Mars Express

Update from 23rd December 2007 MEX was easily found with the aid of the SDR-14. Very strong carrier with a little doppler.



Update from 22nd April 2006 A strong pass of MEX, copied at 19:53GMT on 8419.926 and rising fast. Note that the FFT shows the carrier falling due to being received in CW mode.


Update from 15th April 2006 A nice pass from MEX, received on 8419.923 at 18:46GMT. FFT plot from spectran shows the nice signal strength. Mars and MEX are 165473058.6 miles away from Earth, with light taking 14.827335 minutes to get here.


Update from 23rd March 2006 Extreme Doppler on Mars Express, followed by an abrupt end to the signal, either its gone behind Mars or its commanded off. The centre frequency at the time was around 8419.939 and moving up in frequency very fast, around 100Hz per second.


Watching MEX again on the FFT and the signal strength is pretty good considering the range is now 145.1 million miles. That's over a 100 million miles further away than when I first copied a signal from the MRO. Interestingly, the signal stopped abruptly at 13:27:20, presume that the TX was commanded off, or the space craft went behind Mars.


Signal received from Mars Express on the 21st March 2007:

FFT's showing the signals received from Mars Express over the years are below: