Posts by hvdh

4192 MHz must be from a normal transponder, not TT&C.
If linear (vertical), it's IS-25. If circular, it's IS-904.

Surely the friendly parameters are to compensate the loss during inclination, for fixed dishes.
These are the (all locked) values now during 0° inclination, with 1.2 m and Dr. HD F16:
11060H 14.5 dB, 11265V 4.0 dB, 11345V 3.7 dB, 11385H 3.5 dB.

I had forgotten that AMC-14 relocations always are done very slowly.
Making me think control of this satellite was finally lost.
But a manoeuver happened a week ago, reversing the East motion to slowly West.
AMC-14 appears to settle now at 30.6°E, with 23.7° inclination.
Below shows the motion since 20 September.
Update 6 Nov 2025: still not completely settled, near 30.25°E now.

SBIRS-Geo 5 has moved to 94.0°E meanwhile.
20.9°E is now occupied by SBIRS-Geo 4 that arrived yesterday.

51.8°E has SBIRS-Geo 1, and 49.8°W has SBIRS-Geo 2.

4°W is mostly shaded on my dish, only very strong signals (like from 5°W) may make it.
Thanks for checking this in-orbit testing!

I also didn't find a frequency plan (as usual nowadays).
On my web page, added the "3" for the 11.2...11.45 GHz band, and removed the "?" for 11.45...11.7 GHz.
Marcus_21 found carriers near 11160 V, so a "2" should also be added probably.

Dror-1 is centered at about 3.98°W for the last 3 days.
It may well aim for 4.0°W exactly, but it takes a few weeks to confirm that.
Amos-7 (which left in March this year) was at 3.88°W.
Perhaps this means, Dror-1 indeed will replace Amos-3 at 4.13°W (launched in 2008).

These Invacoms were the best choice about 20 years ago, before the IBU's existed!
The IBU's perform better for most (also in my case, when they came out back then).

AMC-14 stayed at 17.5°E since my post above, but since the beginning of May 2025 it appears control is lost, and the satellite started drifting to the East. Now it's near 19°E.

s-band Sorry I also have trouble to interpret the ITU names.
Only thing I sometimes do, is search for other satellites of a series, to figure out what the ITU name should probably be like.
There was a site comparing the names, geostationary.cz, but it seems offline. Maybe archive.org still has some content.

I receive these 6 transponders too, over 12 dB with 1.2 m in rainy weather.
This map seems to fit best, it's on the Amos site: https://amos-spacecom.com/satellites-amos-4/

SBIRS-Geo 2 has been relocated from 38.0°W to 49.8°W.

Dipollänge ist nicht so ganz wichtig, Reflektor und Direktor(en) beschränken die Bandbreite, die für E2...E4 relativ Gross sein muss (für ein Yagi).
Aber ist der Spass in Band I nicht schon lange vorbei?

In Band I gab es neben Es (Sporadic-E) und F2 ab und zu auch Tropo überreichweiten, hier die Deutschen die ich in die 80'er fotografiert habe!

I don't think the frequency plan posted above is correct, because it doesn't match the existing transponder mapping.
Instead, this provisional plan made by Marcus_21 based on in-orbit testing at 50°E makes more sense.

According both Lyngsat and Portal BSD, the only analog still active is 3730 V TV Verdade.

Quote from hvdh

By the way, recent articles say that testing at 50°E is finished finally, and 6A should move to 42°E soon.

Turksat 6A left 50°E and is on the move, near 48°E now.

Quote from femi

Der USA257 (CLIO) NORAD 40208 wäre eine Option. Er befindet sich auf 21.7E. ob der mit X-Band ausgestattet ist, konnte ich nicht verifizieren.
The USA257 (CLIO) NORAD 40208 would be an option. It is located at 21.7E. I couldn't verify whether it was equipped with an X-band.

CLIO
1 40208U 14055A 20180.20928624 0.00000000 00000-0 00000-0 0 06
2 40208 0.0961 120.8977 0014997 230.4577 129.3781 1.00281279 05

Aber leider, die letzte TLE (von McCants liste) ist von Juni 2020, d.h. seitdem wurde CLIO nicht mehr beobachtet und gemeldet.
Zudem bewegte CLIO sich damals langsam nach Osten, also jetzt könnte CLIO irgentwo auf dem Clarke-belt sein.

I still don't know what non-inclined satellite this can be, other than Yamal-601 having "secret" X-band payload.
Turksat 6A at 50°E has X-band payload, but was launched July 2024 and can't explain s-band finding in 2023.
By the way, recent articles say that testing at 50°E is finished finally, and 6A should move to 42°E soon.

My 10805 H is spill-over from 62°E, giving almost 19 dB when pointing there.

More peaks appearing, but only 2 locks.

Quite different dB levels here in NL.

All 3 found a new location.