[sarex] Re: ARISS events

Roger Kolakowski rogerkola at aol.com
Fri Mar 16 12:15:16 PDT 2007

Thank you, I hadn't seen it mentioned before and with the apparent sudden
loss of contact with the school today I wondered how doppler was handled.

Thanks again and keep up the good work!


----- Original Message ----- 
From: "Ransom, Kenneth G. (JSC-OC)[BAR]" <kenneth.g.ransom at nasa.gov>
To: "Roger Kolakowski" <rogerkola at aol.com>; <sarex at AMSAT.Org>
Sent: Friday, March 16, 2007 4:49 PM
Subject: RE: [sarex] ARISS events

Yes the ground stations compensate for Doppler on the uplinks and
downlinks during the contact. They use any of the standard methods to
adjust for the +/- 3.3 KHz Doppler. Manual control via a prediction
table, preprogrammed memories or computer control of their rig.

Kenneth - N5VHO

-----Original Message-----
From: Roger Kolakowski [mailto:rogerkola at aol.com]
Sent: Friday, March 16, 2007 1:48 PM
To: Ransom, Kenneth G. (JSC-OC)[BAR]; sarex at AMSAT.Org
Subject: Re: [sarex] ARISS events

Sorry Ken and Tim...

I guess my real question should have been..."do the school ground
stations compensate for doppler on their uplinks during their contacts?"

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