Huygens relay link mystery fully unravelled
EUROPEAN SPACE AGENCY SCIENCE REPORT
Posted: February 4, 2001
The main purpose of the test is to acquire a complete data set that will allow to fully characterize the performances of the flight radio receivers. These data will be used to correlate their performances with those that were measured on the Engineering Model at ESOC and to verify and calibrate a detailed analytical receiver model.
In the past few months, significant progress has been made in understanding the performances of the Huygens radio receivers. A detailed analytical model of its bandwidth has been worked by ESA experts. This model has already been calibrated with the Engineering Model test results. The purpose of the in-flight test is to adjust the parameters in the model to make it match the performance of the flight receivers.
Preliminary results obtained during the past two days are encouraging. They provide a detailed characterization of the receiver and confirm the validity of the analytical model, for channel A and channel B. These results are preliminary and further adjustment of the data will be obtained after a detailed processing of the vast amount of data (1 gigabit per day) that is being returned. These maps are now used to isolate regions where more detailed investigation should be conducted over the remaining part of the test campaign.