u/woodzy_chimera

So I can't find a decent website that I can cross check previous satellite pass (maybe I'm bad at it and can you provide me one?).

Also I assume this is a satellite due to the doppler shift effect, but correct me if this is something else. I captured it 12:26:14 UTC, Oct 4 2026

What could this be?

EDIT: Radiosonde

So I haven't done some in depth research yet, but I saw that this is the band 4 (correct me if I'm wrong)

I also saw this MCR IR (3rd photo), which is different from the usual MSU-MR/221/321 images

EDIT: It broadcasted 124 too: https://www.reddit.com/r/amateursatellites/comments/1wm5gc9/comment/pb4a2nq/?utm_source=share&utm_medium=web3x&utm_name=web3xcss&utm_term=1&utm_content=share_button

I also noticed that it always ends with white slant small line on the top left.

EDIT:
This is how it sounds like via USB demod - https://www.reddit.com/r/signalidentification/comments/1wdjmg0/comment/p96kxvx/?utm_source=share&utm_medium=web3x&utm_name=web3xcss&utm_term=1&utm_content=share_button

EDIT:
Around 11-09-2026 8:52 UTC

I'm a newbie in decoding hades spinny one. I recorded a passing over me around Sept 9, 2026 04:26 AM UTC.

I'm trying to track it manually: piped to a virtual audio to sound modem from AMSAT EA website.

However, I'm not getting any decoded bins or text. I also attached my current settings. Yes, KISS Genesis is also running but I'm not sure if it's really required to display text on sound modem window.

I also assume that maybe my SNR is too low?

Here is the baseband wavrf64 if you want to check it (signal starts at 436.882mhz, 2.4msps): https://drive.google.com/file/d/1ES8d49O65Qvm1dRYH95cED22QfIGlQX3/view?usp=sharing

Mine isn't the best, but seems like working fine with me (aside from few curious glances with people). Been using it for like 2 months now. I live on a city.

I use microphone phone holder to hold both the phone and my spare RTL SDR V4 dongle.

For dongle to phone, I use a short USB A female to USB C OTG adapter.

For antenna, I use Nagoya NA733 with male to male SMA adapter. I do add some random wire for grounding. Sometimes I switch it with a V dipole if I have the chance to sit and be stationary.

I did add some padding between the dongle and the holder so it doesn't scratch (pressure cooker rim pads + self healing tape).

Around 14-15-41_03-09-2026 UTC

RTL SDR V4, V dipole 16cm antenna, TQP3M9037-LNA (those cheap yellowish LNAs)

Yes the tune is really cut off (at least from my reception) rather than abrupt video cut.

Captured: Aug 31, 2026 17:22 UTC.
Baseband wav file (UINT16): https://drive.google.com/file/d/17FQYJ9zM4ORt7d0kVLSW_pQcK4S1xEAz/view?usp=sharing

So by the looks from signal identification wiki, I assume it's a scrambled voice. But I can definitely hear some numbers and discernable word so I doubt.

Additional context:

- it's nearby active XSQ Guangzhou Station broadcast frequencies (I always see those 3 long dash then XSQ in morse code plus WEFAX).

- I also found a DSC from Ho Chi Minh Ville Radio nearby.

Is it maritime broadcast radio that gives some sort of direction?
Or maybe just a traditional shortwave station?

18:58:06 UTC on August 30, 2026
59.4 degree pass

using RTL SDR v4 blog and V dipole

Aug 30, 2026 1:06:35 UTC

So M2-3 satellite always pass here but during the night. This is my first daylight capture with that satellite (gotta appreciate that landmass)

EDIT: only during the night I receive a good pass (60 degrees plus)

Sadly it will be discontinued soon in my place :((

Aug 29, 2026 06:20 UTC

So I used to just extend the antenna to max(dipole) and I always get only like stripped image and maybe for like few seconds.

After learning some antenna information, I extended it to right length (plus angle it a bit to account for overhead pass) and captured this (clouds hide the land mass but I think it creates a new aesthetic). It lasted around 8 to 10mins if I'm not mistaken.

Maybe having those satellite dedicated antennas would improve this even more (like what ppl are posting here)

Newbie.

So I heard this signal when I visited a nearby sea port. Did some digging and I found that it's kinda similar to this: https://www.sigidwiki.com/wiki/2G_(GSM)_Global_System_for_Mobile_Communications

Is it GSM 2G? Or Am I just hearing things (sorry my hearing wasn't that good)?

EDIT: Sounds similar to when you put your old phone nearby an old speaker and you're about to receive a call.

Finally after almost a month of trial and error and tracking, my very first SSTV decode (it's addicting)! yay!

Time: 2026-08-25 02:21:50 UTC
Satellite: UMKA-1
Gear: RTL SDR v4, 16cm dipole (vertical orientation), LNA (TQP3M9037-LNA)

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?