u/woodzy_chimera

Using SDR RTL v4.

Pardon for the bad reception and harsh statics.

Setup: RTLSDR v4 + the original shorter V dipole antenna that came with the unit

I pre recorded this a while ago and just did a play back.

EDIT: Apologies for the volume :/

I'm still a newbie and need help with M2-3 satellite.

So I have a few clear captures of Meteor M2-4.

However, I don't have with the M2-3 and this is the CLEAREST of them all (photo). It passed about 85 degrees overhead of me.

I also included here in the photo what the waterfall looked like and I noticed that it looks "bursty" (sorry I don't know the right word for it).

Im just using cheap setup:

- SDR RTL v4 with its V dipole antenna (extended both legs to max), vertical orientation

- SatDump v1.2.2: tuned to 137mhz, offset -900khz at 2.4MSPS, decoder METEOR M2-x LPRT 72k

Could it be due to my setup or is it the fact that the satellite didn't deployed fully? (although I saw someone here decoding M2-3 clear as day)

I'm doing this in SDR++ and it's in Military Air band, and I'm not sure. There's no bases in here nearby.

It also doesn't show any signs of weakening. I don't have any device nearby that might produce it that I known of. Maybe a telemetry device from neighbors?

(I deleted my old similar post)

So when I use AM it sounds like ship foghorn. When I use USB, it sounds like tesla coil electric buzz.

Done some quick research and I saw that it could be a chirper, but not sure. It fires every 40 to 45 sec.

I'm using cheap sdr rtl v4 with v-dipole antenna. I maxed out the gain since this is a faint signal.

Could this be just an internal RFI? Any idea?

Complete newbie and it's my very first time decoding a satellite (meteor m2-m4) in my whole existence haha (using my cheap setup of sdr rtl v4 and v-dipole antenna)

But i'm curious about the params in Satdump ..

for context:

- recorded via sdr++ to uint8 wrapped in a wav file

- tuned to 137khz at 2.4msps

- satellite signal appears that its middle is around 137.9 (confirmed both by viewing in Satdump recorder tab and Airspy)

Now in Satdump, I set an offset frequency of 1.5MHZ (based on the FFT shown while baseband FFT enabled while decoding).

If it's 900khz, it would make sense. But 1.5MHZ? idk where it's coming from.

Any ideas?