[amsat-bb] AMSAT-OSCAR 85 TLEs

Nico Janssen hamsat at xs4all.nl
Sat Oct 10 20:31:21 UTC 2015


Hours after the launch of AO-85 (ex FOX-1A) the first TLEs for 8 of
the 13 launched Cubesates were published under GRACE 1 through 8.
I have not seen any updates since launch day.

Today around 18:00 UTC AO-85 was 29 s early compared to the TLE set for
GRACE 8, which is currently leading the group. AO-85 is 41 s early
compared to the TLE set for GRACE 2, that most people will be using now.

So either the early TLEs were not very accurate yet, or the TLEs for
AO-85 were not yet determined and therefore not available in the
initially measured batch. Let's hope we get updated TLEs for all 13
Cubesats soon.

BTW, there appears to be a small temperature drift on the downlink
signal frequency of AO-85 that may be noticable when using automatic
doppler correction.


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