Possible Radiosonde? help

Get help identifying an unknown signal.
Post Reply
HobbyMan
Posts: 38
Joined: Sat Apr 07, 2018 1:55 am

Possible Radiosonde? help

Post by HobbyMan » Tue May 08, 2018 12:51 am

I have been getting this signal @401.011 MHZ and i dont know what it is. i am looking for an iMet radiosonde that i can track and this doesnt look like iMet, the bandwidth is way to small (~10 khz). I only check at around 6 AM and 6 PM and it seems that it occurs shortly after both times, which makes me think that its an NOAA radiosonde. I have an LNA and FM bandstop filter on order, so when that arrives i will do a better signal analysis.

I have included a picture and a recording
SDR#.png
SDR#.png (338.55 KiB) Viewed 1235 times
...

NFM audio

ill include I/Q recordings when i can, im on a tight schedule.

rtlsdrblog
Site Admin
Posts: 1826
Joined: Mon Nov 19, 2012 11:54 pm

Re: Possible Radiosonde? help

Post by rtlsdrblog » Tue May 08, 2018 5:49 am

It does sound like a radiosonde, but unsure on exactly which one. Maybe RS92-SGP. https://www.sigidwiki.com/wiki/Vaisala_ ... adiosonde)

For the screenshots i'd recommend increasing your range setting in SDR#. You've made it so that the waterfall is very dark and so the signal can't be seen clearly.

HobbyMan
Posts: 38
Joined: Sat Apr 07, 2018 1:55 am

Re: Possible Radiosonde? help

Post by HobbyMan » Tue May 08, 2018 1:10 pm

It could be RS92-SGP, the bandwidth is about the same. I can’t do any proper signal analysis till I get my amplifier.

User avatar
m_a_x
Posts: 39
Joined: Sat Sep 13, 2014 10:13 pm

Re: Possible Radiosonde? help

Post by m_a_x » Sun May 13, 2018 11:52 am

Can you post a audio recording?

Username
Posts: 295
Joined: Sun Oct 09, 2016 7:27 am

Re: Possible Radiosonde? help

Post by Username » Sun May 13, 2018 3:24 pm

You should add Gain we cant see anything.

HobbyMan
Posts: 38
Joined: Sat Apr 07, 2018 1:55 am

Re: Possible Radiosonde? help

Post by HobbyMan » Sat May 19, 2018 2:00 pm

I figured it out. its LMS6. here is an example.

Post Reply