RS-44 / DOSAAF-85

  • from Nico PA0DLO:

    The new amateur payload DOSAAF 85 appears to work very well.

    Doppler measurements confirm that it is indeed object 44909,

    2019-096E. The satellite identifies itself as "RS44" (i.e. Radio

    Sputnik 44) on its CW beacon on 435.6043 kHz. The passband is

    about 63 kHz wide. It may also have a downlink between 2400 and

    2485 MHz. The frequencies of RS44/DOSAAF 85 have not been IARU

    coordinated. The satellite is in an elliptical orbit with a perigee of

    1175 km, an apogee of 1511 km and an inclination of 82.5 degrees.

    The payload is apparently attached to the Breeze-KM upper stage of

    a Rokot launch vehicle that launched three Gonets satellites on

    December 26, 2019. It was originally expected to launch in 2015.

    It is based on the Yubileiniy platform.

    For details, see <>



    Nico PA0DLO

    On 30-04-2020 10:08, Blinov Igor via AMSAT-BB wrote:

    Good day!
    Satellite DOSAAF-85 turn on transponder (linear, inverting) on for testing purposes.
    UPLink 145965KHz ±30 KHz
    DOWNLink 435640KHz ±30 KHz
    BEACON 435605KHz
    1 44909U 19096E 20120.96346743 +.00000010 +00000-0 +00000-0 0 9999
    2 44909 082.5239 027.5343 0217449 340.2089 019.0669 12.79706663015985
    Try it!
    73! Igor, RW3XL

    Peter Gülzow | DB2OS | AMSAT-DL member since 1983 | JO42VG

  • The failure of RS44/DOSAAF 85 (also known in Russia as "Radio 2017") to separate from the Breeze-KM stage also prevented the deployment of BLITS M1, an experimental passive laser reflector satellite.

    With RS 44 now attached to the Breeze-KM stage, its gravity gradient stabilization boom can not be extended, because that is at the side where the satellite is attached. But fortunately all radio antennas are at the end of the satellite that points away from the stage.

    Therefore the radio equipment of RS 44 is fully operational and works well.

    The CW beacon on 435.604 MHz still only sends its ID "RS44".

    Maybe later some telemetry can be sent as well.


    Nico PA0DLO

    Peter Gülzow | DB2OS | AMSAT-DL member since 1983 | JO42VG

  • I can confirm this. RS44 really works. It was a high activity at the transponder a few minutes ago.

    The signal had very fast QSB and I guess it is not as strong as FO-29 was/is on 70cm downlink.

    Best regards