highaltitude.log.20211116

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[00:15] <SpacenearUS> New position from 03LY1BWB-13 after 0320 hours silence - 12https://tracker.habhub.org/#!qm=All&q=LY1BWB-13
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[06:13] <SpacenearUS> New position from 03KD2FOU-11 after 0317 hours silence - 12https://tracker.habhub.org/#!qm=All&q=KD2FOU-11
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[06:45] <ly2en> okay I've escaped north korea. lessons learned
[06:45] <SA6BSS-Mike> :)
[06:56] <ly2en> what a race over the pacific
[06:57] <ly2en> Dave is first, then me, Stefan somewhere and Mike still over China
[06:58] <SA6BSS-Mike> I will hit USA Westcoast in 3 days
[06:58] <SA6BSS-Mike> the low solar angle really impact some flights
[06:58] <SA6BSS-Mike> not much heard
[06:58] <ly2en> mine woke up at 7 degrees but also not much heard these days
[06:59] <ly2en> it's difficult to get both tlm slots together
[06:59] <SA6BSS-Mike> you probabkly have the cells tilted a bit
[06:59] <ly2en> they are bent into a small arc
[06:59] <SA6BSS-Mike> ok, I saw the pics
[07:00] <SA6BSS-Mike> Dave runs pyramide shaped solar with 18 cells setup I have a magnet pointing the board/solar to South
[07:00] <SA6BSS-Mike> on BSS41
[07:00] <SA6BSS-Mike> and -7
[07:00] <ly2en> all have secrets :)
[07:00] <SA6BSS-Mike> :)
[07:01] <ly2en> how much weight does the magnet add?
[07:01] <SA6BSS-Mike> I see sub 2 ° sruntime on the wspr board, so thats is sucsess
[07:01] <SA6BSS-Mike> 0,6gram
[07:01] <ly2en> i guess worth it
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[07:01] <SA6BSS-Mike> its what ONE 52x26 cells weigs !
[07:02] <ly2en> is it normal to have lower altitudes over the pacific? the hysplit said it can go down few hundred m
[07:02] <SA6BSS-Mike> mostly the balloons go higher the closer to the equator you go
[07:02] <SA6BSS-Mike> the eart rotation puts more air there then over the poles
[07:02] <ly2en> ah right
[07:03] <ly2en> mine went a bit north so got -200m
[07:03] <SA6BSS-Mike> but then as you will see during a flight the altitude varies greatly , mostly arround 1000m if the flight contunes for some time
[07:03] <SA6BSS-Mike> local airspressure
[07:03] <ly2en> last time had only simple WSPR so didn't get to see the fluctuations except when hit APRS coverage
[07:03] <SA6BSS-Mike> or dencety of air, har dto tell from wether maps
[07:04] <ly2en> actually got to know the altitude few weeks into the flight
[07:05] <SA6BSS-Mike> this 4 day flight of 41 have varied from 10160 to 10640
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[07:10] <ly2en> once you see it going up, no more worries :)
[07:11] <SA6BSS-Mike> testing three "new" things on the 41 flight, new solar cells, using 6psc of 52x13 cells, the magnet "pointer" and increased the free lift to 6,2 gram on the washed off Grabo balloon, all working well !
[07:12] <ly2en> I've bought new cells impulsively, clicked something while playing with the kid
[07:12] <ly2en> got a package of 19x39 :)
[07:12] <ly2en> but I tell you either 6x 39x39 are not enough or I'm doing something wrong
[07:13] <ly2en> current flight is 6 of 78x26
[07:14] <ly2en> and overnight reproduced the same error like you on the hab-wspr
[07:18] <SA6BSS-Mike> my prefred cells are 39x19 , 6 of there thay should get you 13-14° with the ict fw, I use 4 with a chargeboost in the summer and get about 20°
[07:19] <SA6BSS-Mike> yes, tested the script last night and and uploaded from a local tracker, also crashed
[07:19] <ly2en> there is literally no sun these days over here, low dense clouds, i have a test cell rig ready
[07:19] <SA6BSS-Mike> if you want to test it I can leave a tracker dry runing you can test the scrpt against
[07:20] <ly2en> if that is no problem with you, sure
[07:20] <ly2en> i have one "official" tlm slot left :)
[07:30] <SA6BSS-Mike> pm you the calls and ch
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[07:39] <ly2en> rrr
[07:39] <ly2en> so now,
[07:39] <ly2en> the script checks the timeslot in the 10 minutes range for both main tx and tlm tx
[07:39] <ly2en> would it make sense if we got tlm on the 20th minute, to take the big square from any slot in the 10th minute?
[07:40] <ly2en> and check if it's +- on the same flight path (just in case on the 20th minute it went to a new BIG square)
[07:41] <ly2en> example, last night I've got 7 main TX gridsquares
[07:41] <SA6BSS-Mike> I have timetrim set for 7 in the script
[07:41] <SA6BSS-Mike> just to awoid this
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[07:43] <ly2en> so that cuts off everything 7 minutes both into past and future ?
[07:44] <ly2en> like, I've got 7 big square spots and 5 telemetry spots but only 2 out of 5 telemetry spots matched the timing of the big spots
[07:45] <ly2en> 2021-11-16 03:08:00 | LY1BWB | RN45 | 10 | KPH
[07:45] <ly2en> 2021-11-16 02:14:00 | LY1BWB | RN35 | 10 | W4HOD
[07:45] <ly2en> so if i'd get tlm packet between 02:16 and 03:06, I could just guess whether it's RN35 or RN45 and match it
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[07:46] <ly2en> not actually prediction, something like crude interpolation
[07:46] <ly2en> does that make any sense or I need more coffee ?
[07:46] <ly2en> :)
[07:47] <SA6BSS-Mike> it does make sence in a way I know what you mean, then if neccesry to implemt it, I dont really know
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[07:48] <ly2en> doing this it will show more data on habhub like height, temp, voltage, etc
[07:48] <ly2en> because now the data is simply dropped
[07:48] <ly2en> if there is no timeslot match to the big spot
[07:50] <SA6BSS-Mike> I dont see this proble as I 90% of the time get a corspodning tele within 7 min or 9 min
[07:51] <SA6BSS-Mike> and thats whn Im out over the vastnes of Asia, closing in to Jap and going out over Pacific I see 100% decoing
[07:51] <SA6BSS-Mike> of corsponding wspr and tele
[07:52] <ly2en> rrr I understand
[07:52] <ly2en> still a learning curve for me, maybe something to do with the 27mhz tcxo tuning
[07:53] <SA6BSS-Mike> I tink I asked you before, how long antenna do you have?
[07:53] <ly2en> you're on TCXO 26MHz right?
[07:53] <ly2en> i have 509mm x2
[07:54] <SA6BSS-Mike> yes, my tcxo is 26
[07:54] <SA6BSS-Mike> rr, the you have the correct lenght
[07:55] <SA6BSS-Mike> hm, are you using the increasing power setup in the fw?
[07:56] <SA6BSS-Mike> that could explain the low count of spots
[07:58] <SA6BSS-Mike> do you have int pwr_level=77; under globla varibales
[08:00] <ly2en> https://github.com/kareiva/ICT-v5-ATGM336/blob/dev/TelemFunctions.h#L167
[08:00] <ly2en> I think you're referring to some new variable that I don't have
[08:04] <SA6BSS-Mike> yes, its not that then, you see that in the geofence fw
[08:05] <SA6BSS-Mike> it will start at low (77) power and incresae one every 10 min seq, to softstart the radio, 79 being max power
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[08:08] <ly2en> in the older code there's only SI5351_DRIVE_8MA setting
[08:09] <SA6BSS-Mike> yes, 8 being max
[08:09] <SA6BSS-Mike> 2 4 6 8
[08:09] <SA6BSS-Mike> are the options
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[10:18] <SpacenearUS> New position from 03M0XER-9 after 0318 hours silence - 12https://tracker.habhub.org/#!qm=All&q=M0XER-9
[10:27] <LeoBodnar> m0xer is in high pressure over europe, gained 1km altitude vs USA last week
[10:30] <LeoBodnar> are you using height over earth ellipsoid or amsl from GPS?
[11:04] <SA6BSS-Mike> have no idea what the deaffault setting is of the argm336
[11:20] <SpacenearUS> New position from 03N4XWC-1 after 0312 hours silence - 12https://tracker.habhub.org/#!qm=All&q=N4XWC-1
[11:25] <SA6BSS-Mike> seems the gps receiver mostly use MSL and thereby can vary a few 10th of meters
[11:26] <SA6BSS-Mike> . The maximum range of the Geoid99 undulations with respect to the WGS84 ellipsoid is 192 meters
[11:26] <SA6BSS-Mike> The biggest anomaly was discovered southeast of India where the geoid is 105 meters below the ellipsoid, and its highest swelling was observed in eastern Indonesia.
[11:27] <SpacenearUS> New position from 034FSKTEST after 0312 hours silence - 12https://tracker.habhub.org/#!qm=All&q=4FSKTEST
[11:27] <SA6BSS-Mike> so during a flight we might see +/- 50m due to MSL
[11:29] <SA6BSS-Mike> anyway, Leo do you have any insight in the mather of extreme slowdown of difussion when a balloon is at altitude vs at ground level?
[11:30] <LeoBodnar> I have posted my theory - it's mostly because of 70C temperature difference
[11:31] <LeoBodnar> if diffusion is following Arrhenius law then it's roughly a factor of 2^(70/7)=2^10=~1000 times
[11:31] <SA6BSS-Mike> ok, reading up on the data of mylar it seesm to change property yo a more glass like film at -50
[11:31] <LeoBodnar> so day at room temperature is ~3years at -50C
[11:32] <LeoBodnar> but it's probably full of holes
[11:32] <LeoBodnar> ^my theory :D
[11:32] <SA6BSS-Mike> ha, ok!
[11:32] <SA6BSS-Mike> slowdonw of the He molecules at -50,
[11:33] <SA6BSS-Mike> they bounce less often agains the film,
[11:33] <LeoBodnar> and diffusion is sort of dissolving of gas in solids
[11:33] <LeoBodnar> I am making this up as I go along
[11:33] <SA6BSS-Mike> hehe, me to :)
[11:34] <LeoBodnar> pressure difference is x 4-5 but I don't think it can explain drastic changes that we observe
[11:34] <SA6BSS-Mike> indeed but one of many factors probably
[11:36] <LeoBodnar> yeah that's definitely a factor
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[17:01] <SpacenearUS> New vehicle on the map: 03W5MAB-6 - 12https://tracker.habhub.org/#!qm=All&q=W5MAB-6
[17:02] <SpacenearUS> New position from 03DG4NOB-10 after 033 days silence - 12https://tracker.habhub.org/#!qm=All&q=DG4NOB-10
[17:06] <SpacenearUS> New vehicle on the map: 03AIRCOR-1 - 12https://tracker.habhub.org/#!qm=All&q=AIRCOR-1
[17:16] <SpacenearUS> New position from 03NOB8 after 033 days silence - 12https://tracker.habhub.org/#!qm=All&q=NOB8
[17:35] <SpacenearUS> New vehicle on the map: 03KO4DTP-3 - 12https://tracker.habhub.org/#!qm=All&q=KO4DTP-3
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[18:06] <SpacenearUS> New vehicle on the map: 03KM6BWB-4 - 12https://tracker.habhub.org/#!qm=All&q=KM6BWB-4
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[21:13] <ly2en> whoa DG4NOB-10 jumped nicely
[21:15] <SA6BSS-Mike> aprs only, then they will make ocean wide jumps :)
[21:16] <ly2en> allright, fingers crossed for ly1bwb
[21:16] <SA6BSS-Mike> shold start in an hour or so
[21:17] <SA6BSS-Mike> you can ask in habhub to have hysplit on it
[21:17] <ly2en> I have a local university dude who does that for me on a pro level
[21:17] <ly2en> but he's probably asleep at this time
[21:17] <SA6BSS-Mike> its automatic, you jut get aanother button under you payload
[21:18] <ly2en> ah yeah that one
[21:18] <SA6BSS-Mike> supersimple to run it youself in https://www.ready.noaa.gov/hypub-bin/trajtype.pl
[21:18] <LeoBodnar> what's pro level hysplit - I want one too!
[21:18] <SA6BSS-Mike> lol
[21:18] <ly2en> well the dude is an associate professor in hydrometeorology or something
[21:19] <SA6BSS-Mike> I guess he uses noaa tools anyway
[21:19] <ly2en> https://www.researchgate.net/scientific-contributions/Gintautas-Stankunavicius-2025767175
[21:20] <ly2en> I'm checking the plausible launch dates with him and I think he likes making inputs to the mission
[21:21] <ly2en> one of the few who actually ask whether i'm doing another launch or not
[21:21] <LeoBodnar> does anybody know how to merry up isobaric hysplit model with possible downdraft at constant pressure altitude to find a point where the atmospheric sink rate is over balloons ascent rate?
[21:22] <LeoBodnar> in simple terms, can you predict balloon being sucked out of altitude?
[21:22] <SA6BSS-Mike> ly2en: 10 day hysplit for your payload
[21:22] <SA6BSS-Mike> https://www.ready.noaa.gov/hypubout/143271_trj001.gif
[21:22] <ly2en> this Gintautas would be my go-to guy for such questions, lol
[21:22] <ly2en> thanks Mike!
[21:22] <ly2en> tack sa mycket
[21:23] <SA6BSS-Mike> varsågod :)
[21:23] <ly2en> actually Gintautas's inpuyts made the hysplit crash so he uses multiple sources somehow to combine a prediction
[21:23] <ly2en> he mentioned that he's checking at least three sources, but how does one combine multiple src into one - no idea
[21:25] <ly2en> and he's insisting on another launch this Friday night... or Saturday morning
[21:25] <ly2en> but i might not make it
[21:28] <SA6BSS-Mike> if your balloon starts at 23° it will just make it as the max solar angle will be about 23° where it starts today, the noon will be in just over 1 h from now
[21:30] <ly2en> i might just pop a beer to watch the drama
[21:30] <SA6BSS-Mike> a beer is good at any time :)
[21:30] <ly2en> yeah, you don't need a systembolaget :)
[21:31] <SA6BSS-Mike> mine could as earliest go live just over 1 h from now
[21:32] <SA6BSS-Mike> ly2en: is the time 23.30 on your side ?
[21:34] <ly2en> yep
[21:34] <ly2en> EEST
[21:35] <SA6BSS-Mike> rr
[21:41] <SpacenearUS> New position from 03DH3SUP-4FSK after 0316 hours silence - 12https://tracker.habhub.org/#!qm=All&q=DH3SUP-4FSK
[22:07] <SA6BSS-Mike> ly2en: sems the dh3sup comes your way http://predict.habhub.org/#!/uuid=1447adb33cb711e2fabced47956801d54478dbf3
[22:08] <ly2en> yeah seems to go a bit north, but will check tomorrow morning
[22:09] <ly2en> most 144mhz aprs are caught by LY1BWB-2
[22:10] <ly2en> i've also put up a couple of lora aprs rx
[22:10] <ly2en> but so far lora hasn't picked up anything airborne in a month or so
[22:12] <ly2en> Thu-Fri we have a top-down jet stream over the Baltic, 220km/h
[22:27] <ly2en> okay this waiting got me today, have to get some rest
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[22:59] <SpacenearUS> New position from 03BSS41 after 0315 hours silence - 12https://tracker.habhub.org/#!qm=All&q=BSS41
[23:11] <SpacenearUS> New position from 03N4XWC-1 after 0311 hours silence - 12https://tracker.habhub.org/#!qm=All&q=N4XWC-1
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[00:00] --- Wed Nov 17 2021