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Study of Transmit/Receive Radio Signal Conditions in the Russian Segment of ISS Using the World-Wide Ham Radio Network (Ten'-Mayak)
12.05.12

OpNom:

Overview | Description | Applications | Operations | Results | Publications | Imagery

Experiment Overview

This content was provided by V. I. Lukyaschenko, Ph.D., and is maintained in a database by the ISS Program Science Office.

Brief Summary

Ten'-Mayak (Shadow-Beacon) uses the onboard ham radio to send time stamped VHF information packets which are received and recorded by amateur receiving stations around the world. The activity will be repeated when Russia does test firings of a planned plasma engine to understand the extent that the artificial plasma generated blocks the transmissions.

Principal Investigator(s)

  • V. I. Lukyaschenko, Ph.D.
  • Co-Investigator(s)/Collaborator(s)

    Information Pending

    Developer(s)
    Information Pending

    Sponsoring Space Agency

    Russian Federal Space Agency (Roscosmos)

    Sponsoring Organization

    Information Pending

    ISS Expedition Duration:

    April 2007 - March 2011



    Expeditions Assigned

    15,16,17,18,25/26

    Previous ISS Missions

    Information Pending

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    Experiment Description

    Research Overview

    Information Pending

    Description

    Study of USH-radio signal transmit/receive conditions in the mode of onboard radio beacon in the ISS RS using world-wide ham radio network. Determining characteristics of radio Signals retransmitted through onboard transceiver, their quality and spatial distribution. Assessment of disturbing actions, such as re-reflection, shading caused by structural elements and value of the ISS elevation angle.

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    Applications

    Space Applications

    Information Pending

    Earth Applications

    Information Pending

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    Operations

    Operational Requirements

    Complex of amateur packet radio communication set with 145/430 MHz frequency range:

      receiver/transmitter
      4 antenna feeder devices
      2 power supply units<
      controlling computer

    Operational Protocols

    Generation of onboard radio beacon probing pulses as time marks to ground receiving network (including ham radio receivers of USW) and transmission of the measurement results throughout Internet network. Check of the concept of forced radio silence in the mode of short-packet generation by radio communication Protocol AX25. Determining of ISS structural members effect on onboard antenna directional pattern (DP) in flight conditions. Determining zones of DP radio shadowing zones by the station structural members depending upon its spatial orientation. Assessment of ground receiving network non-uniform sensitivity on accuracy in spatial-time measurements. Determining of ground receiving network radio visible configurations depending upon an angle of elevation and light-shadow situation along the flight course.

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    Results/More Information

    Files containing data on the recorded radio signals (time, place, frequency-phase characteristics) transmitted through Internet from each ground-based receiver within measurement USW network at the address of the Center for Scientific Data Acquisition and Processing.

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    Related Websites
  • Energia - Science Research on the ISS Russian Segment
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    Imagery

    Information provided by the investigation team to the ISS Program Scientist's Office.
    If updates are needed to the summary please contact JSC-ISS-Program-Science-Group. For other general questions regarding space station research and technology, please feel free to call our help line at 281-244-6187 or e-mail at JSC-ISS-Payloads-Helpline.