24.8°W Alcomsat-1

Carriers indeed very easily show as cross-polarisation peaks in the scans.
I'm still not convinced there is any H transponder above 12.5 GHz.

So far, I guess the following transponders below 12.5 GHz:
12160 H/V
12200 H/V
12240 H/V
12280 H/V
12320 H/V (the V not found yet)
12360 H/V
12400 H/V (the V not found yet)
12440 H/V (the V not found yet)
12480 H/V (the V not found yet)
Total 18 * 36 MHz transponders.

Edit: https://fr.wikipedia.org/wiki/Alcomsat-1
There it says 18 * 36 MHz + 4 * 54 MHz.

Keep on scanning gents, maybe the puzzle can be solved.

Yes flie, Intelsat 905 & 907 have 10.95...11.2 and 11.45...11.7 GHz. So it seems well coordinated.

The frequency plan below 12.5 GHz seems quite certain now. But to find the missing ones (in my table above) would be nice of course!

Flie, above 12.5 GHz you found 12557 H and 12627 V. 70 MHz separation with 54 MHz transponders seems a possibility.
So maybe there will be 12697 coming as well, or the opposite polarisations. As long as we end up with total 4 transponders!

Satesco has weaker peaks above 12.5 GHz, could be a different beam.

Longitude may actually be maintained at 24.75°W instead of 24.8°W, but to be sure will take several weeks.

Now: 12280 V

Now: 12360 V

12400 H (gone very quick) and 12420 H

Zitat

Original von flie
Hello qwer

Hi flie!

/edit: On again, I think: 12160 H

Zitat

Original von flie
may be they make a new one here ?

Yes sometimes the test carrier is not at the centre but at the edge of a transponder bandwidth.
But then usually, you can see the asymmetry at the "noise floor" of the transponder.

On again, I think: 12240 H

Zitat

Original von qwer
12400 H (gone very quick)...

Okay, now I got this carrier, before it´s gone quickly again, as you can see...