Possible Radiosonde? help

[HobbyMan]

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 (338.55 KiB) Viewed 8117 times

...

NFM audio

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

[rtlsdrblog]

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]

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

[m_a_x]

Can you post a audio recording?

[Username]

You should add Gain we cant see anything.

[HobbyMan]

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