[amsat-bb] Keps accuracy

Joe Fitzgerald jfitzgerald at alum.wpi.edu
Fri Jan 26 14:51:48 UTC 2018

Ray Hoad wrote:

>Thus weekly updates are completely adequate with one exception.
>The ISS is an example of an object that has the ability to
>change its orbit. Thus the TLEs for the ISS are updated more frequently.

Another motivation for frequent TLE updates for ISS is the narrow
beamwidths of dish antennas used for 2395 MHz HamTV.   Even without
orbital maneuvers ISS TLE accuracy can degrade enough to cause antenna
pointing problems within a week.

de KM1P Joe

More information about the AMSAT-BB mailing list