94.2°W AEHF-2 (relocated from 67.6°W) (incl.)

    • Offizieller Beitrag

    This is @ 16°W , Luch 5B or what ?


    the spectrum varies continuously

    Bilder

    • Offizieller Beitrag

    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)?

    • Offizieller Beitrag


    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)

    • Offizieller Beitrag

    Here is the result on the analyzer: Video

    • Offizieller Beitrag
    Zitat

    Original 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)
    :79:

    • Offizieller Beitrag
    Zitat

    Original 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

    • Offizieller Beitrag
    Zitat

    Original 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 ?

    • Offizieller Beitrag

    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.

    • Offizieller Beitrag
    Zitat

    Original 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.

    • Offizieller Beitrag

    Thanks hvdh.


    the signals are still active.

    • Offizieller Beitrag

    I can see the spectrum around 5°E today (low elevation right now)


    The satellite has moved again

    • Offizieller Beitrag

    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!

    • Offizieller Beitrag

    OK, thanks for the update :68:


    I will check both positions next time.

    • Offizieller Beitrag
    Zitat

    Original 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 :68:


    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

    • Offizieller Beitrag

    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).

  • qwer

    Hat den Titel des Themas von „67.6°W AEHF-2 (relocated) (incl.)“ zu „94.2°W AEHF-2 (relocated from 67.6°W) (incl.)“ geändert.

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