[amsat-bb] [Fwd: Re: Helping track YES2]
dave at g4dpz.me.uk
Tue Sep 25 11:42:31 PDT 2007
There may be part of the YES2 / MASS project still operating, please
read the following. Any help would be appreciated.
-------- Original Message --------
Subject: Re: Helping track YES2
Date: Tue, 25 Sep 2007 19:08:21 +0200
From: Roger.Walker at esa.int
To: Neil.Melville at esa.int
CC: Age-Raymond.Riise at esa.int, A.R.Bonnema at isispace.nl,
david.johnson at blackpepper.co.uk, Fabio.De.Pascale at esa.int,
gb4fun at rsgb.org.uk, g.shirville at btinternet.com, howard at howardlong.com,
kk at karlos.dk, kresten at control.aau.dk, "Ubbels, W-J."
<W.J.Ubbels at tudelft.nl>, fabio at fabiolinux.com
The YES2 project very much appreciates the efforts of the GENSO community in
its attempts to search for and track MASS. We estimate that the battery life
would allow for about 10 hours of continuous telemetry transmission, so by
now we can assume that MASS is no longer functioning.
HOWEVER, the Fotino capsule should also be broadcasting data in orbit
next 4-5 days, so the YES2 project would like to request the assistance of
the GENSO community to search for and track Fotino.
We estimate the Fotino orbit to be similar to Foton-M3 but with a lower
perigee altitude of 230 km. Hence, we expect Fotino to be ahead of Foton-M3
in the ground track due to the slightly increased orbital period. Rough
estimations are for Fotino to advance ahead of Foton-M3 by about 1
orbit since capsule release on 07:22 Zulu today.
Fotino should be transmitting data bursts of 312 bits (lasting 35
milliseconds) every 5 seconds at a frequency of 437 MHz (frequency
26 kHz). Every data burst starts with a sync word EB 90 (hex) and looks
EB 90 XX XX XX C0 00 00 00 00 00 00 00 00 00 00 00 00 XX XX XX XX XX XX
XX XX XX XX XX XX RR RR
where XX bytes are not constant and the 2 last bytes (RR) the CRC
the previous 296 bits of data.
Data encoding is FSK, Manchester code.
Any help from GENSO in finding Fotino would be greatly appreciated.
Dr. Roger Walker
Project Manager (YES2, ESEO and ESMO)
Acting Head of Education Projects Activities Unit (LEX-EP)
Education Office, European Space Agency
Telephone: +31(0)71 565 3349 - Fax: +31(0)71 565 5590
ESTEC, Keplerlaan 1 - 2201 AZ Noordwijk - The Netherlands
25/09/2007 17:49 A.R.Bonnema at isispace.nl,
david.johnson at blackpepper.co.uk,
gb4fun at rsgb.org.uk,
g.shirville at btinternet.com,
kk at karlos.dk,
kresten at control.aau.dk,
W-J." <W.J.Ubbels at tudelft.nl>,
howard at howardlong.com
Roger Walker/estec/ESA at ESA,
Pascale/estec/ESA at ESA,
Riise/esoc/ESA at ESA
Re: Helping track YES2(Document
link: Roger Walker)
Hi again everybody,
Ok, I think that no-one heard anything on this pass. So perhaps the battery
is already dead, or the tether drag has moved the orbit enough to
By the next pass the battery will almost certainly be depleted, so I think
there is little point in any of you tracking it further.
Thank you very much for your help on this. I know that the project team
You can track the further status of YES2 on the ESA website:
http://www.esa.int/esaCP/SEMBBBC1S6F_index_0.html And also on the project
Kresten, thanks for being so quick off the mark.
Abe and Wouter, reliable as ever - you'd started before I even called...
Carlos, a star, thanks. I'm well aware that I still owe you presentation
material - I haven't been in ESTEC for more than 5 mins since the
but I will be soon.
Howard, Dave and Graham, sorry for disturbing you when you have other
pressing non-ham related things to attend to.
It was anyway a nice demonstration of the GENSO community and what we
I will send management a mail to that effect. I think >=3 stations with an
hours notice is pretty good! If only it were all automated already...
Many thanks again to all for trying.
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