highaltitude.log.20210913

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[05:01] <SpacenearUS> New position from 03MIKEL-2 after 036 hours silence - 12https://tracker.habhub.org/#!qm=All&q=MIKEL-2
[05:34] <SpacenearUS> New vehicle on the map: 03TTS39 - 12https://tracker.habhub.org/#!qm=All&q=TTS39
[06:21] <SpacenearUS> New position from 03NOB9 after 03a day silence - 12https://tracker.habhub.org/#!qm=All&q=NOB9
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[08:21] <SpacenearUS> New vehicle on the map: 03SA6BSS-8 - 12https://tracker.habhub.org/#!qm=All&q=SA6BSS-8
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[08:51] <Prutz> any knows what is wrong when I change the station.cfg file? I want to add a frequency to the file with never_scan = 403.2 .. Got a nasty interference here. But when I want to excecute the software it gives me a fault
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[08:59] <Matt|home> i have 2 questions in regards to hot air balloons.. #1 how do you determine the weight capacity a balloon can carry.. is it related to the maximum air temp and balloon size or some other complex stuff? and #2 anyone look into either renewable methods of heat production or some way that doesn't involve burning fuel?
[09:00] <michaela-lgbt> Prutz: can you post the log file and config somewhere so we can investigate ?
[09:00] <michaela-lgbt> (I assume this is regarding radiosonde auto rx)
[09:03] <Matt|home> "A hot air balloon weight limit is usually right around 1000 pounds. This will vary greatly depending on the size of the hot air balloon you are on. It can also vary depending on the weather conditions as well." <-- is this correct ish?
[09:08] <VK5QI> dunno... we work with helium and hydrogen here!
[09:09] <Matt|home> VK5QI : i know helium's lighter than air but can it lift more weight than hot air? i presume so. is it cheaper?
[09:09] <SpacenearUS> New vehicle on the map: 03Ok1jmo_chase - 12https://tracker.habhub.org/#!qm=All&q=Ok1jmo_chase
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[10:21] <LeoBodnar> I'd go for hot Hydrogen
[10:22] <LeoBodnar> "renewable methods of heat production" would be using the Sun - but it's not renewable
[10:32] <SpacenearUS> New vehicle on the map: 03TTS1 - 12https://tracker.habhub.org/#!qm=All&q=TTS1
[10:36] <dfgg> SA6BSS-Mike: in SP we have modified 4fsk software by SP6QKM with 70cm APRS added
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[10:37] <dfgg> some time ago I've explained that in CEE we have kinda good coverage of 432mhz aprs recvs but personally I had to leave this case due to dayjob
[10:38] <dfgg> SA6BSS-Mike: if you want I can connect you with Marek QKM, just leave me some details how to reach you
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[11:27] <SpacenearUS> New position from 03N4XWC-1 after 0310 hours silence - 12https://tracker.habhub.org/#!qm=All&q=N4XWC-1
[11:27] <VK5QI> dfgg: link to said software?
[11:28] <VK5QI> or did someone just hack the aprs transmit back in that ir emoved
[12:40] <SpacenearUS> New position from 03SP6QKM-4FSK after 0318 hours silence - 12https://tracker.habhub.org/#!qm=All&q=SP6QKM-4FSK
[13:03] <Suterusu> I doubt helium or hydrogen can be as cheap as hot air .... Ofc, how you make the air hot can matter in that equasion.
[13:04] <Suterusu> Pretty sure the sun counts as 'renewable' too ...
[13:06] <Suterusu> fo a replenishable method - aside from heat input directly from sunlight - I've considered throwing charge thru a resistor ... possibly getting that charge from a solar panel or mebbe a few peltier effect plates harvesting the temperature differential between the environment and the electronics enclosure ....
[13:06] <Suterusu> Though I was thinking more of using the hot air as ballast to maintain a more fixed hight thru the night
[13:07] <LeoBodnar> exercise 1: what temperature do you need to heat air for it to have the same lifting force as He?
[13:11] <SpacenearUS> New position from 03SP6QKM-12 after 032 days silence - 12https://tracker.habhub.org/#!qm=All&q=SP6QKM-12
[13:11] <Suterusu> it's a density thing ... the lesser dense material floats ... generally, anyway. Not sure o the mass o helium from head but know it's on the tiny end o the scale. Don't think hot air balloons run that hot ... the input temp likely high but once that's levelled off over the area of the balloon I don't imagine it's that great... they build them lil paper lanterns over in asia what float about, don't take much to ignite paper...
[13:12] <LeoBodnar> have you completed Ex1?
[13:13] <Suterusu> I wasn't aware I was sitting a test...
[13:13] <LeoBodnar> nvm then
[13:14] <LeoBodnar> it's over 1500C
[13:15] <Suterusu> Seems a little high to me. Where you come across the maffs on that?
[13:21] <Suterusu> Just see suttin what claimed a gram per liter wit helium ... I build a hot air baloon intended to pick up one gram, I'm pretty sure I'm not gonna need to heat it to 1500°C. Most materials trying to contain it would fail well before then...
[13:22] <Suterusu> Probably need more than a litre o hot air to do it - but deffo wouldn't need 1500°C
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[14:13] <SpacenearUS> New position from 03W8VPV-1 after 0315 hours silence - 12https://tracker.habhub.org/#!qm=All&q=W8VPV-1
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[17:09] <SA6BSS-Mike> dfgg: Tnx for info but for now its fine! Do you have a link to this 4fsk/aprs fw?
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[18:12] <SpacenearUS> New position from 03N0MPM-13 after 0315 hours silence - 12https://tracker.habhub.org/#!qm=All&q=N0MPM-13
[18:23] <SpacenearUS> New vehicle on the map: 03SA6BSS-10 - 12https://tracker.habhub.org/#!qm=All&q=SA6BSS-10
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[19:02] <SpacenearUS> New vehicle on the map: 03DL1SWT_chase - 12https://tracker.habhub.org/#!qm=All&q=DL1SWT_chase
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[20:31] <Prutz> Woohoo for my first sonde!
[20:32] <SpacenearUS> New vehicle on the map: 03TTS40 - 12https://tracker.habhub.org/#!qm=All&q=TTS40
[20:33] <SpacenearUS> New vehicle on the map: 03TTS22 - 12https://tracker.habhub.org/#!qm=All&q=TTS22
[20:37] <SpacenearUS> New vehicle on the map: 03ok2ihp_chase - 12https://tracker.habhub.org/#!qm=All&q=ok2ihp_chase
[20:56] <SpacenearUS> New position from 03icspace26-hab-eu-863-870 after 0320 hours silence - 12https://tracker.habhub.org/#!qm=All&q=icspace26-hab-eu-863-870
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[23:14] <SpacenearUS> New position from 03N4XWC-1 after 0310 hours silence - 12https://tracker.habhub.org/#!qm=All&q=N4XWC-1
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[00:00] --- Tue Sep 14 2021