[amsat-bb] Has anyone made a satellite QSO with an orbiting ISS astronaut?

[Scott Harvey]

George,
ISS has specific amateur frequencies they have setup to operate on.  Voice channels below are from the ISS Fan Club page for voice comms.  Of course during SSTV events they are heard on 145.800 and APRS on 145.825.  The ISS repeater UHF uplink and 145.800 downlink was active on an alternate UHF uplink for a while a couple months ago mainly for experimentation with two satellite that were launched to relay their signals on the VHF downlink.  I a few stations made contacts through it when it was on, myself included.  It is always worth checking both 145.800 and 145.825 on a pass over your QTH.  I had a quick QSO with Mike Foale a few years ago by doing that and just happened to catch him on the voice channel.  On the VHF channels there is no need to adjust for Doppler.  It would be nice to see the astronauts on the voice channel more.  I know the last couple of years they have not been active during Field Day.
Amateur Radio Frequencies (Note: Only one mode active at a time) FM VOICE for ITU Region 1: Europe-Middle East-Africa-North Asia   
   - Downlink 145.800
   - Uplink 145.200
FM VOICE for ITU Region 2&3: North and South America-Caribbean-Greenland-Australia-South Asia   
   - Downlink 145.800
   - Uplink 144.490


73, Scott, KA7FVV
 President - KBARA  
www.kbara.org 
 Co-Owner WA7DRE 443.525 System Fusion Repeater
http://www.ka7fvv.net 

    On Thursday, December 21, 2017, 10:38:35 AM PST, George Henry <ka3hsw at att.net> wrote:  
 
 Hopefully someone from ARISS will chime in if I am wrong, but I believe that
the astronauts are only allowed to use frequencies that have been
pre-approved and ground-tested for safety with the ISS subsytems.  


Also, you would only have to correct for the doppler shift of the satellite
you are listening/transmitting to.  The ISS would have to correct for the
doppler on their end.

George, KA3HSW


-----Original Message-----
From: AMSAT-BB [mailto:amsat-bb-bounces at amsat.org] On Behalf Of Douglas
Quagliana
Sent: Thursday, December 21, 2017 10:53 AM
Cc: AMSAT -BB
Subject: Re: [amsat-bb] Has anyone made a satellite QSO with an orbiting
ISSastronaut?

Friends,
    Having hosted an ARISS contact myself earlier this year, I am well
aware of direct contacts
between the astronauts and someone on the ground.

    The relevant part of the question was the part about the QSO being
*THROUGH an
AMATEUR RADIO SATELLITE TRANSPONDER*.

    If you are aware of a success (or a failed attempt) I would be
interested in knowing
which astronaut and which amateur radio satellite was used.

    Lastly, does anyone have a technical references for correcting
calculating the Doppler
for a QSO from ISS through a satellite to the ground?  (And no, you can't
just change
the tracking program's ground station latitude/longitude every second to
match the ISS
satellite subpoint.)

Thanks and 73,
Douglas KA2UPW/5
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