MEX MARSIS Experiment Data Record (EDR)
EDR – Experiment Data Record
Instrument: Mars Advanced Radar for Subsurface and Ionosphere Sounding
PDS Data Set ID (Nominal Mission): MEX-M-MARSIS-2-EDR-V2.0
PDS Data Set ID (Extended Mission 1): MEX-M-MARSIS-2-EDR-EXT1-V2.0
PDS Data Set ID (Extended Mission 2): MEX-M-MARSIS-2-EDR-EXT2-V1.0
PDS Data Set ID (Extended Mission 3): MEX-M-MARSIS-2-EDR-EXT3-V1.0
PDS Data Set ID (Extended Mission 4): MEX-M-MARSIS-2-EDR-EXT4-V1.0
PDS Data Set ID (Extended Mission 5): MEX-M-MARSIS-2-EDR-EXT5-V1.0
DOI: Mars Express DOI Overview Page
For more information about MARSIS EDR products, see the Data Set Catalog File.
The Mars Advanced Radar for Subsurface and Ionosphere Sounding (MARSIS) Experiment Data Record (EDR) data products contain 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. Any other spacecraft telemetry relevant for calibration and processing (e.g. temperature of the receiver) is also included.
MARSIS data are organized into groups of echoes called frames. A frame contains one or more echoes, with or without on-board 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 an 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 on-board processing.
EDR data products
|
Product Type |
Description |
|---|---|
|
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 * |
On-board–processed Subsurface Sounding data in Acquisition state, with geometry information |
|
E_SSx_TRK_CMP * |
On-board–processed Subsurface Sounding data in Tracking state, with geometry information |
*Where x stands for a number between 1 and 5.
MARSIS EDR products have the following file names:
E_<Orbit Number>_<Operative mode>_<Instrument state>_CMP_<Target>_<File type>.DAT
where:
Orbit Number = a five-digit number identifying an orbit according to rules defined by Mars Express mission control
Operative mode = SS1, SS2, SS3, SS4 or SS5
Instrument state:
ACQ = Acquisition
TRK = Tracking
Target = the body observed by MARSIS
M = Mars
P = Phobos
File type = the type of data file
F = frame file (FRM)
G = geometry file (GEO)
MARSIS data products can consist of up to two files each (plus a detached label). Frame files contain the data proper, while geometry files contain geometric information used to locate observations in space and time.