highaltitude.log.20190305

[00:08] tweetBot1 (~nodebot@philcrump.co.uk) joined #highaltitude.
[00:10] fsphil (fsphil@ursa.sanslogic.co.uk) left irc: Ping timeout: 259 seconds
[00:11] fsphil (fsphil@ursa.sanslogic.co.uk) joined #highaltitude.
[00:11] tweetBot (~nodebot@philcrump.co.uk) left irc: Ping timeout: 245 seconds
[00:27] <SpacenearUS> New vehicle on the map: 03KM4KRH-2 - 12https://tracker.habhub.org/#!qm=All&q=KM4KRH-2
[00:52] mattbrej1a (~mfb2g09@srv02335.soton.ac.uk) left irc: Ping timeout: 252 seconds
[00:52] mattbrejza (~mfb2g09@srv02335.soton.ac.uk) joined #highaltitude.
[00:53] happysat (~katpoep@s5594c83f.adsl.online.nl) left irc: Remote host closed the connection
[00:54] SIbot1 (~nodebot@philcrump.co.uk) joined #highaltitude.
[00:54] SIbot (~nodebot@philcrump.co.uk) left irc: Remote host closed the connection
[01:06] <SpacenearUS> New vehicle on the map: 03VK5PET_chase - 12https://tracker.habhub.org/#!qm=All&q=VK5PET_chase
[01:19] WX4SKY (9bba9013@gateway/web/freenode/ip.155.186.144.19) joined #highaltitude.
[01:19] WX4SKY (9bba9013@gateway/web/freenode/ip.155.186.144.19) left irc: Client Quit
[01:39] happysat (~katpoep@s5594c83f.adsl.online.nl) joined #highaltitude.
[01:46] Hoogvlieger (~Hoogvlieg@541A8CEB.cm-5-3c.dynamic.ziggo.nl) joined #highaltitude.
[01:53] sumie-dh (~sumie-dh@78.108.102.220) left irc: Ping timeout: 250 seconds
[01:57] <SpacenearUS> New vehicle on the map: 03MM4MRH-2 - 12https://tracker.habhub.org/#!qm=All&q=MM4MRH-2
[02:21] GeekShadow (~antoine@reactos/tester/GeekShadow) left irc: Ping timeout: 246 seconds
[02:28] GeekShadow (~antoine@nzf.turmel.info) joined #highaltitude.
[02:28] GeekShadow (~antoine@nzf.turmel.info) left irc: Changing host
[02:28] GeekShadow (~antoine@reactos/tester/GeekShadow) joined #highaltitude.
[02:43] rubdos (~rubdos@2a02:578:859d:701:a846:9858:21a:9451) left irc: Ping timeout: 250 seconds
[02:50] BrainDamage_ (~BrainDama@unaffiliated/braindamage) joined #highaltitude.
[02:51] rubdos (~rubdos@2a02:578:859d:701:a846:9858:21a:9451) joined #highaltitude.
[02:52] BrainDamage (~BrainDama@unaffiliated/braindamage) left irc: Ping timeout: 255 seconds
[02:52] Nick change: BrainDamage_ -> BrainDamage
[03:48] <SpacenearUS> New position from 03YO3ICT after 038 hours silence - 12https://tracker.habhub.org/#!qm=All&q=YO3ICT
[03:55] tweetBot1 (~nodebot@philcrump.co.uk) left irc: Remote host closed the connection
[03:55] tweetBot (~nodebot@philcrump.co.uk) joined #highaltitude.
[05:05] YO9GJX (~YO9GJX@109.100.112.75) left irc: Remote host closed the connection
[06:16] tjq (uid339161@gateway/web/irccloud.com/x-bxquggmzdgzqhkmn) joined #highaltitude.
[06:21] <SA6BSS-Mike> PE2BZ: doing loops with a hab, thats windy for a pico launch! https://www.instagram.com/djmatthias_/p/BumeoSPgLrY/?utm_source=ig_twitter_share&igshid=ysnj09di9da7
[06:24] <SA6BSS-Mike> new commercial aprs tracker comming soon, https://groups.io/g/QRPLabs/topic/lightaprs_tracker/30214058?p=,,,20,0,0,0::recentpostdate%2Fsticky,,,20,2,0,30214058
[06:43] Lahti2 (252183c4@gateway/web/freenode/ip.37.33.131.196) joined #highaltitude.
[06:43] <Ian_> Mustafa Tan :)
[06:45] FireFighter (~firefight@2601:44:4200:ab4f:1165:934b:dc8:144) joined #highaltitude.
[06:54] Viproz (~Viproz@unaffiliated/viproz) joined #highaltitude.
[07:10] sumie-dh (~sumie-dh@78.108.102.220) joined #highaltitude.
[07:14] <SpacenearUS> New position from 03BSS18 after 0314 hours silence - 12https://tracker.habhub.org/#!qm=All&q=BSS18
[07:19] <SpacenearUS> New position from 03TA2MUN-13 after 0317 hours silence - 12https://tracker.habhub.org/#!qm=All&q=TA2MUN-13
[07:28] GeekShadow (~antoine@reactos/tester/GeekShadow) left irc: Ping timeout: 252 seconds
[07:30] GeekShadow (~antoine@nzf.turmel.info) joined #highaltitude.
[07:30] GeekShadow (~antoine@nzf.turmel.info) left irc: Changing host
[07:30] GeekShadow (~antoine@reactos/tester/GeekShadow) joined #highaltitude.
[07:38] lahti (~lahti@87-92-72-134.bb.dnainternet.fi) left irc: Quit: leaving
[07:51] cross_ (~cross@spitfire.i.gajendra.net) left irc: Quit: Lost terminal
[07:56] <SpacenearUS> New position from 03U3B-25 after 0317 hours silence - 12https://tracker.habhub.org/#!qm=All&q=U3B-25
[08:00] Viproz (~Viproz@unaffiliated/viproz) left irc: Ping timeout: 255 seconds
[08:03] TIBS02 (TIBS01@tibs01.plus.com) joined #highaltitude.
[08:04] TIBS01 (TIBS01@tibs01.plus.com) left irc: Ping timeout: 245 seconds
[08:11] Lahti (~Lahti@37-33-131-196.bb.dnainternet.fi) joined #highaltitude.
[09:06] cacoethes (~sms@37.120.159.165) joined #highaltitude.
[09:32] Hoogvlieger (~Hoogvlieg@541A8CEB.cm-5-3c.dynamic.ziggo.nl) left irc: Quit: Leaving
[10:34] Lahti2 (252183c4@gateway/web/freenode/ip.37.33.131.196) left irc: Ping timeout: 256 seconds
[10:36] Lahti (~Lahti@37-33-131-196.bb.dnainternet.fi) left irc: Ping timeout: 245 seconds
[10:49] Lahti (~Lahti@213-216-253-39.bb.dnainternet.fi) joined #highaltitude.
[11:16] kakoethes (~sms@89.238.132.37) joined #highaltitude.
[11:19] cacoethes (~sms@37.120.159.165) left irc: Ping timeout: 245 seconds
[11:19] cacoethes (~sms@89.238.132.37) joined #highaltitude.
[11:21] kakoethes (~sms@89.238.132.37) left irc: Ping timeout: 245 seconds
[11:48] chris_99 (uid26561@gateway/web/irccloud.com/x-cvhhujxpaagihjiq) joined #highaltitude.
[11:55] cacoethes (~sms@89.238.132.37) left irc: Ping timeout: 255 seconds
[12:18] Ruben_ (d56207a5@gateway/web/freenode/ip.213.98.7.165) joined #highaltitude.
[12:20] <Ruben_> Hello friends: Radiosonde_auto_rx decoding fine my local M10. I have a little question now: How can we log Pressure, %Hum, etc info ?
[12:24] <Darkside> it must be a different format to the M10 then
[12:24] <Darkside> which makes figuring out the format a lot more painful
[12:26] dustinm`_ (~dustinm@68.ip-149-56-14.net) left irc: Quit: Leaving
[12:31] dustinm` (~dustinm@68.ip-149-56-14.net) joined #highaltitude.
[12:33] <Ruben_> we are logging this correctly with sonde_monitor at this momment
[12:34] <Ruben_> http://casa.meteoelche.es:8089/
[12:37] Ruben_ (d56207a5@gateway/web/freenode/ip.213.98.7.165) left irc: Quit: Page closed
[12:42] <Darkside> ohh, he wants pressure and humidiy
[12:42] <Darkside> it already does temp
[12:42] <Darkside> too hard basket
[13:04] <TimMc_> R0220242 burst at 24k above Bunyip bushfire
[13:08] Ruben_ (5478ac8b@gateway/web/freenode/ip.84.120.172.139) joined #highaltitude.
[13:10] <Ruben_> Darkside: I lost internet connection. I don't know if you wrote me about logging more info from sondes.
[13:17] <craag> Ruben_: fyi you can use the channels logs here: http://habhub.org/zeusbot/
[13:19] <Ruben_> channels logs? What does it mean?
[13:21] <craag> It's a log of everything written in the channel, useful to see messages you've missed if you're disconnected :)
[13:22] <Ruben_> Thank's
[13:23] <Ruben_> Darkside: Yes... i need Pressure and humidity.
[13:23] <Ruben_> i don't know if speed is also possible.
[13:35] <SpacenearUS> New vehicle on the map: 03K1AMO - 12https://tracker.habhub.org/#!qm=All&q=K1AMO
[13:37] cacoethes (~sms@89.238.132.37) joined #highaltitude.
[13:38] <SpacenearUS> New vehicle on the map: 03FHSUchase - 12https://tracker.habhub.org/#!qm=All&q=FHSUchase
[13:39] <SpacenearUS> New vehicle on the map: 03n8vrn_chase - 12https://tracker.habhub.org/#!qm=All&q=n8vrn_chase
[13:39] Sirius-BE (~BeB@8-117-44-5.dyn.ftth.fcom.ch) left irc: Remote host closed the connection
[13:50] SA6BSS-9 (~SA6BSS-Mi@h-155-4-222-217.NA.cust.bahnhof.se) joined #highaltitude.
[13:51] <Ruben_> I think Wind Speed and direction is also reported by M10 sondes. Having all this info is very important for us.
[13:53] SA6BSS-Mike (~SA6BSS-Mi@h-155-4-222-217.NA.cust.bahnhof.se) left irc: Ping timeout: 245 seconds
[14:07] <SpacenearUS> New vehicle on the map: 03SH07 - 12https://tracker.habhub.org/#!qm=All&q=SH07
[14:12] <SpacenearUS> New vehicle on the map: 03SH05 - 12https://tracker.habhub.org/#!qm=All&q=SH05
[14:15] <SpacenearUS> New vehicle on the map: 03stm32_polm - 12https://tracker.habhub.org/#!qm=All&q=stm32_polm
[14:20] Sirius-BE (~BeB@8-117-44-5.dyn.ftth.fcom.ch) joined #highaltitude.
[14:26] labjg_ (~labjg@150.203.88.49) left irc: Read error: Connection reset by peer
[14:26] labjg_ (~labjg@150.203.88.49) joined #highaltitude.
[14:28] cacoethes (~sms@89.238.132.37) left irc: Ping timeout: 245 seconds
[14:33] happysat (~katpoep@s5594c83f.adsl.online.nl) left irc: Quit: Hunger-the-inner-diva
[14:33] cross (~cross@spitfire.i.gajendra.net) joined #highaltitude.
[14:37] happysat (~katpoep@s5594c83f.adsl.online.nl) joined #highaltitude.
[14:40] Laurenceb (~laurence@cca100-pool11.nottingham.ac.uk) joined #highaltitude.
[15:32] OZ1SKY_Brian (~Brian@2-104-129-194-cable.dk.customer.tdc.net) joined #highaltitude.
[15:35] YO9GJX (~YO9GJX@109.100.112.75) joined #highaltitude.
[15:35] tjq (uid339161@gateway/web/irccloud.com/x-bxquggmzdgzqhkmn) left irc: Quit: Connection closed for inactivity
[15:47] dfm (59cc9b08@gateway/web/freenode/ip.89.204.155.8) joined #highaltitude.
[15:50] <dfm> Ruben, what do you by "speed"? The velocity of the radiosonde? It is part of the GPS data, horizontal/vertical speed and heading.
[15:51] <dfm> M10 does not have a pressure sensor. Pressure is then calculate using GPS altitude and other sensor data (humidity/temperature)
[16:00] <dfm> Some radiosondes calculate PTU (pressure/temperature/rel.humidity) on board, e.g. imet1rs and the dropsonde RD94. But usually they transmit only the raw data.
[16:04] <dfm> This is because the temperature or humidity does not come from a chip, it is some kind of capacity or voltage measurement at the sensors.
[16:08] <dfm> If you know the sensor and how it behaves at very low temperature or relative humdity or both, you can derive the temperature or relative humidity.
[16:10] <dfm> To get accurate values you would need calibration data. And then it might be even necessary to correct for other errors.
[16:14] <dfm> Temperature is rather easy, usually a thermistor or platinum resistance thermometer is used.
[16:18] <dfm> Humidity is not so easy, in particular at high altitudes. You can find radiosonde comparisons and see, that they don't measure always the same. So with raw data you could still correct your calculations when you discover, that you missed something.
[16:23] <dfm> At low temperatures you might have to consider the response time of the r.h. sensor.
[16:25] <dfm> For M10 you can find the humidity sensor manufacturer (UPSI), the frequency/capacitance raw data is calculated in the decoder, so you can derive the humidity. Maybe you have to ask the hum-sensor manufacturer, how the sensor behaves at very low temperatures.
[16:25] <dfm> And compare to published soundings.
[16:26] <dfm> Or ask someone who already did this, but then you don't lern much, you could just look at the official sounding data.
[16:27] dfm (59cc9b08@gateway/web/freenode/ip.89.204.155.8) left irc:
[16:31] TIBS01 (~TIBS01@tibs01.plus.com) joined #highaltitude.
[16:32] TIBS02 (TIBS01@tibs01.plus.com) left irc: Ping timeout: 240 seconds
[16:47] OZ7EMA (~emanuel_@151.36.248.218) joined #highaltitude.
[16:49] Viproz (~Viproz@unaffiliated/viproz) joined #highaltitude.
[16:57] hyde00001 (~hyde00001@cpc69050-oxfd25-2-0-cust745.4-3.cable.virginm.net) joined #highaltitude.
[17:02] <hyde00001> I note that a tweetbot logs in and out from time to time... I'm hoping to conjure up/use an existing service that can parse a tweet to a specific @ or hashtag which then posts the message in here (or indeed another irc chat room). Does anyone know if the existing tweetbot does that. If so, how to use ??
[17:08] <daveake> craag is your man. I think it simply copies over anything that mentions #ukhas
[17:10] <tweetBot> @daveake: testy test test #ukhas
[17:10] <daveake> woo
[17:12] <tweetBot> @MASAEngineering: So it does! I was thinking it would be #highaltitide..., but that didn't work... #ukhas
[17:20] <craag> hyde00001: https://pastebin.com/R5S3dhai
[17:20] <craag> it logs out and back in because I have to kick out else it seems to 'go deaf'
[17:20] <craag> honestly I'd look for a better way
[17:21] <craag> it was quick 20 minutes hackjob that I haven't got around to redoing
[17:21] <hyde00001> simple, effective, not broken. Fix not required!
[17:21] chandroid (~chandroid@bsn113.neoplus.adsl.tpnet.pl) left irc: Ping timeout: 268 seconds
[17:22] chandroid (~chandroid@boc165.neoplus.adsl.tpnet.pl) joined #highaltitude.
[17:33] OZ7EMA (~emanuel_@151.36.248.218) left irc: Quit: My MacBook has gone to sleep. ZZZzzz&
[17:45] <Viproz> Darkside, Hey, Ruben_ posted on the issue about logging more than what we're logging right now, we discussed a bit a long time ago about saving the json directly instead of converting it, do you know if anyone is using the log files right now to do something ?
[17:46] <Viproz> If there are apps parsing the data already it might be problematic but otherwise I would say it's better to save more data in a better format (json)
[17:53] hyde00001 (~hyde00001@cpc69050-oxfd25-2-0-cust745.4-3.cable.virginm.net) left irc: Ping timeout: 240 seconds
[17:54] <Ruben_> dfm: A lot of thank's for the info.
[18:04] <Ruben_> Viproz: I am ham radio but also i am lover of meteorology. Pressure, Humid, Temp, High, Wind Speed and direction, etc... al these values are important for us. I don't know how Sonde Monitor extracts them from M10 sondes but we have all this information using this software. We want migrate the rx sistem to raspberry.
[18:07] tjq (uid339161@gateway/web/irccloud.com/x-vmmfbwerljspjrrm) joined #highaltitude.
[18:07] <Viproz> as dfm said the humidity is not all that simple and the pressure comes from the altitude but the rest are calculated
[18:07] <Viproz> { "sub_type": "Trimble", "frame": 1548200892, "id": "M10-T-607-2-14087", "dxlid": "ME100079", "datetime": "2019-01-22T23:48:12Z", "satelites": 9, "lat": 37.57155, "lon": -0.95397, "alt": 8888.36, "vel_h": 50.13942, "heading": 170.69736, "vel_v": 0.90, "temp": -47.0, "battery": 5.26, "crc": 1 }
[18:11] <Ruben_> I understand.
[18:13] <Viproz> Ruben_, The wind velocity is quite noisy since they're just using the sonde velocity, you have some oscillation sometimes
[18:32] Viproz (~Viproz@unaffiliated/viproz) left irc: Ping timeout: 240 seconds
[18:33] OZ7EMA (~emanuel_@151.36.248.218) joined #highaltitude.
[18:39] FireFighter (~firefight@2601:44:4200:ab4f:1165:934b:dc8:144) left irc: Remote host closed the connection
[18:46] drsnik (~drsnik@gate3.ima.cz) left irc: Ping timeout: 245 seconds
[18:55] drsnik (~drsnik@gate3.ima.cz) joined #highaltitude.
[19:00] drsnik_ (~drsnik@gate3.ima.cz) joined #highaltitude.
[19:01] m6olz (520b4ab1@gateway/web/freenode/ip.82.11.74.177) joined #highaltitude.
[19:03] <m6olz> All RS41 sondes is detected like -M10 when i start to receive them and the signal is not strong......this happen after 20181227 update when M10 is added
[19:03] drsnik (~drsnik@gate3.ima.cz) left irc: Ping timeout: 255 seconds
[19:17] SA6BSS-9 (~SA6BSS-Mi@h-155-4-222-217.NA.cust.bahnhof.se) left irc: Quit: KVIrc 5.0.0 Aria http://www.kvirc.net/
[19:17] SA6BSS-Mike (~SA6BSS-Mi@h-155-4-222-217.NA.cust.bahnhof.se) joined #highaltitude.
[19:17] <SA6BSS-Mike> Got the msi.sdr today, it identifies and beahaves like a rsp1 with 10khz-2Ghz range using the rsp1 dlland 10Mhz bw, some pic here https://imgur.com/a/nWwdyEC
[19:27] <m6olz> Radiosonde_auto_rx not support MSi001 and Msi2500 chips.....it will be fantastic if we can use RSP1a instead of RTL SDR
[19:28] <SA6BSS-Mike> no, thats not a good ide,
[19:28] <SA6BSS-Mike> its terrible in the 400Mhz span
[19:29] <SA6BSS-Mike> read the spec of the msi ship, and how rps folks made a workaround to make it work kind of, but my rtl is MUCH better
[19:30] <SA6BSS-Mike> if your after bw and good sensetivity go for the airspy mini
[19:31] <SA6BSS-Mike> and make that compatible with sonde_rx
[19:31] <SA6BSS-Mike> I guess that might be on the todo list of the creators
[19:33] <SpacenearUS> New vehicle on the map: 03CALLSIGN123_chase - 12https://tracker.habhub.org/#!qm=All&q=CALLSIGN123_chase
[19:41] OZ7EMA (~emanuel_@151.36.248.218) left irc: Read error: Connection reset by peer
[19:46] <PE2BZ> SA6BSS-Mike indeed I never succeeded Sonde RX with the RSP1. The RSP1a however does a great job for that. It has something to do with the local oscillator setting and band converting in the rsp1. But for HF the RSP1 without A worked great, and also for 433 MHz and up
[20:09] <m6olz> Yes please add Airspy mini to supported dongles
[20:12] michal_f_home (~mfratczak@91-145-163-242.internetia.net.pl) joined #highaltitude.
[20:12] Lahti (~Lahti@213-216-253-39.bb.dnainternet.fi) left irc: Quit: Lähdössä
[20:17] dfm (59cc9a95@gateway/web/freenode/ip.89.204.154.149) joined #highaltitude.
[20:22] <dfm> If the radiosonde is hanging 30m below the balloon, it can swing back and forth like a pendulum, sometimes in circles. With 1 sec resolution you often see this kind of movement.
[20:22] dfm (59cc9a95@gateway/web/freenode/ip.89.204.154.149) left irc:
[20:23] dfm (59cc9a95@gateway/web/freenode/ip.89.204.154.149) joined #highaltitude.
[20:26] <dfm> though i have a rough estimate for humidity, but it is not so accurate, and when i have time i would like to do some more work on this matter. however there are more interesting things to do right now, so it will have to wait.
[20:26] dfm (59cc9a95@gateway/web/freenode/ip.89.204.154.149) left irc: Client Quit
[20:39] Viproz (~Viproz@unaffiliated/viproz) joined #highaltitude.
[20:41] zabow (~zab@host163-82-dynamic.46-79-r.retail.telecomitalia.it) left irc: Quit: Leaving
[20:47] tjq (uid339161@gateway/web/irccloud.com/x-vmmfbwerljspjrrm) left irc: Quit: Connection closed for inactivity
[20:47] tjq (uid339161@gateway/web/irccloud.com/x-wwxhxszyzyktxhkj) joined #highaltitude.
[20:54] <Ruben_> dfm: A lot of thank's
[21:07] <SA6BSS-Mike> PE2BZ: ok about the rsp1a, I will try that tomorrow, just tested the rsp2 and first gen, and they sucked :)
[21:16] <Ruben_> The best is Airspy. R2 if you need external clock or Mini for standard use.
[21:20] chris_99 (uid26561@gateway/web/irccloud.com/x-cvhhujxpaagihjiq) left irc:
[21:23] <Viproz> m6olz, it's being worked on, dfm fixed the problems and Darkside is implementing it, it's already fixed in the testing branch
[21:24] <Darkside> i have no intention of supporting the Rsp1a
[21:25] <Darkside> M10 detection think is fixed
[21:25] <Darkside> SDRPlay and their binary-only driver can bugger off
[21:26] <Darkside> put a preamp and a filter in front of a rtlsdr and it'll work just fine
[21:26] <Darkside> airspy mini has the same frontend as the RTLSDR v3, so it'll have exactly the same noise figure performance and intermod performance
[21:27] <Darkside> you do get a bit of extra dynamic range out of the airspy which *may* help in specific cases
[21:27] <Viproz> Oh the detection fix is already in main ?
[21:27] <Darkside> h nope
[21:27] <Darkside> oh no
[21:27] <Darkside> not yet
[21:27] <SA6BSS-Mike> love my rsp:s but not for sonde hunting, ther Im using a v3
[21:27] <Darkside> still in testing
[21:27] <Darkside> Viproz: i think we should be able to merge it into master pretty soon though
[21:29] <Viproz> I didn't really follow unfortunately, the testing branch is using csdr right now ?
[21:29] <Darkside> nope
[21:29] <Darkside> testing is using rtl_fm still
[21:29] <Darkside> the performance is actually pretty good, if you use the right settings
[21:29] <Viproz> ok good, easier to update for people
[21:30] <Darkside> i have an experimental branch where i'm playing around with different decode chains
[21:30] <Darkside> though thats only in my own fork
[21:31] <m6olz> Darkside:what is the right settings? You can adjust only the gain
[21:32] <Darkside> you can thank the developers of the rtl-sdr lib for that fun one
[21:32] <Darkside> and what the right settings are will depend entirely on your setup
[21:32] <Darkside> i suggest observing a radiosonde in-flight with something like gqrx or something else, and tweaking the gain for maximum SNR
[21:33] BrainDamage_ (~BrainDama@unaffiliated/braindamage) joined #highaltitude.
[21:33] <Viproz> In testing we're using a signal that is decimated a lot more than what rtl_fm is normally using, have you been able to test a bit to compare to when it's less decimated ? it shouldn't be worse I don't think, if it is it's messed up
[21:34] <Darkside> yeah im pretty sure its OK
[21:34] <Darkside> i did some twiddling around with higher oversampling numbers
[21:34] <m6olz> Is it the same gain setting if i use sdr# and then write the same gain into radiosonde_rx
[21:34] <Darkside> m6olz: not sure if SDR% gives more control over the different gain params
[21:34] <Darkside> but you can try
[21:35] <Darkside> what is your antenna setup?
[21:35] <Darkside> and are you using a preamp
[21:35] BrainDamage (~BrainDama@unaffiliated/braindamage) left irc: Ping timeout: 250 seconds
[21:35] Nick change: BrainDamage_ -> BrainDamage
[21:35] <m6olz> I mean if use sdr# and find that to say 44.5db gain is good to write the same into radiosonde_rx
[21:36] <Darkside> sure
[21:36] <m6olz> I use SIRIO CX395 tetra antenna with resonant 402.5Mhz
[21:36] <m6olz> RTL SDR v3
[21:36] <m6olz> 10m coax
[21:36] <m6olz> no LNA
[21:36] <Darkside> ok
[21:36] <m6olz> I have UPU LNA but it come worst with preamp
[21:36] <Darkside> in that case yes, maybe 30-40 db gain is probably ok
[21:37] <Darkside> if you use a LNA, wind the SDR gain back to maybe 25 db
[21:37] <m6olz> I can not find the correct gain for preamp setup
[21:37] <Darkside> else you will jusst overload it
[21:38] <Darkside> i have a preamp on my setup, and i had to wind the gain back to 26 dB else i would overload the sdr
[21:38] <m6olz> now i set it 44.5db gain and look ok for now but will try 40.2db
[21:39] <m6olz> what LNA you use
[21:39] <m6olz> filtered?
[21:39] <Darkside> well i have a fiter in front of the LNA, but the LNA itsef is the same MMIC thats in Upu's LNAs
[21:40] <m6olz> But UPU LNA saw filter is after lna chip
[21:40] <Viproz> homemade ?
[21:40] <Darkside> m6olz: to maintain noise figure that is the right way to do it
[21:41] <Darkside> in my case I am preparing to put my receive station up at a radio repeater site, and so i need the bandpass filtering right at the front
[21:41] <m6olz> but......i never fit lna next to antenna
[21:41] <Darkside> Viproz: its actually a very very early habamp design
[21:41] <m6olz> aways test it next to my raspberry
[21:41] <Darkside> m6olz: what coax are you running to th eantenna?
[21:41] <m6olz> i know that need to be next to antenna
[21:42] <m6olz> MESSI & PAOLONI ULTRAFLEX 7
[21:42] <Darkside> oh thats good stuff
[21:42] <Darkside> putting the preamp next to the antenna might lower the system noise figure by a db ot two
[21:42] <m6olz> yes good coax
[21:42] <Darkside> but you should still get an improvement with it where it is
[21:43] <Darkside> but yes, you will need to lower your rtlsdr gain a lot
[21:43] <m6olz> i try different gain setting and still better with no lna
[21:43] <Darkside> how are you judging 'better' though?
[21:43] <m6olz> not that huge improvements
[21:44] <m6olz> i compare how far and low i follow the sonde
[21:44] <Darkside> oh
[21:44] <Darkside> yeah thats not a good way of comparing tbh
[21:44] <Darkside> once a radiosonde is in the air, the SNR is usually very high
[21:44] <Darkside> and your limitation is often just line of sight
[21:45] <Darkside> where the preamp can help is detecting radiosonces that are *very* far away, though still within line of sight, or sometimes decoding them just that little bit lower
[21:46] <m6olz> that is way the improvements is not visible
[21:47] <m6olz> but i never go to chase the radiosonde more than 60km from home si this setup now is ok
[21:49] <m6olz> there must be same tools in this image to set the proper gain because now try gain value and wait to see how it will detect the probe
[21:50] <Darkside> what you ask is very difficult without having test equipment to produce calibrated signal levels
[21:50] <Darkside> sorry
[21:50] <m6olz> i know
[21:50] <m6olz> just dream
[21:50] <m6olz> :)
[21:52] <m6olz> I also have Nooelec SMART sdr but rtl v3 is better in range detecting with the same gain setting
[21:52] <Darkside> well there will be some significant detection improvements coming up
[21:53] <m6olz> glad to hear that :)
[21:53] <m6olz> thank you
[21:56] <Viproz> Darkside, uputronics designs look very good but 70¬ delivered seems way too expensive to me
[21:56] <Darkside> small manufacturing quantities and all that..
[21:56] <Darkside> specialist use-case
[21:57] <Viproz> yeah the case is probably really expensive to make, cast or fab
[21:57] <Darkside> nah
[21:57] <Darkside> i mean the usecase of the amplifier
[21:57] <Darkside> the SAW filter itself is probably not that cheap
[21:57] <Viproz> it's probably standard extruded aluminium cut to length actually
[21:57] <Darkside> the case is probably a few pounds i guess
[21:58] <Darkside> Viproz: could you make sure you'e on the latest testing branch
[21:58] <Darkside> and just check you have no issues with M10s
[21:59] <Viproz> I really can't decode with my setup, I have a long cable eating all of the signal and my antenna is hot high enough so I'm not getting anything
[21:59] <Darkside> ahh :-(
[21:59] <Viproz> I need to be standing on my railing to decode a m10 x)
[21:59] <Darkside> ideally i want someone running with the testing branch in an area that can see M10s, and an area that can see DFMs
[21:59] <Darkside> just to be sure theres no other issues
[21:59] <Darkside> im pretty sure its fine
[22:00] <Viproz> I'll send a mail to F5MVO, near Paris, just need to do "git checkout testing" build and go right ?
[22:00] <SA6BSS-Mike> use one of these, quite sheap, works from about 350Mhz and up over 1100Mhz (I used to have one of these doing adsb) https://www.ebay.com/itm/Triax-UHF-Mast-Amplifier-12-dB-470-862-MHz-T340012/292746267994?epid=1331340416&hash=item4429098d5a:g:41kAAOSwAOxbrJlo
[22:00] <Darkside> yeah that should do ok
[22:00] <Viproz> git pull*
[22:01] <Darkside> git pull, git checkout testing, then re-do the build
[22:02] <Darkside> ok gtg
[22:03] <Viproz> SA6BSS-Mike, I was wondering if ebay stuff was any good, you used a filter after this too ?
[22:03] <SA6BSS-Mike> nop
[22:03] <Darkside> the filter is more about getting rid of out-of-band signals
[22:03] <Darkside> if you dont have any strong local signals, then you could possibly get away without it
[22:03] <SA6BSS-Mike> if you live close to cell tower tv/FM transmitters it might be good to have
[22:04] <Darkside> around here, we have a government radio network on 410-420 MHz, and it is *string*
[22:04] <Darkside> strong*
[22:04] <Darkside> lol
[22:04] <Darkside> so a filter helps
[22:04] <SA6BSS-Mike> :) ok
[22:04] <Darkside> my station which is going to a repeater site has a 4 mhz wide interdigital filter in front of it
[22:04] <Darkside> 399-403 MHz, transition bandwidth is like 200 khz, and the stopband attenuation is > 90 dB
[22:04] <Viproz> I live in a city, I have a whole lot of signals everywhere, big FM stations and everything :D
[22:05] <SA6BSS-Mike> ok, then a filter might help, I live in a small vilage with the clsoest tv fm (multi KW stations 40km away)
[22:06] <SA6BSS-Mike> I dont notice any degradation but all qth:S differ
[22:06] <Viproz> hum, can't find one with SMA connectors
[22:07] <SA6BSS-Mike> no its made for mounting directly on to the tv antenna
[22:07] <SA6BSS-Mike> so you gonna need some adpater,
[22:07] <m6olz> https://www.crtfrance.com/en/bases/762-cx-395-sirio.html?search_query=cx+395&results=5
[22:07] <SA6BSS-Mike> therre is one with sma... hang on lets see if I can find it ...bullet something
[22:07] <m6olz> this is my antenna
[22:08] <SA6BSS-Mike> https://www.ebay.com/itm/Bullet-SUPER-MINI-IN-LINE-SIGNAL-AMPLIFIER-Signal-Booster-for-Freeview-Aerials/151603854542?hash=item234c4b3cce:g:Kj0AAOSwNSxU8JWW:rk:20:pf:0
[22:08] <SA6BSS-Mike> sory, f- connector...searcing :)
[22:09] <m6olz> wow 3db noise factor
[22:09] <m6olz> too high
[22:09] <m6olz> UPU lna is 0.75db noise
[22:09] <SA6BSS-Mike> tv tx is strong :)
[22:09] <SA6BSS-Mike> well ther is loads on ali
[22:09] <russss> aliexpress is full of cheap and decent LNAs now
[22:10] BrainDamage_ (~BrainDama@unaffiliated/braindamage) joined #highaltitude.
[22:10] <Viproz> and it's not the same price ^^
[22:10] <Viproz> russss, what's the criteria to know it's not crap ?
[22:10] <m6olz> It is not good to have wideband lna without filter
[22:11] <russss> Viproz: some of them have authentic looking measurements attached but they're cheap enough to buy it and see tbh
[22:11] <russss> as for filters, you can always DIY
[22:11] <m6olz> easy to overload with wideband lna
[22:11] BrainDamage (~BrainDama@unaffiliated/braindamage) left irc: Ping timeout: 252 seconds
[22:11] Nick change: BrainDamage_ -> BrainDamage
[22:13] <Viproz> yeah I have a collection of capacitor surfacemount now and stuff to make a copper box so I should be able to make something
[22:13] <SA6BSS-Mike> made a lot of homebrew lnas with about every mmic s out ther, did not notice any particular difference between them https://imgur.com/a/1w4OMV1
[22:15] <Viproz> https://www.aliexpress.com/item/Bias-Tee-Wideband-10-6000-MHz-6GHz-for-HAM-radio-RTL-SDR-LNA-Low-Noise-Ham/32950517760.html?spm=2114.search0104.3.2.154b1dfeZ4Fekp&ws_ab_test=searchweb0_0,searchweb201602_4_10065_10068_319_10892_317_10696_10084_453_454_10083_10618_10304_10307_10820_10821_537_10302_536_10902_10843_10059_10884_10887_321_322_10103,searchweb201603_60,ppcSwitch_0&algo_expid=d99f6e04-a26c-4802-ac4c-f4901033216f-0&algo_pvid=d99f6e04-a26c
[22:15] <Viproz> -4802-ac4c-f4901033216f This feels like they forgot to put the chip on the board :p
[22:15] <SA6BSS-Mike> its bias t
[22:15] <SA6BSS-Mike> just a power inserter
[22:15] <SA6BSS-Mike> I guess you know what it is
[22:16] <russss> yeah it seems like modern wideband MMIC amps are all pretty good
[22:16] <Viproz> yeah my SDR supports it, does it simplify the design ?
[22:16] <SA6BSS-Mike> then you dont need it
[22:17] <Viproz> oh right, I didn't read the title, "for LNA"
[22:17] fl_0 (~fl_0@unaffiliated/fl-0/x-7355575) left irc: Quit: STRG + Q
[22:23] <Viproz> There is someting I don't quite understand, https://www.aliexpress.com/item/50M-4GHz-Low-Noise-Amplifier-LNA-Ham-Radio-Module-RF-FM-HF-VHF-NF-0-6dB/32887062920.html like for this one, it looks quite ok but what's the thing comming out ? at first I thought it was the cable to power it coming out but it doesn't look like it on the pictures ?
[22:24] <russss> yeah that's the power
[22:25] <russss> it's on a feedthrough capacitor which is common for such metal enclosures.
[22:25] <Viproz> they never talk about bias-T in there, there is a way to make them support it ?
[22:26] <SpacenearUS> New position from 03BSS18 after 037 hours silence - 12https://tracker.habhub.org/#!qm=All&q=BSS18
[22:27] <russss> you can always just put another bias-t circuit in "backwards" before it to extract the bias voltage
[22:28] <Viproz> right
[22:29] <Viproz> Well thanks for all the opinions, I gotta go, but I'll check the logs tomorrow
[22:29] <russss> orrr you can probably crack it open and just bridge the DC block capacitor, it's interesting that they all have their own biasing circuits
[22:30] <Viproz> better buy two of them then :p
[22:31] <russss> it almost certainly has an internal bias-T to power the amp anyway
[22:32] <Viproz> SA6BSS-Mike, would you say it's worth it to do your own with the chips ?
[22:32] <Viproz> I'm not really setup to do PCB right now but I think I have a place to make them
[22:33] <SA6BSS-Mike> nahh, they are to cheap to bother homebrewing, hard to weatherproof them
[22:33] <russss> also the metal case is probably worth having
[22:33] <SA6BSS-Mike> it was fun trying and mostly it was my first tryouts with eagle pcb
[22:36] <Viproz> okay I'll just buy two and go from there, cheers
[22:41] Viproz (~Viproz@unaffiliated/viproz) left irc: Ping timeout: 240 seconds
[22:41] <happysat> following dfm-09 with auto-rx test branch
[22:41] <happysat> looks good
[22:42] <happysat> early burst @ 9km
[22:50] <happysat> im loosing signal now&then
[22:50] <happysat> 2019-03-05 23:48:55,468 INFO:Telemetry Logger - Closed log file for DFM09-18060075
[22:50] <happysat> 2019-03-05 23:49:07,697 WARNING:Payload ID DFMxx-xxxxxxxx is invalid. Note: DFM sondes may take a while to get an ID.
[22:51] <happysat> log close fast
[22:51] <happysat> no new position bc id-ing
[22:51] TheGuv (~yaaic@a85-138-211-60.cpe.netcabo.pt) joined #highaltitude.
[22:51] <happysat> and that takes a while 0-o
[22:57] tjq (uid339161@gateway/web/irccloud.com/x-wwxhxszyzyktxhkj) left irc: Quit: Connection closed for inactivity
[23:12] m6olz (520b4ab1@gateway/web/freenode/ip.82.11.74.177) left irc: Quit: Page closed
[23:21] sumie-dh (~sumie-dh@78.108.102.220) left irc: Ping timeout: 246 seconds
[23:21] OZ1SKY_Brian (~Brian@2-104-129-194-cable.dk.customer.tdc.net) left irc: Quit: Please pause the radiowaves !
[23:39] chandroid (~chandroid@boc165.neoplus.adsl.tpnet.pl) left irc: Ping timeout: 255 seconds
[23:39] chandroid (~chandroid@bvr14.neoplus.adsl.tpnet.pl) joined #highaltitude.
[00:00] --- Wed Mar 6 2019