Data Set Information
DATA_SET_NAME CH1-ORB MOON MINI-RF 5 MAP-PROJ CALIBRATED DATA REC V1.0
DATA_SET_ID CH1-ORB-L-MRFFR-5-CDR-MAP-V1.0
NSSDC_DATA_SET_ID
DATA_SET_TERSE_DESCRIPTION
DATA_SET_DESCRIPTION Data Set Overview : The Mini-RF Calibrated Data Archive is a time-ordered collection of calibrated Level 2 SAR images collected by the Mini-RF (Mini-SAR) instrument during the Chandrayaan-1 mission to the Moon. They are provided in an oblique cylindrical map projection. They also contain stokes parameters files, polarization ratio files, a radar albedo file, and a browse image. Please see documentation in the DOCUMENT directory for additional information on the data files and their format. Parameters : See individual SIS documents, which are located in the DOCUMENT directory, for detailed descriptions of each file contained in this data archive. Processing : The Level 2 burst mode data products are CDRs that the POC produces by ingesting the Level 1 CDRs into the Level 2 SAR processor. The Level 2 CDRs differ from the Level 1 products in that they are orthorectified and are re-sampled into oblique cylindrical map projections. The 'equator' of the map projection will correspond to the line of longitude that the subspacecraft point crossed at the equator before the data collection. A full PDS label accompanies each data file and gives a detailed description of the content and format. Data : These data are stored in the DATA/SAR//LEVEL2 directory on archival volumes. File names are described in MRFFR_DP_SIS.PDF. These products are map-projected calibrated single swath CDR image data. The science product in an oblique cylindrical projection. There is one file for north polar pass and another for the south polar pass. Each pixel is represented by two 4-byte floating point values and an 8-byte complex value (one 4-byte floating point real and one 4-byte floating point imaginary value) for a total of 16 bytes per pixel. The first two numbers are the intensity images for H and V receive, respectively. The complex value is the cross power intensity image between the H & V receive. All Level 2 CDR image products are each accompanied by four stokes parameters files. Mini-RF transmits a right circular polarized signal, and receives Horizontal and vertical polarized signals, and the phase between the polarizations. The Level 2 file consists of four pieces of information per pixel. The received power on the horizontal polarization (ERH), the received power in the vertical polarization (ERV) and the real and imaginary portions of the cross product between the two polarization signals (Re ERH ERV* & Im ERH ERV* ). The four stokes parameters (S1, S2, S3, and S4) are related to the data in the level 1 files by the following equations: S1 : ERH + ERV S2 : ERH - ERV S3 : 2 Re ERH ERV* S4 : -2 Im ERH ERV* These data are stored in the DATA/SAR//LEVEL1 directory on archival volumes. File names are described in MRFFR_DP_SIS.PDF. Ancillary Data : An extensive set of ancillary files is needed for proper analysis and interpretation of the derived data. Users should refer to the INDEX.TAB listing to locate ancillary files and to the Mini-RF data product SIS for data formats and naming conventions. Coordinate System : The lunar body-fixed frame used by the Mini-RF investigation is referenced to the Moon Principle Axis (PA) coordinate system, as realized using NASA's SPICE products (Frames Kernel). Software : No software is included with this archival data set. Media/Format : These products are delivered on a hard-drive or by ftp and not on a specific formatted medium.
DATA_SET_RELEASE_DATE 3000-01-01T00:00:00.000Z
START_TIME 2008-01-01T12:00:00.000Z
STOP_TIME N/A (ongoing)
MISSION_NAME CHANDRAYAAN-1
MISSION_START_DATE 2008-10-22T12:00:00.000Z
MISSION_STOP_DATE 2009-08-28T12:00:00.000Z
TARGET_NAME MOON
TARGET_TYPE SATELLITE
INSTRUMENT_HOST_ID CH1-ORB
INSTRUMENT_NAME MINI-RF FORERUNNER
INSTRUMENT_ID MRFFR
INSTRUMENT_TYPE RADAR
NODE_NAME Geosciences
ARCHIVE_STATUS LOCALLY_ARCHIVED
CONFIDENCE_LEVEL_NOTE Overview : Data in this data are collected from orbits around the Moon. Review : This archival data set was reviewed by the Mini-RF Team prior to submission to the Planetary Data System (PDS). Prior to creation of the final version of the archival data set, key elements of the archive were distributed for preliminary review. These included electronic versions of example PDS labels, CATALOG files, and Software Interface Specifications. These materials were distributed to PDS personnel, the experiment investigator, and others, as appropriate. Data Coverage and Quality : The coverage on each archival volume is associated with the orbit number.
CITATION_DESCRIPTION Chandrayaan-1 Forerunner Calibrated Level 2 Data Set V1.0, CH1-ORB-L-MRFFR-5-CDR-MAP-V1.0, NASA Planetary Data System, 2009.
ABSTRACT_TEXT This data set contains archival map-projected calibrated data acquired from the Mini-RF (Mini-SAR) Forerunner instrument during the Chandrayaan-1 mission and associated ancillary data.
PRODUCER_FULL_NAME MINI-RF POC
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