Queqiao (Lunar relay for Chang'e 4)

    • Offizieller Beitrag

    See


    /edit by qwer: LINKS disappeared (01.08.2020)


    for links. This is the beacon from Queqiao, the lunar relay satellite for the Chang'e 4 mission. Stronger than DSLWP-B. 2234.522MHz (+/- doppler) LHCP. 1.2m dish, 0.6dB LNA, 0.5Hz bandwidth, 250Hz/division on plot. The frequency drift is doppler but wobble is due to the poor reference in the Pluto SDR.

    Bilder

    1.2m Prodelin 3122 az-el with one of:
    S: Helical feed, 0.8dB NF LNA, X: 1.2dB NF LNA, conical feed,     Ku 12-18GHz: corrugated conical feed, 1.5dB NF LNA, Ku (Standard): SMW Q-PLL type C, Prodelin feed. Ku (Extended): 11.3GHz LO SMW & Prodelin Feed Ka: Gilat ex-ODU PLLs Gilat feeds, Ka 18-26.5GHz: Patriot feed, home made 4dB NF LNA, Ka DSN: Corrugated conical feed, home made 3dB NF Down-Converter

    1.5m IRTE, Polar mount with Octagon OSLO mod. C120, IRTE feed
    40km East of London, UK

    2 Mal editiert, zuletzt von s-band ()

    • Offizieller Beitrag

    This plot shows the doppler change and has a GPS locked reference signal on 2234.521700MHz to show the SDR reference wobble

    Bilder

    1.2m Prodelin 3122 az-el with one of:
    S: Helical feed, 0.8dB NF LNA, X: 1.2dB NF LNA, conical feed,     Ku 12-18GHz: corrugated conical feed, 1.5dB NF LNA, Ku (Standard): SMW Q-PLL type C, Prodelin feed. Ku (Extended): 11.3GHz LO SMW & Prodelin Feed Ka: Gilat ex-ODU PLLs Gilat feeds, Ka 18-26.5GHz: Patriot feed, home made 4dB NF LNA, Ka DSN: Corrugated conical feed, home made 3dB NF Down-Converter

    1.5m IRTE, Polar mount with Octagon OSLO mod. C120, IRTE feed
    40km East of London, UK

    Einmal editiert, zuletzt von s-band ()

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