[amsat-bb] BY70-1

Nico Janssen hamsat at xs4all.nl
Fri Dec 30 13:14:41 UTC 2016

If you are still using yesterday's TLE set, then you will indeed find
that BY70-1 is now about half a minute earlier. The problem is that
the TLEs for this satellite are not stable yet in the first days after the
launch. The right value for e.g. the decay rate has not yet been
established. So for the time being you need to make sure you use the
most recent TLE set that is available.

By the way, the two SuperView satellites are now using their own
propulsion system to increase their altitude, preventing an early decay.
As BY70-1 does not have any propulsion, it is stuck in its low orbit.


On 30-12-16 13:42, PY5LF wrote:
> Hi
> We had a low pass over here minutes ago and i felt the keps BY70-1 are
> wrong .
> I start to hear 25 seconds before . Does anyone feels the same ?
> 73
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