[amsat-bb] Re: Can Radio Amateur Stations support scientific space missions ?
G0MRF at aol.com
Sun Nov 28 01:29:58 PST 2010
In a message dated 28/11/2010 08:11:17 GMT Standard Time, pa3guo at upcmail.nl
One of the conclusions in the reports: a 12 element antenna works just
Did anyone do a similar experiment and has interesting feedback to share ?
You are doing a great job with tracking these new birds and relaying audio
on the internet. The one that looks really interesting is the NASA solar
sail cubesat. From what I read, nanosail-d will be ejected from a pod
within its host spacecraft anytime now. The telemetry from that experiment
will only last 12 days as it is powered by batteries. The rate of decay due to
the sail will be huge. 70 -120 days from 650km.
However, the problem for all of these new sats is a lack of TLEs on
spacetrack. We stand virtually no chance of tracking nanosail D with its large
decay rate if keps are not updated on a very regular basis.
For whatever reason NORAD (or whoever) have decided not to make them
publically available and going to 5 or so individual sites to download keps
isn't really viable. It's a shame because the students are not going to
receive anywhere near as much data as they normally would. Pity their professors
could not lobby to release the keps as normal. - Probably just one
individual needs a 'kick' in the right place.
Perhaps AMSAT needs to begin developing a method of generating its own keps
from AOS / LOS TCA times or perhaps if the satellite has a transponder,
from info from ranging experiments. Now, there's a nice project. Imagine a
box attached to your radio that has a display in km ! How cool would that be.
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