Rosetta

13/11/2009 09:00GMT - Rosetta has just completed its final Earth swing by, and in the course of doing so, provided some excellent signals on S-Band, which were tracked by amateur-DSN enthusiasts.
Rosetta 1311090816
As can be seen in the above image, the Doppler plot clearly shows a curve, caused by acceleration of the space craft. The image below shows the S-Band signal complete with the sidebands containing the TT&C data.
Rosetta 1311090823
Here are a few FFT's of the Rosetta X-Band signal over the years. More detail will be added here soon!