1
40
submitted 2 months ago* (last edited 2 months ago) by [email protected] to c/[email protected]

Both received and decoded in SatDump on Android.
The 321 composite PNG is 65MB, so I compressed it... and then Imgur compressed it even further so there's some extra compression artifacts, but anyway.

And a note: Look4Sat app seems to have wrong TLE for M No. 2-4. Thankfully there was a similar pass to one shown, just 15 minutes later and more to the west.
TLE on N2YO.com is right.

Edit: Ran the decoder again with baseband. It removed the lines from middle.

2
37
submitted 2 months ago by patryk3211 to c/[email protected]

Captured from Poland on April 10th at 17:00 UTC, looks like channel A switched to IR mid scan. The satellite is NOAA-15.

3
23
submitted 3 months ago by x2Zero7 to c/[email protected]
4
8
ISS SSTV (sopuli.xyz)
submitted 8 months ago by [email protected] to c/[email protected]

It's transmitting on 145.8MHz FM in the 2m HAM band
times (from amsat-uk):
Fri Oct 27 at 12:15 GMT – Sun Oct 29 at 18:50 GMT
Tue Oct 31 at 10:05 GMT – Wed Nov 01 at 18:10 GMT

a couple more:

5
20
submitted 8 months ago by [email protected] to c/[email protected]

From 2023-10-12
Projected:

Day Microphysics projected:

6
15
submitted 8 months ago by [email protected] to c/[email protected]

Scan motor current is going up again, maybe it will fix?

7
7
submitted 9 months ago* (last edited 9 months ago) by [email protected] to c/[email protected]

The telemetry for the NOAA POES satellites is in the TIP data along with the HIRS and SEM data. The content is not known, but the format is.
At least everything on the star nesdis page should be in there, including the AVHRR scan motor current I was looking for.

I wrote a program to dump this telemetry to CSV and found the one column that rose at the same rate as the scan motor should.

It's not a perfect match, NOAA probably multiplies it by some unknown value to find the actual current, and my data is only from when the satellite was overhead, so it's a bit low resolution

official NOAA data:

There are still hundreds of unknown values that I haven't and have no way of figuring out, here is the raw CSV data if anyone is interested: link
It's concatenated from months of data, so it's full of skips, there is a millisecond timestamp on the first column, but it's out a few hours and sometimes corrupted.
Some fields are also super commutated still.

8
13
submitted 10 months ago by [email protected] to c/[email protected]

Not another one

9
13
submitted 10 months ago* (last edited 10 months ago) by [email protected] to c/[email protected]

Waterfall:
Click to view image directly

Baseband recording (cut with SDRAngel using FileSink)

When modulated, it looks like Orbcomm mobile telephony, but in that case the data bursts happen more often and there's no visible carrier.
I also didn't find anything corresponding in the Happysat's Deadsat list.

What could it be? Zombie Orbcomm satellite or something else?

10
25
submitted 10 months ago by [email protected] to c/[email protected]

I wonder what NOAA is doing? They did this on 2023-08-28 too.

11
6
submitted 10 months ago by [email protected] to c/[email protected]

I made a status page for the 137MHz weather satellites (like happysat's meteor one)
Hopefully this is useful to someone, I think I went overboard on the details but maybe that's helpful

github link
self hosted forgejo link

12
11
submitted 10 months ago by [email protected] to c/[email protected]

The main image in post was decoded with WXtoIMG as both noaa-apt and SatDump fail to synchronize it correctly.

Unprocessed image from noaa-apt:

Compatibility image link

Waterfall:

Compatibility image link
There you can see some breaks, the noticeable horizontal lines.

Which sounds like so (note: the waterfall shown above isn't from the same time as audio):

Compatibility audio link

And the bonus, DSB images:

Compatibility image link
Channels 1-20 are left-to-right then bottom.

And also AVHRR scan motor current as of today:

Compatibility image link

13
13
submitted 10 months ago by [email protected] to c/[email protected]

The MIRP seems to be having trouble keeping channels in sync with the broken data, the sync pulses are different sizes on the black and white telemetry bars and breaking the software syncing.
NOAA-APTs attempt at syncing:

14
11
submitted 10 months ago by [email protected] to c/[email protected]

On the DSB:

I also wanted to record the NOAA-18's direct sounder broadcast at 137.35MHz, but it just suddenly cut off and haven't re-appeared: Direct image link

What's with that?

15
34
submitted 11 months ago by [email protected] to c/[email protected]

Captured with RTL-SDRv3 and V-Dipole.
Processed in SatDump (Android).

16
7
submitted 1 year ago* (last edited 1 year ago) by [email protected] to c/[email protected]

This is a composite of one meteor LRPT pass and 4 NOAA APT passes (with false colour) from 2023-07-28, the first day of meteor-m2 3 LRPT.
I resized and JPEG compressed this image to not kill your internet connection but the original 109MB image is here.

All composites here are produced with SatDump.

Some more composites of this day are below (lower resolution). All of the titles go the the original PNGs.
with map overlay:

only NOAA APT:

and with NOAA HIRS from DSB because why not:

longer HIRS

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8
Hello (lemmy.douwes.co.uk)
submitted 1 year ago by [email protected] to c/[email protected]

Hello there. I used to run a small instance for a few of my hobbies but I ended up shutting it down before anyone actually used it. Most of the other topic on there have already moved to custom instances or communities on big instances but this one hasn't yet. I dislike opening yet another community on lemmy.world but I don't think it's suitable to use a personal instance for a community so I ended up making it on lemmy.world anyway.
It's probably for the best because my server is already overloaded, but what do you think? should I host it or just leave it here?

Amateur Satellites

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Discussion about amateur reception and processing of data from artificial satellites, primarily through radio signals but data from internet resources is welcome too.

founded 1 year ago
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