highaltitude.log.20190217

[00:30] <purewhite[m]> Any thoughts. My antenna wasn't getting the radiosonde signal this morning, until I touched the connector at the SDR. Grounding issue? I didn't tighten anything, and was watching the waterfall and as soon as I touched the plug the signal came in loud and clear. It's a 1/4 wave ground plane antenna
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[02:42] <SpacenearUS> New position from 03KN4IUD-11 after 03a day silence - 12https://tracker.habhub.org/#!qm=All&q=KN4IUD-11
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[04:46] <SpacenearUS> New position from 03BSS18 after 0313 hours silence - 12https://tracker.habhub.org/#!qm=All&q=BSS18
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[05:37] <SpacenearUS> New position from 03SP9UOB after 0314 hours silence - 12https://tracker.habhub.org/#!qm=All&q=SP9UOB
[05:49] <SpacenearUS> New position from 03SP9UOB-P32 after 0314 hours silence - 12https://tracker.habhub.org/#!qm=All&q=SP9UOB-P32
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[08:13] <SpacenearUS> New vehicle on the map: 03VK3FTMC_chase - 12https://tracker.habhub.org/#!qm=All&q=VK3FTMC_chase
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[09:07] <SpacenearUS> New vehicle on the map: 03MUONI1 - 12https://tracker.habhub.org/#!qm=All&q=MUONI1
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[09:17] <Darkside> Viproz: yo
[09:17] <Viproz> hey
[09:18] <Darkside> Viproz: i just used GQRX to get an estimte of the SNR, using the spectrum display
[09:18] <Darkside> then just noted the centre frequency of the sonde, and the rtlsdr gain settings used to acheive that
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[09:19] <Viproz> okay but the issue I have is that I don't have an UI on my pi and gqrx doesn't work on windows
[09:19] <Darkside> sdr sharp will work fine
[09:20] <Darkside> the idea is to just get the best signal possible, then note the gain used
[09:20] <Darkside> then use rtl_sdr to capture the signal with the same settings
[09:21] <Darkside> actually, you could probably just use SDR# to dump some IQ data
[09:21] <Viproz> ok, rtl_sdr on the center frequency then ?
[09:21] <Darkside> though maybe drop the sample rate of the RTLSDR down a bit, so its not a massive file
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[09:21] <Viproz> I would rather use rtl_sdr, the gain settings are different
[09:21] <Darkside> it doesnt relaly matter - all i'm after is a recording with a good SNR
[09:22] <Darkside> doesnt matter how you capture it
[09:22] <Darkside> i can fiddle with it and turn it into a sample suitable for use
[09:22] <Viproz> ok, we can reconvert it to raw afterward with sox I guess ?
[09:22] <Darkside> yeah ill probably write some python to do it
[09:23] <Darkside> working on some stuff to produce a set of samples with known SNRs
[09:23] <Darkside> but the idea is i need a nice high SNR sample to start with
[09:24] <Viproz> okay, I'll try to be quick since I'll be broadcasting my position on a frequency I can't use and I'm kind of on a hill with a weather station nearby :D
[09:25] <Darkside> haha
[09:25] <Darkside> i took off the antenna on the radioosnde when i did it
[09:25] <Darkside> and just put it next to the SDR
[09:25] <Darkside> i need about 2 minutes of samples
[09:26] <Viproz> I can't it's soldered to it and I don't have my soldering iron yet ^^
[09:26] <Darkside> awww
[09:26] <Darkside> sidecutters
[09:26] <Darkside> :P
[09:26] <Darkside> *snip*
[09:26] <Viproz> the only think I have is a knife and a spoon ;)
[09:27] <Darkside> ok that might be more difficult
[09:27] <Viproz> thing*
[09:32] <Darkside> anyway, thanks for doign this :-)
[09:32] <Darkside> the more goood samples we have the easier it will be to develop and test further ugprades
[09:38] <Viproz> My naming of M10 is all wrong ! The M10 I have has a SIERA GPS but sends the same frame as the ones with Trimble GPS, they changed the GPS chip
[09:39] <Darkside> PR time?
[09:39] <Darkside> haha
[09:41] <SpacenearUS> New vehicle on the map: 03MuonKai_chase - 12https://tracker.habhub.org/#!qm=All&q=MuonKai_chase
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[09:41] <Viproz> https://www.sierrawireless.com/products-and-solutions/embedded-solutions/products/xm1110/ it's this chip
[09:44] <Darkside> ahh a mediatek
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[09:48] <Viproz> it's overloading my SDR like crazy
[09:48] <Darkside> wind the gain right back
[09:48] <Darkside> well, as far as you need to anyway
[09:50] <Viproz> good news, it does not have a GPS lock
[09:50] <Darkside> haha
[09:51] <Viproz> well the bad thing is that the time is wrong then
[09:51] <Darkside> doesnt matter
[09:51] <Darkside> we're mainly interested in packet counts
[09:51] <Darkside> that will be the metric that i use for performance testing
[09:51] <Darkside> hence getting abotu 2 minutes of samples, so theres enough packets to be reasonably statistically significant
[09:51] <Darkside> (without the files being stupidly large)
[09:55] <Viproz> It got a lock and started to behave weirdly, skipping frames
[09:59] <SpacenearUS> New vehicle on the map: 03MuonHe_chase - 12https://tracker.habhub.org/#!qm=All&q=MuonHe_chase
[10:00] <SpacenearUS> New vehicle on the map: 03MuonHem_chase - 12https://tracker.habhub.org/#!qm=All&q=MuonHem_chase
[10:01] <Robert_mja> goodmorning, is there some info about what muomi is measuring?
[10:01] <PE2BZ> !dial MUONI2
[10:01] <SpacenearUS> 03PE2BZ: Latest dials for 03Muoni 10(be3c): 03434.652 MHz, 434.5 MHz, 434.073847 MHz, 434.0735 MHz, 434.07361 MHz
[10:01] <PE2BZ> !dial MUONI1
[10:01] <SpacenearUS> 03PE2BZ: Latest dials for 03Muoni 10(be3c): 03434.652 MHz, 434.5 MHz, 434.07361 MHz, 434.073847 MHz, 434.0735 MHz
[10:05] <Viproz> recorded a 2 min sample with S/N of 44 dB
[10:06] <Viproz> I need to check where the center freq is though
[10:09] <Darkside> ok
[10:09] <Darkside> i can probably tweak it if necessary
[10:09] <Viproz> center freq : 401.979.159 Hz
[10:09] <Viproz> S/N : 44 dB
[10:09] <Viproz> RS freq : 401.997.419 Hz
[10:11] <SpacenearUS> New vehicle on the map: 03F1JGP-1 - 12https://tracker.habhub.org/#!qm=All&q=F1JGP-1
[10:12] <PE2BZ> Muoni2 appears to be on 434.525 MHz
[10:12] <Viproz> where do you want me to upload it ?
[10:12] <Darkside> doesnt matter
[10:12] <Darkside> anywhere thats convenient - how big is the file?
[10:14] <Viproz> 58 MB, fairly light I recorded at 250 kHz
[10:15] <Darkside> excellent
[10:15] <Darkside> should be able to make that work nicely
[10:16] <Darkside> so i think we'll use the CSDR flowchain, tweaked up to produce a 'reference' demodulator chain
[10:16] <Darkside> and then we compare other options against that
[10:16] <Darkside> hoping to acheive the same (or better) performance
[10:16] <Darkside> this is because i cant easily break out rtl_fm's FM demodulator to test it
[10:17] <Viproz> sounds good, we can optimize the decoder chain and the demodulator too
[10:17] <Darkside> yup
[10:17] <Darkside> ill write up some python scripts to automate testing
[10:17] <Darkside> and then we can fiddle with the demod parameters
[10:18] <TimMc__> Are rs41 easily damaged with ESD?
[10:18] <Darkside> dunno!
[10:18] <Darkside> the sensor stalk seems to be easily damaged though
[10:18] <Darkside> though mainly with shock
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[10:19] <TimMc__> One landed in dirt / cow stuff. Sensor was rusted 24 hours after landing. Owner of the property took my number and called me back today after noticing the radar reflector
[10:20] <SpacenearUS> New vehicle on the map: 03SQ7JZI_chase - 12https://tracker.habhub.org/#!qm=All&q=SQ7JZI_chase
[10:20] <TimMc__> Inside didn't look water damaged
[10:21] <TimMc__> 4/5 chase successes. 1 was stuck up a tree yesterday.
[10:22] <Darkside> good job!
[10:22] <Darkside> mwheeler has serious competition now :-)
[10:22] <TimMc__> I was thinking of getting some L4820A ferrite beads from Altronics. So much interference when using short extension cables and a usb3 hub.
[10:23] <Viproz> https://drive.google.com/file/d/1woVWNVWKzx0bLh66XJ0wqOFGrGWIoeqF/view?usp=sharing here it is
[10:23] <mwheeler> TimMc__: nice!
[10:25] <mwheeler> Regarding ESD. I've mishandled the crap out of one to try the cold bootstepping attacks and it still mostly works
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[10:26] <TimMc__> sweet :D
[10:26] <TimMc__> Scouring amazon, eBay for some decent usb 2 hub and extension cables for multiple rtlsdr
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[10:36] <Robert_mja> !dial MUONI
[10:37] <SpacenearUS> 03Robert_mja: Latest dials for 03Muoni 10(be3c): 03434.652 MHz, 434.07361 MHz, 434.074 MHz, 434.073834 MHz, 434.0735 MHz, 434.074064 MHz, 1334.348717 MHz
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[10:41] <Darkside> TimMc__: youd be better off extending the RF side than the USB
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[11:05] <PE2BZ> Robert_mja good morning. MUONI2 is (weak) on 434.525 MHz
[11:09] <SpacenearUS> New position from 03MUONI2 after 032 days silence - 12https://tracker.habhub.org/#!qm=All&q=MUONI2
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[11:12] <Robert_mja> pe2bz: Ok, It's going down again, nothing received here in the east of Holland. GPS not in flight mode?
[11:13] <PE2BZ> Could be, I was assuming it floated without the intention to
[11:14] <SpacenearUS> New vehicle on the map: 03BAG08-12 - 12https://tracker.habhub.org/#!qm=All&q=BAG08-12
[11:14] <PE2BZ> Given the low descend rate at this moment I think it has not been above 16 km altitude.
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[11:38] <Robert_mja> I agree with 16 km when looking at the telemetry graph. 16 km gives a line of sight distance of 450km (radio horizon 520km), thats about the distance between me and the balloon. That in combination with a weak signal is no reception here ;-)
[11:58] <SpacenearUS> New vehicle on the map: 03DC2EH-12 - 12https://tracker.habhub.org/#!qm=All&q=DC2EH-12
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[12:08] <SpacenearUS> New vehicle on the map: 03PB0AHX - 12https://tracker.habhub.org/#!qm=All&q=PB0AHX
[12:20] <SpacenearUS> New vehicle on the map: 03DO2EIM-1 - 12https://tracker.habhub.org/#!qm=All&q=DO2EIM-1
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[12:26] <SpacenearUS> New vehicle on the map: 03BAG06-12 - 12https://tracker.habhub.org/#!qm=All&q=BAG06-12
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[13:04] <ha8mz> Hello! :)
[13:04] <ha8mz> I'm new here, and I have an interesting problem with DFM-06 sonde decoding.
[13:05] <ha8mz> I receive signals, all are ok, but the temperature and humidity graph has some jumps, so not linear. I'm using Sonde Monitor
[13:15] <SpacenearUS> New position from 03U3S28 after 032 days silence - 12https://tracker.habhub.org/#!qm=All&q=U3S28
[13:20] <SpacenearUS> New vehicle on the map: 03KC0NML_chase - 12https://tracker.habhub.org/#!qm=All&q=KC0NML_chase
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[13:30] <Viproz> ha8mz, did you take a recording of the signal ?
[13:31] <Viproz> SondeMonitor has an option to use CRC or not, it means that if you leave it unchecked it will display data even if it hasn't been verified as valid
[13:31] <ha8mz> No, but I'm using NFM 15 kHz, and S7-S9 signal, so I don't think it's the radio.
[13:33] <ha8mz> I found it, so checked in the CRC option.
[13:34] <ha8mz> The interesting part is, that the wind and position is correct
[13:35] <Viproz> usually when the signal is good you just have a few corrupted bytes or none so if you have one corrupted at the wrong place it causes problems
[13:36] <ha8mz> https://filestorex.herokuapp.com/file/show?file_id=35&locale=en
[13:36] <ha8mz> The password is: test
[13:36] <ha8mz> Here are GPX saved datas
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[13:48] <YO3ICT> $$SP9UOB-P32,540,190217,134439,0.00000,0.00000,0,0,0,-21,112,254,28,0,UT,0*461E
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[13:58] <SpacenearUS> New vehicle on the map: 03W4fwd_chase - 12https://tracker.habhub.org/#!qm=All&q=W4fwd_chase
[14:12] <SpacenearUS> New position from 03BSS18 after 039 hours silence - 12https://tracker.habhub.org/#!qm=All&q=BSS18
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[14:34] <dfm> sondemonitor decodes dfm06/09 temperature/humidity wrong.
[14:35] <ha8mz> Hmm, I also thought that something is bad with protocol or sth. Do you know better decoder for sound card
[14:35] <ha8mz> ?
[14:36] <dfm> maybe sondemonitor assumes the wrong data format for dfm temperature
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[14:42] <SpacenearUS> New vehicle on the map: 03FMS19_chase - 12https://tracker.habhub.org/#!qm=All&q=FMS19_chase
[14:44] <SpacenearUS> New vehicle on the map: 03WONY-3_chase - 12https://tracker.habhub.org/#!qm=All&q=WONY-3_chase
[14:58] <PE2BZ> ha8mz the decoders from Github (RS ) do decode from default windows audio device when run in CYGWIN. Would that work for you ?
[14:58] <PE2BZ> ha8mz https://github.com/rs1729/RS
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[16:10] <YO3ICT> Anyone figured out how to lower the supply voltage on RS41s to run them on a single battery?
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[16:26] <SpacenearUS> New vehicle on the map: 03Ka0jum_chase - 12https://tracker.habhub.org/#!qm=All&q=Ka0jum_chase
[16:33] <SpacenearUS> New vehicle on the map: 0300002_chase - 12https://tracker.habhub.org/#!qm=All&q=00002_chase
[16:37] <SpacenearUS> New vehicle on the map: 03W0NY-3 - 12https://tracker.habhub.org/#!qm=All&q=W0NY-3
[16:38] <SpacenearUS> New vehicle on the map: 03W0NY-4 - 12https://tracker.habhub.org/#!qm=All&q=W0NY-4
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[16:42] <dfm> However https://github.com/rs1729/RS gives only temperature. And for dfm06/dfm09 the thermistor approximation is only accurate to a certain degree, no calibration.
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[17:31] <WyattDerp> The link to what's the point on this page https://ukhas.org.uk/general:beginners_guide_to_high_altitude_ballooning is broken
[17:31] <WyattDerp> It leads to s site to order custom UK license plates
[17:37] <daveake> wtf lol
[17:39] <daveake> I've removed it. No idea what image that used to be
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[17:54] <SpeedEvil> archive.org
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[18:41] <SpacenearUS> New vehicle on the map: 03oe6pod_chase - 12https://tracker.habhub.org/#!qm=All&q=oe6pod_chase
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[19:32] Nick change: Viproz_ -> Viproz
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[22:54] <SpacenearUS> New vehicle on the map: 03VE6AZX-11 - 12https://tracker.habhub.org/#!qm=All&q=VE6AZX-11
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[23:33] Nick change: BrainDamage_ -> BrainDamage
[00:00] --- Mon Feb 18 2019