MEX-M-MARSIS-2-EDR-EXT7

Data Set Overview MARSIS Level 1b data products consist of the data produced by the instrument reconstructed from the scientific telemetry, sorted by instrument state and data type, and provided with spacecraft position, velocity and attitude information. Parameters MARSIS data are organized into groups of echoes called frames. A frame contains one or more echoes, with or without onboard processing. Each echo, depending on the kind of processing it underwent, is recorded either as a time series of signal samples, or as the complex spectrum of the signal itself produced by means of a FFT. Scientific data in a frame are complemented by a set of ancillary data, produced by the instrument and recording parameter values used in pulse transmission, echo reception and onboard processing. Processing Level 1b processing starts by cleaning, merging and timeordering the packets. Duplicate data are deleted, missing packets are padded out, and the data are organised by orbits. Data are then sorted by instrument data types and instrument modes, and provided with spacecraft position, velocity and attitude information. MARSIS Level 1b processing orders data in a useful way for the intended users (i.e. radar scientists) and applications (i.e. quick look to monitor hardware performance and higherlevel processing), altering and manipulating them as little as possible to avoid the risk of introducing errors and, at the same time, including all necessary information from all r^ant sources. Level 1b data are in scientifically useful form, i.e. individual spectra, but they are uncalibrated. Data The list of EDR data Products is: E_AIS Active Ionosphere Sounding data frames with geometry information E_CAL Data frames acquired in Calibration mode with geometry information E_RXO Data frames acquired in Receive Only mode with geometry information E_SSx_ACQ_CMP Onboardprocessed Subsurface Sound truncated!, Please see actual data for full te [truncated!, Please see actual data for full text]