sexta-feira, 24 de janeiro de 2014

Radio amateurs receive Rosetta signals

Radio amateurs receive Rosetta signals

James Miller G3RUH reports reception of the Rosetta spacecraft signal at a distance of 805 million km from Earth using the 20 metre dish at the Bochum amateur radio facility
On the AMSAT Bulletin Board (AMSAT-BB) James Miller G3RUH writes: 
Just a quick note about Rosetta X-band.  I checked it this morning from Bochum.
2014 Jan 21 [Tue] 0934 utc
AZ    172°
El    11°
R    805 Million km
CNR    25.5 dB(Hz)
QRG  8421.786900 MHz at the spacecraft
Rosetta is about 14 dB weaker than Stereo A/B.
The system at Bochum has a G/T approx 40 dB(1/K).

Bertrand Pinel F5PL, located near Castelnaudary, France, 65km from Toulouse, successfully tracked Rosetta on January 21, 2014 at 10:00 UT, using a 3.5m dish antenna, see 
http://blogs.esa.int/rosetta/2014/01/22/radio-amateur-diy-rosetta-tracking/
ESA Rosetta Blog
http://blogs.esa.int/rosetta/
ESA on Facebook 
https://www.facebook.com/EuropeanSpaceAgency
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