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UHF weekend Jan 14-15 on ISS



This weekend (Jan 14-15 UTC) Bill McArthur plans to operate on the UHF band
exclusively. It is his desire to work all continents on the UHF band from
the International Space Station.

The frequency he will be using will be 437.55 simplex. Due to the high
Doppler effect on this band, one will need to operate split frequencies for
most of the pass. A very simplified chart showing memory assignment for
transmit and receive with 5 KHz spacing is below as an example .

Mem.     TX     -    RX
Ch A - 437.540 - 437.560  Acquisition of signal (AOS)
Ch B - 437.545 - 437.555
Ch C - 437.550 - 437.550  Time of closest approach (TCA)
Ch D - 437.555 - 437.545
Ch E  -437.560 - 437.540  Loss of signal (LOS)

Good Luck and 73,

Kenneth G. Ransom - N5VHO
ISS Ham Radio Project Engineer
Johnson Space Center
Houston, TX 

http://spaceflight.nasa.gov/station/reference/radio/
http://www.issfanclub.com/ 
http://oscar.dcarr.org/index.php
http://www.ariss.net/ 
http://www.amsat.org/amsat/archive/sarex/48hour/threads.html
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