Mars 2020 (M20)

  • Mars 2020 launched on 30th July. It's frequency, without Doppler compensation, is 8415.000MHz, RHCP.

    There are both amplitude and frequency variations as it spins. r00t.cz and Daniel Estévez have been decoding the telemetry.


    Signal a few hours after launch:

    Amplitude variations in time and frequency domains:

    1.2m Prodelin 1224 az-el with one of:
    S: Helical feed, 0.8dB NF LNA, X: 1.2dB NF LNA, conical feed,
    Ku wide band: corrugated conical feed, 1.5dB NF LNA, Ku (Standard): Octagon OSLO mod for C120 & ext ref 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

  • Now at 1.3 million km I can no longer see the modulation. The amplitude and frequency variations are still there.



    1.2m Prodelin 1224 az-el with one of:
    S: Helical feed, 0.8dB NF LNA, X: 1.2dB NF LNA, conical feed,
    Ku wide band: corrugated conical feed, 1.5dB NF LNA, Ku (Standard): Octagon OSLO mod for C120 & ext ref 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

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