----- Original Message ----- From: "Robert Bruninga" bruninga@usna.edu To: sarex@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