04.0°E AEHF-1 (relocated) (incl.)

hvdh thinks, these are what Feedsat calls "crazy spikes"! They are typical of secure jam-resist communications.
Both AEHF-1 and AEHF-2 are on the move in that area (see the AEHF topic, where I already mentioned that).

AEHF-1 (incl. 0.6°) was last observed at 30°W on 14 April, moving East 1° per day. Today would be near 21°W.

AEHF-2 (incl. 1.7°) was last observed at 0°E on 20 March, moving West 1° per day. Today would be near 35°W.

So one of the two has slowed down or stopped!
It would be great if you keep checking the coming days to determine the drift or exact location.

Probably 20.8°W is AEHF-1, and 26.0°W is AEHF-2...
Almost certain, after we know the drift direction of at least one of them!

Dreamsat & Feedsat, would it be possible to check again for these AEHF signals please?
There are no recent visual observations, probably due to the short nights, nowadays.

If the AEHF's have not stopped their drift yet, AEHF-1 will be about 5.5°W, and AEHF-2 will be 50...51°W.

If any of the two has stopped, these are AEHF locations (from ITU filings): 39°W, 31.5°W, 16.5°W, 9°W.

Part of the puzzle is solved, some swapping has taken place!

AEHF 1 (previously at 67.7°W) is stationary now at 4.0°E (incl. 0.5°).

4.0°E is the previous location of Milstar-2 F3, that now can be found at 19.0°E (incl. 7.5°).

And 19.0°E is the old location of AEHF 2, that by now probably is below the Western horizon for us.
(Edit June 27: AEHF 2 now stationary at 67.7°W)

P.S. I renamed this topic, hoping AEHF-1 will stay at 4.0°E for a while...

Thanks hvdh for these accurate updates

Whilst looking for something on 4.8E I noticed strong frequency hopping signals from something a little to the west of 4.8E. I'm guessing that this may be AEHF1 according to hvdh's list. I was using a band D LNB on a 1.5PF with an offset feed, linear, vertical, so it was not optimised. The CW signals at the low end are internally generated by the RX.

@mods, please edit and move to band C

/Done and merged in this toppic by qwer.

Still there, just a quick check, easy to recognize this satellite spectrum signature (I don't know what are these spikes, exactly... ?)

Zitat

Original von Feedsat
Still there, just a quick check, easy to recognize this satellite spectrum signature (I don't know what are these spikes, exactly... ?)

I think it is frequency hopping spread spectrum. It you look at the waterfall in my post above, each dot is a transmission. There may be multiple earth stations uplinking. If you look at a single frequency in the time domain you should see the individual pulses. Crazyscan catches an occasional, random, pulse as it sweeps.

There is one with a different hopping scheme here:

/edit by qwer: LINKs disappeared (01.08.2020).

Zitat

Original von s-band

I think it is frequency hopping spread spectrum. It you look at the waterfall in my post above, each dot is a transmission. There may be multiple earth stations uplinking. If you look at a single frequency in the time domain you should see the individual pulses. Crazyscan catches an occasional, random, pulse as it sweeps.

There is one with a different hopping scheme here:

/edit by qwer: LINKs disappeared (01.08.2020).

Alles anzeigen

Thanks for your explanations

I can see this kind of spectrum here too (1.2m).

Zitat

Original von qwer
I can see this kind of spectrum here too (1.2m).

Same situation today (circular left scan).

Just my current (here: linear) spectrum (20,5GHz-21,2GHz) with Inverto IDLK-SINL20-KAKU-OPP and modified CrazyScan Version 1.0.2.146.

Just another spectrum.

/edit: linear scan.

Zitat

Original von flie
yes there are some strange activity here too
spectrum changes continuously !!

Viewed using CS you will see snapshots of the frequency hopping signals.

See

/edit by qwer: LINKs disappeared (01.08.2020).

The light spots on the waterfall are individual transmissions, the spectrum is a snapshot of one capture.

Also

/edit by qwer: LINKs disappeared (01.08.2020).

A new AEHF location, at about 54.65°E.
Now the AEHF series is complete:
111.0°E (incl. 0.6°): AEHF-3 (USA-246)
54.65°E (incl. 5.9°): AEHF-5 (USA-292)
04.0°E (incl. 2.8°): AEHF-1 (USA-214)
67.6°W (incl. 2.1°): AEHF-2 (USA-235)
150.0°W (incl. 3.8°): AEHF-4 (USA-288)

103°W (incl. 7.5°): AEHF-6 (USA-298) was launched in March 2020 and is still slowly drifting West.

Just another look at circular left spectrum. About +2.0° iclination at scan time.