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Working Satellites

Discussion in 'Satellite and Space Communications' started by NA1SA, Jan 25, 2010.

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  1. NA1SA

    NA1SA Premium Subscriber QRZ Page

    I recently started working V/U satellites. I am using a Yaesu FT-60R HT and an Elk 2M/440L5 antenna. I have had success with AO-51 and AO-27. I am looking to try HO-68 and SO-50 in the future. Also, after a little poking around, it appears the ARISS(ISS) also supports a V/U amateur satellite repeater, although I found a discrepency in frequencies. AMSAT shows 145.800 Uplink /437.800 Downlink, the ISS fan page shows 145.990 PL 67.0 Uplink / 437.800 Downlink. Has anyone had success working ISS and if so, which frequencies are correct? Also, here are the frequenices I have been given for HO-68 and SO-50. Are they also correct?

    HO-68 - 145.825 PL67.0 / 435.675
    SO-50 - 145.850 PL67.0 / 436.795


  2. W9GB

    W9GB Ham Member QRZ Page

    Marlin -

    You should enjoy the HO-68 North American pass (North -> South) each morning ~ 10 AM CST
    Although you may hear a bit of fading (satellite tumble?), with a good Arrow style yagi,
    you should be able to make a few contacts.

    Satellite Status

    HO-68 operates via a "pre-loaded" schedule by CAMSAT (Chinese AMSAT) controllers.
    Basically -- you should ALWAYS be able to hear the low-powered CW beacon.
    The satellite will be in traditional satellite linear transponder (SSB/CW) OR repeater mode (FM) / Packet (AX.25) ---
    WHEN it is in sunlight (Positive Power budget) and not in commissioning modes.

    HO-68 (XW-1) satellite information

    HO-68 (XW-1) Operational Schedule -- Dates and Times are UTC
    CAMSAT web site for satellite -- schedule is seen in the LEFT column.
    Checking schedule for this week -- you will note that HO-68 is in Linear transponder (SSB/CW)
    mode for this week -- NOT FM repeater!

    Amateur Radio on the International Space Station (ARISS) has its own web site!

    The ARISS International Teleconference was held on Tuesday January 19, 2010.
    Minutes of the meeting can be found here -- for the latest NEWS:

    Regarding the ISS radio station, the Ericsson radios are housed in the Russian segment -- due to opportunity to reuse a spare antenna already installed outside the module (no longer used for RU operations).
    On Saturday, November 21, 2009 new amateur radio antennas were installed outside the Columbus (EU) module of ISS --- with radio equipment to be sent, moved or repositioned -- as time and permission of ISS management permits.

    The UPDATE provided last week on ARISS radio migration/changes.

    4. Columbus module status, Presenter: M. Severance
    Regarding the integration of a VHF/UHF capability, the antennas were successfully installed during and EVA on STS-129. There has been progress towards getting a “Black Brick” computer power supply to power the packet module that would in turn power one Ericsson radio at a time, either the VHF or the UHF unit.
    Discussions with ESA are leaning toward the installation of the equipment near Express Rack 3, the first rack on the right just as you enter the Columbus module and close to the coax antennas.
    Mark is working the manifesting of necessary cables on STS-134, ULF-6, in July of 2010.
    Mike Fincke of NASA and Roberto Vittori of ESA are both on that flight and we hope to take advantage of their interest in ham radio to get the equipment installed and checked out.

    Sergey raised the need to ensure that all ISS radio systems can be operated without mutual interference.
    Part of the discussion will be the choice and coordination of frequencies of operation across all potential ham bands.
    Mark Severance noted the importance of this issue and that much of the work has already been accomplished.
    The Ericsson radios were approved for use in the Russian segment already -- so the process of extending this certification into the Columbus module should be straightforward and no problems are anticipated.
    ARISS operations will take into account any potential interference (RFI) between radio systems in the Russian segment and the Columbus module, if any actually occurs.
    An important consideration in this will be simultaneous operations of more than one radio station at a time.

    The STS-130 shuttle flight is scheduled for launch on February 7, 2010 .. this flight will bring the Tranquility/Colbert module and the Cupola (viewing portal) always facing the Earth.

    Posting this question on the AMSAT-BB reflector will provide you with the latest updates from the ARISS/AMSAT coordinators.

    Last edited: Jan 25, 2010
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