This is @ 16°W , Luch 5B or what ?
the spectrum varies continuously
This is @ 16°W , Luch 5B or what ?
the spectrum varies continuously
Interesting this one! At the time you reported, AEHF 2 (about 16.5°W, 2.5° incl.) crossed the belt.
Luch-5B will cross much later, about 23:50 CEST.
Officially EHF is 30...300 GHz. Probably that shouldn't be taken too literally and AEHF series (also) uses Ka-band 20.2...21.2 GHz.
And AEHF uses frequency hopping, for high security/reliability.
Can you confirm the spikes are much weaker now (without tracking)?
ZitatAlles anzeigenOriginal von hvdh
Interesting this one! At the time you reported, AEHF 2 (about 16.5°W, 2.5° incl.) crossed the belt.
Luch-5B will cross much later, about 23:50 CEST.
Officially EHF is 30...300 GHz. Probably that shouldn't be taken too literally and AEHF series (also) uses Ka-band 20.2...21.2 GHz.
And AEHF uses frequency hopping, for high security/reliability.
Can you confirm the spikes are much weaker now (without tracking)?
Right now @ 7:30 PM CET, If I don't manage the elevation, I have nothing.
Signals appears if I set a low level elevation (really low)
Thanks for trying again, I'll add Ka (c) to the list for the two AEHF satellites.
(The other one, AEHF 1 at 68°W will be too low for you I guess).
ZitatOriginal von hvdh
Thanks for trying again, I'll add Ka (c) to the list for the two AEHF satellites.
(The other one, AEHF 1 at 68°W will be too low for you I guess).
Not impossible, the theoretical elevation angle for 68°W is around 3.80° from my QTH (cf :satlex)
ZitatOriginal von hvdh
Yes that is a SBIRS-Geo 2 frequency, I think it's known already here, by you or the others at satellites.co.uk.
About AEHF-2, I just wanted to say the spikes should be missing at 16.5°W, and while still on the move, will probably not be transmitting!
AEHF-2
Got it ! but not @ 22°E but at 19. 19.5°E and spikes are active.
The spectrum is easy to recognize.
Spectrum in video
ZitatOriginal von Feedsat
AEHF-2
Got it ! but not @ 22°E but at 19. 19.5°E and spikes are active.
The spectrum is easy to recognize.
Spectrum in video
The satellite hasn't move since my last scan, between 19 and 19.5°E
it has left 16°W because of ABS 3 ?
Sorry I overlooked your previous post Feedsat. So congratulations with finding AEHF 2 again! Is it slightly East or West of 19.2°E ?
We'll have to wait if, and where, ABS-3 will use Ka-band.
If in military band too, then indeed 16.0°W next to 16.5°W would have been quite close, though both are inclined.
ZitatOriginal von hvdh
Sorry I overlooked your previous post Feedsat. So congratulations with finding AEHF 2 again! Is it slightly East or West of 19.2°E ?
We'll have to wait if, and where, ABS-3 will use Ka-band.
If in military band too, then indeed 16.0°W next to 16.5°W would have been quite close, though both are inclined.
According to the analyzer, it's a bit more to the east, if I decrease the elevation once more, I can start to see the strong spike of SBIRS-Geo 2.
Finally a fresh TLE, confirming AEHF 2 at 19.2 or 19.3°E.
I can see the spectrum around 5°E today (low elevation right now)
The satellite has moved again
AEHF-2 (incl. 2.1°) was lastly observed at 19.0°E on 8 March.
So in theory, can have travelled to 5°E.
However the previous Milstar series will have similar, secure communications in Ka-band.
Milstar-2 F3 (incl. 7.0°) was lastly observed at 4.2°E on 4 Feb.
On Gunter's space page, it says Milstar uses very narrow beams, so will not always be received.
Hopefully, with the different inclinations, you can figure out what satellite it is!
According new TLE's of observation on 8 April, AEHF-2 and Milstar-2 F3 are still at 19.0°E and 4.0°E, respectively.
So now even more, I think you received Milstar-2 F3 around 5°E
OK, thanks for the update
I will check both positions next time.
ZitatOriginal von hvdh
According new TLE's of observation on 8 April, AEHF-2 and Milstar-2 F3 are still at 19.0°E and 4.0°E, respectively.
So now even more, I think you received Milstar-2 F3 around 5°E
OK, checked tonight,
AEHF-2 still at 19°E but unfortunately, no sign of signal at /5°E whatever the elevation used.. I'll keep an eye on it during the next days.
AEHF-2 tonight spectrum
AEHF satellites are on the move according visual observations!
AEHF 2 (incl. 1.7°) has left 19.0°E, moving West and could be anywhere between 0°E (when last observed on 20 March) and 23°W (today).
Milstar-2 F3 (incl. 7.5°) has moved from 5.4°E to 19.0°E as a replacement.
AEHF 1 (incl. 0.6°) has left 67.7°W, moving East and could be anywhere between 41°W (when last observed on 3 April) and 35°W (today).
Sie haben noch kein Benutzerkonto auf unserer Seite? Registrieren Sie sich kostenlos und nehmen Sie an unserer Community teil!