RE: USA-179/90027

From: Ted Molczan (
Date: Fri Feb 02 2007 - 12:30:13 EST

  • Next message: Bob Christy: "RE: USA-179/90027"

    Dale Ireland asked:
    > What is the policy regarding posting radio observations on SEESAT?
    SeeSat-L is devoted to visual observation; therefore, radio observations have
    not been welcome; however, I have long believed that radio observations that
    complement visual observation should be welcome. 
    Indeed, radio and visual observations are highly complementary for tracking.
    Using typical hobbyist equipment, visual observers are able to produce the most
    accurate positional data; however, they cannot observe in daylight or through
    Radio observers do not suffer those limitations, but they can only track
    satellites that transmit radio waves (or reflect those of other origin), in
    which case their observations of Doppler-shifted frequency plots, AOS/LOS times,
    and transmitter on/off times are highly valuable for orbital analysis.
    So, I am inclined to encourage some sharing of radio observations on SeeSat-L,
    that complement visual observations related to tracking and orbit determination.
    There is room for debate on this, but it should take place off-list, either on
    UseSat-L, or in regular e-mail.
    Ted Molczan
    Admin: SeeSat-L,
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