MEX-M-MRS-1-2-3-MCO-0086

Data Set Overview The Mars Express (MEX) Radio Science (MaRS) Data Archive is a timeordered collection of raw and partially processed data collected during the MEX Mission to Mars. For more information on the investigations proposed see the MaRS User Manual MARSUSERMANUAL2004 in the MaRS DOCUMENT/MRS_DOC folder. This is a Global Gravity measurement covering the time 20040621T11:58:16.000 to 20040622T15:44:09.000. This data set was collected during the MEX Mission Comissioning Phase (MCO) during the first 6 months the spacecraft was in orbit around Mars. This is a measurement of the Global Gravity field of Mars. Global gravity measurements were typically done when Mars Express was around Apocenter. There were three types of scientific measurements conducted during MCO: Occultation, Bistatic Radar and Gravity where one has to distinguish between global gravity measurements which were conducted around apocenter and target gravity measurements which were conducted around pericenter over interesting geophysical structures. For more information see INST.CAT or the MaRS User Manual MARSUSERMANUAL2004. One exception are the data from the 20040123 (DOY 23/2004). This was not really a science measurement but rather a pure comissioning measurement. The so called TWODX procedure was supposed to assess the influence of telemetry on the background frequency noise after arrival at mars. The activity was planned with an Xband uplink and a dualfrequency X and Sband downlink for a length of three hours with One hour TM and RNG ON; 1100 1200 UT One hour TM and RNG OFF (pure carrier), 1200 1300 UT One hour of TM and RNG ON; 1300 1400 UT Data were recorded at ESA New Norcia ground station. Ranging was only for XBand available. Please note: Because of an anomaly with the star tracker, the telemetry was not switched off between 1200 and 1300 UT. !!!!!!!!!!!!!!!!!!!!!!!!!ATTENTION!!!!!!!!!!!!!!!!!!!! truncated!, Please see actual data [truncated!, Please see actual data for full text]