40581 MHz, 434.4059 MHz, 434.406879 MHz, 434.407035 MHz
[12:14] <pb0ahx> http://imgur.com/f8hHmem
[12:15] <pb0ahx> lora going very well here nice see picture
[12:18] <SpacenearUS> New position from 03KD0HIP-7 after 032 days silence - 12https://tracker.habhub.org/#!qm=All&q=KD0HIP-7
[12:18] <Geoff-G8DHE> http://360.g8dhe.net/HAB_Flights/2016_Flights/XABEN-100_20160719/Capture.JPG
[12:20] <Upu> so lora is on 407 as well ?
[12:20] <Ron_g8fjg> about 411
[12:21] <Geoff-G8DHE> yes shares rtty and lora same chip
[12:23] <pb0ahx> now rtty on 405 and lora on 407 here nice
[12:24] <Ron_g8fjg> two LoRa rx's different antenna here rx'd qrg shows 411.1 and 413.2
[12:24] <swaledale> 434.4134
[12:25] <Geoff-G8DHE> LoRa and Rtty w/F lower right trace http://360.g8dhe.net/HAB_Flights/2016_Flights/XABEN-100_20160719/Screenshot-2016-07-19-132506.png
[12:29] <ayudag> At what frequency works S13??
[12:31] <Geoff-G8DHE> Not sure but web page http://qrp-labs.com/ultimate3/ve3kcl-balloons/ve3kcl-s14.html
[12:31] <ayudag> mode?
[12:31] <Geoff-G8DHE> http://qrp-labs.com/ultimate3/ve3kcl-balloons/ve3kcl-s13.html
[12:31] <ayudag> ok
[12:34] <swaledale> hmm anyone know why lora g/w would give curl_easy_perform() failed: Timeout was reached? issue uploading to habitat perhaps?
[12:35] <Ron_g8fjg> I dont know why, but I get it too
[12:36] <swaledale> im hopinh its just dodgy wifi signal or something
[12:38] <dbrooke> my antenna doesn't work well at 75° elevation, range is only 40km but it's mostly up
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[12:41] Action: Geoff-G8DHE Going for a byte to eat!
[12:41] <swaledale> Pop
[12:42] <swaledale> Hmm. negative then up again
[12:43] <Upu> we have a rule on here
[12:43] <Upu> never say pop unless you're 100% :)
[12:43] <swaledale> haha fair enough!
[12:43] <Upu> btw 10p says this is Steve using a 2013 Hwoyee 1600 to try break the altitude record for his 100 official flight
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[12:44] <swaledale> could well be, a bit of random performance from those old balloons
[12:45] <pb0ahx> WOW 42km
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[12:45] <Upu> daveake are you launching today or just sun bathing ?
[12:46] <craag> 44379m to beat then.
[12:46] <mattbrejza> where is the ssdv from?
[12:46] <number10> looks like rocketboys batch AJ may do the trick
[12:46] <Upu> a launch this morning
[12:46] <flutterbat> whats the payload?
[12:46] <mattbrejza> oh right, time is old
[12:47] <Upu> a very small tracker
[12:47] <Upu> not seen it but will be < 20g I bet
[12:47] <flutterbat> i see. i was hoping for a go pro
[12:47] <flutterbat> :p
[12:47] <Upu> lol
[12:47] <Upu> no
[12:47] <Upu> about to knock me off 7th
[12:48] <flutterbat> nah i figured it would be something tiny
[12:48] <fsphil> 43km
[12:48] <Upu> done
[12:48] <craag> shooting up now
[12:48] <flutterbat> is it launched by one of the users here?
[12:48] <Upu> :/ 8th
[12:48] <Darkside> jeez 7.2
[12:48] <Upu> yes rocketboy
[12:49] <flutterbat> cool
[12:49] <Upu> you know the rules if it starts to slow down...
[12:49] <fsphil> it's doing some speed
[12:49] <Upu> 5th
[12:49] <swaledale> go on son
[12:50] <Upu> 3rd
[12:50] <craag> not far now
[12:50] <flutterbat> is there a competition going on?
[12:50] <craag> world record is 44379m flutterbat
[12:50] <Upu> unofficially for years flutterbat :)
[12:50] <Upu> https://ukhas.org.uk/general:uk_records
[12:50] <craag> (amateur)
[12:50] <fsphil> 44km
[12:50] <pb0ahx> wat is the altitude record ??
[12:50] <craag> 44379m pb0ahx
[12:50] <fsphil> soooo close
[12:50] <pb0ahx> tnx
[12:50] <Upu> 2nd...
[12:51] <Upu> oh wobbly....
[12:51] <gonzo__> and ZURG is up
[12:51] <Upu> lol
[12:51] <Upu> matched record
[12:51] <fsphil> hah
[12:51] <swaledale> wowzers
[12:51] <Upu> and broken
[12:51] <Darkside> 44430!
[12:51] <flutterbat> nice
[12:51] <adamgreig> cor
[12:51] <fsphil> got it
[12:51] <Darkside> blimey
[12:51] <pb0ahx> XO congrats
[12:51] <Upu> wonder if this was a double balloon launche
[12:51] <PH3V> Champagne!
[12:51] <number10> shame he forgot the gas on saturday
[12:51] <swaledale> lol
[12:52] <Upu> he tested this the other week
[12:52] <adamgreig> does he has to recover for it to count ;)
[12:52] <Geoff-G8DHE-M> SSDV was KingsHAB earlier this morning
[12:52] <number10> I broght a bottle of fizzy along to celebrate
[12:52] <Upu> congrats number10 to him if you're there
[12:52] <fsphil> 44.7
[12:52] <fsphil> mad
[12:52] <craag> will it break 45
[12:52] <number10> I think you have to recover for the highes pictures record unless ssdv I would say
[12:52] <number10> not there Upu :(
[12:53] <Upu> 45km
[12:53] <mattbrejza> last time steve put a little 808 cam on it?
[12:53] <fsphil> 45km
[12:53] <fsphil> sheesh
[12:53] <Upu> burst
[12:53] <Upu> 45003m :)
[12:53] <adamgreig> nice
[12:53] <fsphil> wheee
[12:53] <craag> incredible
[12:53] <adamgreig> well timed
[12:53] <adamgreig> be a shame to just miss 45km
[12:53] <Laurenceb> 45km wow
[12:53] <pb0ahx> WOOOOOOW 45.003
[12:53] <PH3V> :-)
[12:53] <Upu> well we thought a latex could do it just never prove it
[12:53] <number10> and on xaben 100 so double celebration
[12:54] <Laurenceb> what envelope was this with?
[12:54] <number10> thats the last of the AJ batch 1600s
[12:54] <Upu> 1600g Hwoyee circa 2013
[12:54] <swaledale> !flights
[12:54] <SpacenearUS> 03swaledale: Current flights: 03KingsHAB 10(f623), 03BUZZ 10(a82a), 03XABEN-100 10(a710), 03SP3OSJ/437.7MHz/RTTY/100bd/7n2 10(13b4), 03PICO-25 144.251 MHz CTSTIA32/1000 10(0b32)
[12:54] <number10> I have an AJ 1200 all I need to do is make a 5g payload
[12:54] <swaledale> !dial a82a
[12:54] <SpacenearUS> 03swaledale: Latest dials for 03ZURG 10(a82a): none
[12:54] <SpacenearUS> 03swaledale: Latest dials for 03BUZZ 10(a82a): none
[12:54] <Laurenceb> ah
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[12:55] <fsphil> wonder if the weather has an effect
[12:55] <swaledale> wonder what daveake has on his
[12:55] <Laurenceb> fsphil: probably
[12:55] <swaledale> could be a minicomp between them both
[12:55] <Laurenceb> hot weather increases atmospheric thickness
[12:55] <fsphil> indeed
[12:55] <fsphil> would it allow the latex to stretch more?
[12:55] <swaledale> !dial a82a
[12:55] <SpacenearUS> 03swaledale: Latest dials for 03ZURG 10(a82a): none
[12:55] <SpacenearUS> 03swaledale: Latest dials for 03BUZZ 10(a82a): none
[12:56] <Laurenceb> unlikely, at altitude I'm not sure if there is exceptional weather
[12:56] <fsphil> true, the sun will be about as intense up there at any time of the year
[12:56] <pb0ahx> X0 Team mni congrats with ur 100e flight and an new uk reocrd at 45003 km very nice
[12:57] <number10> its a team of one pb0ahx
[12:57] <Laurenceb> if there is anyone who deserves the record its Rocketboy
[12:57] <Laurenceb> 100 launches wow
[12:57] <flutterbat> 100 height record attempts?
[12:58] <flutterbat> altitude*
[12:58] <number10> no not all record attempts
[12:58] <gonzo__> interestingly was falling at about 1/4 of the speed of a bullet
[12:58] <flutterbat> what kind of gas was the balloon using? H ?
[12:58] <number10> H2
[12:58] <swaledale> hardly worth puttin a chute on 20g :)
[12:59] <gonzo__> that is definitly falling with style!
[12:59] <Laurenceb> I suspect that H2 increases envelope performance beyond what you would expect
[12:59] <Laurenceb> probably due to protection from ozone damage
[12:59] <number10> opps not sure where that 2 came from
[13:00] <AndyEsser> can I do my first launch, get the altitude record, and do a controlled landing in one flight...
[13:00] <AndyEsser> :)
[13:00] <flutterbat> Laurenceb: you mean it diffuses through the latex and reacts with the ozone?
[13:00] <Laurenceb> yes
[13:00] <Upu> Getting curl_easy_perform() failed: Timeout was reached from lora gateway
[13:00] <Upu> server issue ?
[13:00] <fsphil> I think hydrogen is normally H2?
[13:01] <Laurenceb> yes
[13:01] <adamgreig> AndyEsser: can you.. do a first launch ;)
[13:01] <swaledale> upu been getting that here too
[13:01] <AndyEsser> adamgreig: hehe
[13:01] <AndyEsser> Soon (TM)
[13:01] <AndyEsser> finding time :(
[13:01] <fsphil> atomic hydrogen would escape the balloon quicker than helium
[13:01] <swaledale> saw that error a few days ago too
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[13:01] <swaledale> AndyEsser let me know if you want a hand, excuse to return up North etc :)
[13:02] <AndyEsser> swaledale: definitely :)
[13:02] <AndyEsser> might struggle to do it all on my own
[13:02] <AndyEsser> just need to pull my finger out and get the PCB designed, ordered and built
[13:02] <swaledale> yeah, its a bit hard!
[13:02] <fsphil> interesting dip on the altitude graph during ascent
[13:03] <swaledale> is that when it reported a drop, when i called pop?
[13:03] <gonzo__> I just dead bug my trackers
[13:03] <swaledale> 13:40 approx
[13:04] <fsphil> 40800 down to 40568, before rising again
[13:04] <swaledale> yeah
[13:05] <swaledale> i saw that, it shows about -3m/s at the time
[13:05] <fsphil> I wonder if it was something steve did intentionally
[13:05] <Laurenceb> he is trolling us
[13:05] <Geoff-G8DHE> The signal also faded a lot at that point I commented on here
[13:05] <swaledale> did the horizontal speed to anything at the time i wonder
[13:05] <Laurenceb> luckily raw data is saved on habhub
[13:05] <fsphil> I trust him not to do a mexican launch
[13:05] <Laurenceb> we have raw data to check
[13:06] Action: Laurenceb grabs it
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[13:11] <flutterbat> fsphil: what is a mexican launch?
[13:11] <pb0ahx> !dial a82a
[13:11] <SpacenearUS> 03pb0ahx: Latest dials for 03ZURG 10(a82a): none
[13:11] <SpacenearUS> 03pb0ahx: Latest dials for 03BUZZ 10(a82a): 03434.4077 MHz, 434.2502 MHz, 434.25096 MHz
[13:12] <Laurenceb> hmm there is a bit of noise on the altitude
[13:12] <swaledale> yeah
[13:12] <Laurenceb> looks like the GPS wasnt working that well, only 6 sats a lot of the time
[13:12] <Laurenceb> but looks like noise rather than any fudging to me, altitude record is safe :D
[13:12] <swaledale> it takes a southerly direction momentarily at the time it drops about 90m
[13:12] <flutterbat> the record starts to crumble :p
[13:12] <fsphil> flutterbat: there was a team who launched in mexico, claimed the altitude record with a balloon and payload that couldn't possibly have done it
[13:13] <flutterbat> :(
[13:13] <swaledale> is Zurg running LoRa?
[13:13] <craag> it was found after that they were using a pressure sensor to measure altitude, into an ardupilot which only does the maths correctly up to a few km iirc
[13:13] <Geoff-G8DHE> Should be running LoRa
[13:14] <Geoff-G8DHE> 434.4500MHz
[13:14] <Geoff-G8DHE> Explicit, 62.5k, SF8, EC4:8
[13:14] <flutterbat> that being said i find it odd that the old record got utterly destroyed.
[13:14] <swaledale> anyone received it and got a true Freq?
[13:14] <Geoff-G8DHE> It isn't flying yet!
[13:14] <dbrooke> 434.4575MHz
[13:14] <swaledale> It is flying
[13:14] <Geoff-G8DHE> Oh tell a lie got up without me seeing it
[13:14] <dbrooke> Zurg ^^
[13:15] <fsphil> Zurg is sneaky
[13:15] <swaledale> dbrooke thx
[13:15] <Laurenceb> noise correlates with sats being lost
[13:15] <Laurenceb> nothing to see here, move on :P
[13:15] <swaledale> agree
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[13:19] <michal_f> hello
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[13:22] <daveake> Hi guys
[13:22] <fsphil> howdy
[13:22] <Geoff-G8DHE> Downed the Champagne then ?
[13:22] <daveake> I think I must be Steve's lucky charm :)
[13:23] <daveake> Yeah later
[13:23] <fsphil> not unless you beat him now
[13:23] <daveake> Steve will probably come over to help with my flight after his, then I promised him a congratulatory drink :)
[13:24] <daveake> Er this is 1.5kg of (stuff I can't talk about :p)
[13:24] <daveake> no records for me today
[13:24] <fsphil> full fat hab launch
[13:24] <daveake> yup
[13:24] <daveake> 24cm cube
[13:24] <daveake> 4 cameras
[13:24] <daveake> felt like old times
[13:25] <Upu> no ssdv daveake ?
[13:25] <daveake> no 'cos it's secret :/
[13:25] <Upu> its an ard life
[13:25] <daveake> too true
[13:25] <daveake> too damn hot
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[13:29] <dbrooke> X0 predictions are pretty close to a friend's field; it would be amusing if it landed there.
[13:29] <fsphil> nobody's managed to land in another hab'ers garden yet
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[13:31] <notm0nty> Hi guys, trying to track BUZZ - could someone answer a noob question? when a frequency for a baloon is givenlike 434.25, does it mean in SDRSharp 434.000.250 or is it 434.250? Thanks
[13:31] <PA0RPA> 434.250 is also in Sharp 434.250 !
[13:32] <notm0nty> it's listed as 434.25, comes up in sdr sharp as 434.000.250 when I type it in
[13:33] <dbrooke> east of Baldwin's Drove, south of Cemetery Rd, with all the horses in it, but current prediction has moved SW of there
[13:33] <pjm> fsphil, during the craze of wx-sonde hunting in the UK, I had a sonde from salisbury land in my garden
[13:33] <fsphil> nice
[13:33] <pjm> it was some vaisala thing
[13:33] <pjm> the parachute + cord etc landed in my neighbours garden
[13:33] <fsphil> yeah they still use them as far as I know
[13:33] <pjm> which was recovered and given to gonzo__ who re-flew it
[13:36] <gonzo__> that was the one that went up as a bonzo flight. mfa298 recovered it and I still have it
[13:36] <Laurenceb> oh nice, tracker has OS maps
[13:36] <Laurenceb> v pro
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[13:37] <gonzo__> very useful to see what the local ASL is
[13:37] <Geoff-G8DHE> notm0nty, Are you hitting the "." key and so jumping to the after the decimal ?
[13:38] <Geoff-G8DHE> enter it as 434250
[13:39] <pb0ahx> is BUZZ also in lora on 450 ???
[13:39] <notm0nty> Thanks - I just wasn't sure if a flight listed as 424.25 is 434.250, or 424.25
[13:39] <Geoff-G8DHE> ZURG is .450 LoRA
[13:39] <gonzo__> tis tha sme
[13:39] <gonzo__> same
[13:39] <pb0ahx> BUZZ=ZURG :-(
[13:40] <Geoff-G8DHE> two payloads different Tx's different callsigns one balloon
[13:40] <pb0ahx> Geoff-G8DHE, tnx
[13:40] <notm0nty> Cool, thanks
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[13:59] <pb0ahx> some body writing LORA from BUZZ ??
[13:59] <Geoff-G8DHE> I'm Rx ZURG Tx on LoRa
[13:59] <dbrooke> BUZZ is RTTY, ZURG is LoRa
[14:00] <pb0ahx> ok wat mode for zurg ?
[14:00] <Geoff-G8DHE> Explicit, 62.5k, SF8, EC4:8
[14:00] <dbrooke> mode 2
[14:00] <pb0ahx> yes now i writing him tnx info
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[14:04] <pb0ahx> lora going very well today here i am happy now :-O
[14:11] <daveake> cool
[14:11] <daveake> just stopped
[14:11] <daveake> (me, not tracker)
[14:13] <daveake> ping lz1dev
[14:13] <daveake> Can you set buzz/zurg for a 38km burst please
[14:13] <daveake> (not 45 :) )
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[14:21] <fl_0> .flights
[14:21] <SpacenearUS> 03fl_0: Current flights: 03KingsHAB 10(f623), 03BUZZ 10(a82a), 03XABEN-100 10(a710), 03SP3OSJ/437.7MHz/RTTY/100bd/7n2 10(13b4), 03PICO-25 144.251 MHz CTSTIA32/1000 10(0b32)
[14:22] <fl_0> .dial a82a
[14:22] <SpacenearUS> 03fl_0: Latest dials for 03ZURG 10(a82a): none
[14:22] <SpacenearUS> 03fl_0: Latest dials for 03BUZZ 10(a82a): 030.01 MHz, 434.250559 MHz, 434.250613 MHz, 434.2506 MHz, 434.250957 MHz, 434.24942 MHz, 434.25 MHz, 434.250946 MHz, 434.251037 MHz
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[14:31] <SM0ULC-Reb> Please add hysplit to S-15
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[14:38] <Laurenceb> anyone here used bluetooth rfcomm under linux?
[14:38] <Laurenceb> know how to fix the Can't create RFCOMM TTY: Address already in use error?
[14:39] <Laurenceb> other than rebooting lol
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[14:46] <pb0ahx> wy uploaded my lora random pakkets to the site in my sreen i see 450 pakkets and on the site 60 in lora mode
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[15:04] <daveake> Yeah that's been reported before
[15:04] <daveake> Need to have a look
[15:06] <daveake> 39km not bad for 1.5kg
[15:06] <daveake> bursty
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[15:12] <pb0ahx> nice 39.085 km very good
[15:13] <pb0ahx> telem packets=697 Bad crc=19 Bad type=0
[15:14] <pb0ahx> one of mij best lora receivings
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[15:16] <pb0ahx> BUZZ/ZUGG Team mni tnx for good flight a verry stable signaal here it was a nice flight for me tnx
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[15:19] <SpacenearUS> New vehicle on the map: 03KD0MVU - 12https://tracker.habhub.org/#!qm=All&q=KD0MVU
[15:21] <Evya89> hello everyone. what do you do to prevent from ice chips inside the balloon to burst it?
[15:21] <adamgreig> don't put water inside the balloon, helps
[15:22] <craag> helium instead works great
[15:22] <adamgreig> yep
[15:22] <craag> or hydrogen, just don't burn it first.
[15:22] <adamgreig> and if you are getting helium ice crystals then you have other problems
[15:24] <edmoore> i feel like solid helium is probably impossible at any pressure you might find anywhere outside on earth
[15:24] <edmoore> regardless of temp
[15:24] <adamgreig> hence other problems
[15:24] <SM0ULC-Reb> Please add hysplit to S-15?
[15:24] <edmoore> i got 1e-99Pa probably but solid helium ain't one
[15:24] <edmoore> problems*
[15:25] <adamgreig> solid helium is pretty weird stuff
[15:25] <Evya89> and for a balloon 1200. to fill it with 6-7 cube helium is it too much? I want it to climb at 8 m/s with 1kg of payload. Someone told me it is too much helium and that I can't do it because it will burst close to the ground
[15:25] <adamgreig> http://habhub.org/calc/
[15:26] <Evya89> did it
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[15:26] <Evya89> the reality shows sometimes different
[15:26] <edmoore> you probably won't get a better predicted answer than what that calculator says
[15:27] <edmoore> you may get lucky or unlucky
[15:27] <edmoore> i will say though that 8m/s is quite high
[15:27] <edmoore> for a balloon of the sort we fly
[15:28] <edmoore> and i would be tempted to redesign your balloon/flight/payload/whatever so that you can get an acceptable flight at more like 5m/s
[15:29] <edmoore> it's not completely mad though, it's just quite a lot
[15:29] <Evya89> do you know why 8 m/s is high?
[15:30] <edmoore> yes?
[15:30] <edmoore> that's a strange question but i'll give you a sort of answer
[15:30] <edmoore> the drag from air resistance against an ascending balloon goes up with the square of the velocity at which it ascends
[15:31] <edmoore> so if you have one balloon going up at 5m/s and a second balloon going up at 10m/s, that second balloon is going twice as fast and so the drag is 4 times higher (2*2 = 4)
[15:31] <edmoore> so it has to have a lot more helium than the 5m/s balloon to reach that speed
[15:31] <edmoore> however, of course if you put more helium in the balloon then it will get bigger
[15:32] <edmoore> this means that it will have a bigger frontal area for the air resitance to act against
[15:32] <edmoore> so infact you need even more helium to overcome this bigger force
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[15:32] <edmoore> the point is, as you increase the vertical speed by a little, you increase the helium requirement by a lot
[15:33] <edmoore> and that means that the burst altitude comes down, and the balloon is harder to handle on the ground, and you need bigger or multiple cylinders of helium to fill your balloon
[15:33] <craag> also the balloon tends to deform with large amounts of drag, often becoming less aerodynamic and cancelling out your advantage
[15:33] <edmoore> in short, if this is your first flight, i wouldn't go for such a high ascent unless you don't mind things being harder than normal
[15:35] <Evya89> thank you a lot! what is the fastest speed you recommend?
[15:35] <edmoore> 6-7 probably
[15:35] <edmoore> but we normally say 5m/s is a good speed to aim for
[15:35] <Evya89> ok thank you!!
[15:36] <edmoore> and have the option of pushing to 6-7m/s if the winds are really bad and so you need it to go up and down faster
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[16:06] <daveake> buzz/zurg recovered
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[16:14] <SpacenearUS> New vehicle on the map: 032e0pnp
[16:14] <SpacenearUS> _chase - 12https://tracker.habhub.org/#!qm=All&q=2e0pnp%0A%20%20%20%20_chase
[16:16] <daveake> easy walk into a field
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[17:01] <arjunnaha> How much should a professional antenna install cost for an X50; where the antenna and cabling have already been brought, but the mast and bracketing need to be put up?
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[17:18] <Laurenceb> https://www.youtube.com/watch?v=0L00VP88N8w
[17:23] <SA6BSS-Mike|2> arjunnaha: I?say around 250 give and take 50, lets see what the others think.
[17:24] <arjunnaha> SA6BSS-Mike|2: Bloody hell, not expecting that much for someone to climb up a ladder and screw some bolts
[17:29] <dbrooke> arjunnaha: seems quite variable - http://www.whatprice.co.uk/prices/household/tv-aerial-install.html
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[17:32] <arjunnaha> dbrooke: I'll find out on Thursday! Should be on the lower scale as I'm just putting the cable end into a locked external box and then feed into a window. Although if I'm getting it done professionally I might get them to put it through a wall
[17:34] <mfa298> arjunnaha: it maybe worth getting in touch with your local amateur radio club, you might find someone there knows of a good installer
[17:35] <arjunnaha> mfa298: On my list on things to do is to get my foundation licence, so I might as well get in touch now and kick-start that process
[17:37] <mfa298> you may find they can help out with kit/advice/ putting connector on cables (and testing them) as well.
[17:38] <mfa298> clubs can be a bit varied though
[17:39] <arjunnaha> My local club is Reading, looks like a good club
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[17:55] <Geoff-G8DHE-M> arjunnaha, I had my domestic TV aerials replaced a couple of months back and that was 2-3 hours work for £40/hr aerial riggers have high insurnce costs!
[17:56] <arjunnaha> I can imagine their public liability is out of this world
[17:56] <Geoff-G8DHE-M> Also personal insurance falling off ladders roofs is expensive!
[17:57] <russss> you might say...sky high.
[17:57] Action: SpeedEvil has been pondering ways to attach a nailgun to a quadcopter.
[17:58] <Geoff-G8DHE-M> But yes have a word with the local club, quite often there are those who have the gear and experience happy to help.
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[17:58] <dbrooke> A friend of mine has used an installer who also happens to have a radio license so understands the requirements.
[18:00] <Geoff-G8DHE-M> Yes explaining that no I don't want that aerial turned vertical because the TV station in Brighton is a relay, the TV station I'm pointing at is NOT a relay then having to show him!
[18:03] <fsphil> the relays here are vertical
[18:03] <fsphil> wonder how they decide which way to go in each area
[18:03] <arjunnaha> It was a bit of pick and mix trying out all the different installation companies. "Do you install ametuer radio antennas" always wielded a different response
[18:04] <Geoff-G8DHE-M> Yes but our repeater is horizontal and no where near the same band ! GB3VR/GB3RV
[18:04] <fsphil> I've had some awful tv installers around before
[18:05] <dbrooke> usually relays are vertical and main transmitters horizontal
[18:05] <fsphil> the last one replaced a band-specific booster in my loft with a wideband one, took the good one with him. I wasn't there at the time sadly
[18:05] <fsphil> this after describing to him the problem was with the aerial on the roof
[18:05] <fsphil> he didn't even go up
[18:07] <fsphil> it was a good sign when the next one started using what looked like quite a nice dvb signal analyser as soon as he arrived
[18:08] <fsphil> he lowered the height of the aerial and it fixed the problem. goes against how I'd think uhf normally works
[18:09] <dbrooke> multipath reflections probably, not sure how they affect DVB but gave ghosting on analogue
[18:10] <PE2BZ> fsphil the cable was maybe to short ;-)
[18:10] <fsphil> yeah. I didn't have the sdr's back then, but I imagine there would've been a nice null in some spots
[18:10] <arjunnaha> Well hopefully, you can't f**k up too much climbing a ladder, screwing a bracket in and tightening some U bolts
[18:11] <arjunnaha> But there again, there is room for disaster
[18:11] <fsphil> yeah even a simple colinear install can be done badly
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[18:11] <fsphil> cables not properly tied down for example
[18:11] <fsphil> you don't want them flapping about
[18:12] <dbrooke> there was a web site of pictures of horrible installations
[18:12] <fsphil> does the x50 come with tape to waterproof it?
[18:12] <fsphil> I can't remember
[18:12] <fsphil> the installer will need to put that one
[18:12] <fsphil> on*
[18:13] <arjunnaha> Tape??
[18:13] <arjunnaha> Oh dear
[18:13] <fsphil> yeah, self amalgamating tape
[18:13] <arjunnaha> It had been up on a building for just under a year without any tape
[18:13] <Geoff-G8DHE-M> They normally have there own self amalgmating tape!
[18:13] <fsphil> I think it comes with a small strip of it rolled up
[18:13] <fsphil> I have an unused one, I'll see if it had it
[18:17] <dbrooke> http://www.aerialsandtv.com/cowboyslocker.html
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[19:19] <SpacenearUS> New vehicle on the map: 03JMHS - 12https://tracker.habhub.org/#!qm=All&q=JMHS
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[19:32] <SM0ULC-Reb> Please add hysplit to S-15!
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[19:58] <amell> anyone track zurg today?
[19:58] <amell> how was the frequency specified? seems i didnt pick it up at all :(
[20:01] <amell> reading back it was 434.4575MHz, i am tuned to 434.4422Mhz,
[20:01] <amell> AFC seems to have pulled it down a bit.
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[20:33] <Geoff-G8DHE-Tab> It drifted high to begin with
[20:33] <Geoff-G8DHE-Tab> Not sure I tracked it drift after that and drift isn't in the packet log :-(
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[21:09] <KF5WYX> hi all.
[21:09] <KF5WYX> Just wanted to drop this link, and watch for thoughts on using a device like this for in-flight image transfer : http://www.newark.com/microchip/rn2483-i-rm095/lora-transceiver-mod-433-868mhz/dp/46Y8499?ost=46Y8499&selectedCategoryId=&categoryName=All+Categories&categoryNameResp=All+Categories
[21:09] <KF5WYX> Spec sais upto 15km range.
[21:11] <fsphil> the hoperf lora modules have been used for data. range was pretty good but I don't have the exact figure
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[21:13] <KF5WYX> I'm slightly cheesed off that the industry chopped into the 70cm band for another wireless device, but that aside, I'm wondering if an Atmel328 would be sufficient to negotiate the traffic between a usb camera, an sd-card, and the Lora radio. For recovered images in case of recovery failure.
[21:14] <KF5WYX> Think I'd stick to APRS for primary telemetry.
[21:14] <fsphil> no. you have no hope of interfacing a usb camera to a micro that small
[21:14] <fsphil> if you stick with the atmega you're limited to cameras with a serial port
[21:15] <fsphil> eg: https://www.adafruit.com/product/397
[21:15] <KF5WYX> Yeah, I'm aware of the data rate challenges - but "surely" there's some way to DMA from the camera to an SD, and just drive it from a small controller.
[21:15] <pb0ahx> were can i find the UK hight records ??
[21:16] <KF5WYX> https://ukhas.org.uk/general:uk_records
[21:16] <pb0ahx> tnx
[21:16] <fsphil> I'd be pretty confident in saying usb > sd with a micro is impossible
[21:17] <KF5WYX> *sigh* oh well. Perhaps someday I'll fly a Pi
[21:17] <fsphil> easier to use a Pi
[21:17] <fsphil> that jpeg camera will do the job if you really don't want to use a Pi
[21:18] <fsphil> or you could jump up to a microcontroller that can interface with cameras, like some of the stm32 chips
[21:19] <KF5WYX> Yeah - I'm vested in the Atmel for at least my next two flights, but may expand after that.
[21:19] <kc2pit> There are micros with USB host capability. Can't say I've ever tried to make one run.
[21:19] <kc2pit> USB device-side functionality is annoying enough to configure.
[21:20] <KF5WYX> I can live without a live-feed, however, the US offers it's own challenges to recovery over the UK. (Farms not being farms, but ranches of far greater size, and ranchers tend to legally carry firearms).
[21:20] <KF5WYX> Texans don't hesitate in using them either.
[21:22] <KF5WYX> fsphil - my question on that camera for arduino, I believe you have experience with this, is data transfer rate. Even with small images, I think it would take minutes of consistent data transmission to get a single image back. On the APRS network I'm sure that would upset some operators, and that means having a second radio for data.
[21:23] <kc2pit> Yeah, don't try to send images over the APRS network.
[21:23] <fsphil> well you can, but keep it slow
[21:24] <fsphil> my flights tend to use a continuous low power rtty tx for images
[21:24] <KF5WYX> So while I'm still flying small micros... images are possible but annoyingly difficult, slow, and little value given the resolutions.
[21:25] <fsphil> I found a 320x240 image at 300bps took about 5 minutes
[21:25] <KF5WYX> Could you link me to some of your results?
[21:25] <Ian_> DL7AD and others would dispute the lack of resolution and speed . . .
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[21:26] <fsphil> https://www.flickr.com/search/?sort=date-taken-desc&safe_search=1&tags=ssdv&user_id=31855019%40N05&view_all=1
[21:26] <fsphil> not sure if that link will work for you
[21:26] <KF5WYX> It works, thanks.
[21:27] <fsphil> the jpeg camera ones are 320x240. for the Pi I used 512x288
[21:27] <kc2pit> Finding a decent camera that outputs over UART or SPI would be the hard part, I think. You can get higher-speed radios, since we're not limited to such low power output.
[21:29] <KF5WYX> Well, there's the
[21:29] <KF5WYX> TTL Serial Jpeg NTSC.
[21:30] <KF5WYX> I guess I've made my decision. I'll build the telemetry board first, and if there's time before the flight, I'll try assembling one of those serial camera units with it's own dedicated radio.
[21:30] <fsphil> I don't know what the image quality will be like
[21:30] <KF5WYX> For $40 + some components I already have, I'm willing to give it a shot,
[21:31] <KF5WYX> I also have an existing old 2MP camera which I may try hacking. It is USB, but it's old and supports smaller resolutions and I think it'll UART a still frame.
[21:32] <fsphil> that would be handy
[21:32] <fsphil> ideally you can rate limit it
[21:32] <fsphil> if it sends it full speed you probably have no hope
[21:33] <KF5WYX> It's salvage from an old netbook, using what I believe is an internal usb/uart. My understanding of some of those older cameras is they were built with a frame buffer because the USB-1 protocol wasn't quick enough, or the machines they were built into didn't have the grunt. It's still something of a black box though, and may not do what I think it does.
[21:33] <fsphil> if it's not sending jpeg you the nalso have the problem of compressing it
[21:33] <KF5WYX> roger that, if it's "RAW" you mean?
[21:34] <fsphil> yeah
[21:34] <KF5WYX> will keep in mind, I've gotten into speculation on this thing now.
[21:34] <fsphil> an atmega328 *might* have enough memory to do it, one MCU at a time
[21:38] <KF5WYX> https://robosavvy.com/store/sparkfun-microdrive-module-for-microsd-fat-ttl-uart.html
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[21:57] <SpacenearUS> New vehicle on the map: 03IK8SUT-11 - 12https://tracker.habhub.org/#!qm=All&q=IK8SUT-11
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[22:13] <Laurenceb__> http://www.sadanduseless.com/2016/03/funny-coincidences/
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[23:04] <SpacenearUS> New position from 03IV3SRD-11 after 0310 hours silence - 12https://tracker.habhub.org/#!qm=All&q=IV3SRD-11
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[00:00] --- Wed Jul 20 2016