PDS_VERSION_ID = PDS3 LABEL_REVISION_NOTE = "2004-05-04, R. Orosei, draft 2004-11-16, R. Orosei, rev. 2007-09-06, R. Noschese, rev. 2016-10-01, R. Orosei, rev." PRODUCT_ID = "DATASET.CAT" RECORD_TYPE = STREAM RELEASE_ID = 0001 REVISION_ID = 0000 OBJECT = DATA_SET DATA_SET_ID = "MEX-M-MARSIS-2-EDR-EXT1-V2.0" OBJECT = DATA_SET_INFORMATION DATA_SET_NAME = "MARS EXPRESS MARS MARSIS EXPERIMENT DATA RECORD EXTENSION 1 V2.0" DATA_SET_COLLECTION_MEMBER_FLG = "N" DATA_OBJECT_TYPE = "TABLE" START_TIME = 2005-12-01T00:56:40 STOP_TIME = 2007-10-31T18:56:55 DATA_SET_RELEASE_DATE = 2016-10-01 PRODUCER_FULL_NAME = "ROBERTO OROSEI" ARCHIVE_STATUS = "PRE PEER REVIEW" DETAILED_CATALOG_FLAG = "N" DATA_SET_TERSE_DESC = "This data set contains the CODMAC Level 2 MARSIS data for the Mars Express mission" ABSTRACT_DESC = "This dataset contains the scientific telemetry produced by the MARSIS instrument after editing for duplicated and corrupted packets, together with geometric information computed on ground to locate observations in space and time. Both subsurface and ionosphere sounding data are included in the dataset." CITATION_DESC = "Orosei, R., F. Cantini, M. Cartacci, A. Cicchetti and R. Noschese, MARS EXPRESS MARS MARSIS EXPERIMENT DATA RECORD EXTENSION 1 V2.0, MEX-M-MARSIS-2-EDR-EXT1-V2.0, ESA Planetary Science Archive, 2016." CONFIDENCE_LEVEL_NOTE = "Data quality in a data product label is indicated through the DATA_QUALITY_ID element, and measures the integrity of the telemetry stream from the instrument." DATA_SET_DESC = " 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 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 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 on-board processing. Processing ========== Level 1b processing starts by cleaning, merging and time-ordering 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 higher-level 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 relevant 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 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. EDR Data Products consist of two binary files, each of which contains a PDS binary TABLE object, and a single detached PDS label describing their structure. The first file, called Frame file (FRM) contains the instrument data proper, exactly in the same format (bit by bit) as they were produced by the instrument. Each frame corresponds to a record in the file, which is also a row in the PDS binary TABLE object into which frames are organised. The second file constituting an EDR is called a Geometry file (GEO), and contains one record, corresponding to one line of the PDS binary TABLE object into which data are organised, for every frame in the corresponding FRM file. Columns of the table contains the values of parameters describing the geometry of observation for the corresponding frame. Ancillary Data ============== No Ancillary data are provided. Coordinate System ================= Locations on the surface of Mars are expressed in planetocentric coordinates. Longitude increases to the East and is comprised in the range 0 - 360 degrees. Software ======== MARSIS data products can be read by the PDS software NASAView, which reads a PDS label and displays the associated image or table. Media/Format ============ The standard distribution format for the data is transfer through Internet from the Planetary Science Archive of ESA, which can be accessed at the following URL: http://www.cosmos.esa.int/web/psa/psa-introduction Confidence Level Overview ========================= This data set contains all data for the Mars Express MARSIS for the interval described above. Every effort has been made to ensure that all data returned by the spacecraft is included and that processing is accurate. Review ====== The MARSIS EDR data have been reviewed internally by the Mars Express MARSIS team prior to release to the PDS. The data set has been also peer reviewed by the PSA. Data Coverage and Quality ========================= All data in the stated interval are included, to the best of our knowledge and attempts to determine completeness. The instrument was operated only briefly during cruise for periodic instrument health. The late deployment of the MARSIS antenna allowed the start of science operations only six months before the end of the nominal mission. Data quality in a data product label is indicated through the DATA_QUALITY_ID element, and measures the integrity of the telemetry stream from the instrument. The permitted values of DATA_QUALITY_ID are the following: -1: percentage of corrupted data not available 0: no corrupted data 1: less than 2% corrupted data 2: less than 5% corrupted data 3: less than 10% corrupted data 4: more than 10% corrupted data Limitations =========== There are no known limitations at this time." END_OBJECT = DATA_SET_INFORMATION OBJECT = DATA_SET_TARGET TARGET_NAME = MARS TARGET_TYPE = PLANET END_OBJECT = DATA_SET_TARGET OBJECT = DATA_SET_TARGET TARGET_NAME = PHOBOS TARGET_TYPE = SATELLITE END_OBJECT = DATA_SET_TARGET OBJECT = DATA_SET_TARGET TARGET_NAME = "NON SCIENCE" TARGET_TYPE = SATELLITE END_OBJECT = DATA_SET_TARGET OBJECT = DATA_SET_HOST INSTRUMENT_HOST_ID = MEX INSTRUMENT_ID = MARSIS END_OBJECT = DATA_SET_HOST OBJECT = DATA_SET_REFERENCE_INFORMATION REFERENCE_KEY_ID = "PICARDIETAL2004" END_OBJECT = DATA_SET_REFERENCE_INFORMATION END_OBJECT = DATA_SET END