Re: Home Planet satellite inaccuracies

Zachary Antolak wrote:
> 
> I have been using Home Planet
> (http://fourmilab.ch/homeplanet/homeplanet.html) for a few days, and
> have noticed some inaccuracies with the satellite tracking. For
> example, the position of ISS (ZARYA).

[snip]

> Now, my questions: Why don't both the SATELITE.SAT and Celestrak data
> approximate the actual position of the ISS? How can I fix it so they
> do? Which data sets are more trustworthy/accurate: the default
> SATELITE.SAT or the sets from Celestrak? Is there a more accurate
> source for two-line element sets?

How recent are the TLEs that you are using? ISS undergoes frequently
orbital maneuvers, e.g. its height etc. Always use the very latest TLEs
with ISS and other LEO stats.

-- 
Larry Brash