On Wed, Mar 19, 2014 at 09:28:38PM -0700, nuts wrote:
> A lot of these satellites have "footprints" for each antenna. I don't
> know if the footprints are narrow enough to track a plane.
I do believe there is an time offset for each aircraft sent on
the forward control channel from the ground (which is shared with many
aircraft) that allows a particular aircraft to transmit a frame in the
center of its allocated slot. IIRC the ground measures the error and
sends a correction to the plane which allows the plane's transceiver to
compute just when - relative to the system frame timing derived from the
received forward control channel from the satellite - it should
transmit the reverse control channel burst.
--
Dave Emery N1PRE/AE, d...@dieconsulting.com DIE Consulting, Weston, Mass
02493
"An empty zombie mind with a forlorn barely readable weatherbeaten
'For Rent' sign still vainly flapping outside on the weed encrusted pole - in
celebration of what could have been, but wasn't and is not to be now either."
_______________________________________________
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.
