[sarex] Re: Future ISS amateur radio modes

George Henry ka3hsw at earthlink.net
Wed May 2 17:13:49 PDT 2007

----- Original Message ----- 
From: "Robert Bruninga" <bruninga at usna.edu>
To: <sarex at AMSAT.Org>
Sent: Wednesday, May 02, 2007 11:06 AM
Subject: [sarex] Re: Future ISS amateur radio modes

>> Once the planned hardware is aboard and installed, having
>> each system dedicated to a specific operation will minimize
>> the need for mode changes and crew interaction.
> But this can only be true if all systems operate with clear
> isolation of all uplinks from all downlinks on separate bands.
> It is impossible to have independent systems operating with
> uplinks in the same band which may be used for downlinks.

The ISS is a sufficiently large mass of metal that tremendous same-band 
isolation should be achieveable by simply mounting antennas on opposite 
sides of the station, end-on with respect to each other (sort of like 
mounting an inverted vertical underneath another on a tower, but with a 
large metal object between them instead of just space...).  Correct?

George, KA3HSW

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