Data Set Overview : The Mini-RF Calibrated Data Archive is a time-ordered collection of calibrated Level 1 SAR images collected by the Mini-RF instrument during the Chandrayaan-1mission to the Moon. They also contain stokes parameters files, polarization ratio files, 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 POC produces Level 1 SAR CDRs by ingesting the Level 0 EDRs and associated Level 0 ancillary files into the SAR processor (Level 0 data are intermediate products generated from raw (PDR) products. Level 0 data are not archived in PDS.). Calibration is applied. A full PDS label accompanies each data file and gives a detailed description of the content and format.  Data : The Level 1 CDRs are SAR images in range and azimuth orientation with pixel values in beta naught, which have been radiometrically and polarmetrically calibrated. Each cross-product image file contains simple lines of pixels. Each pixel consists of four 4-byte floating point numbers for a total of 16 bytes. The first two floating point numbers are the image intensity values for the horizontal (H) and vertical (V) channel receive. The second two numbers are the real and imaginary parts of the single complex number which gives the cross power intensity image between the H & V receive. H & V represent the complex amplitudes of the horizontal and vertically polarized backscatter respectively. An '*' represents a complex conjugate of H or V. The Level 1 products are the lowest level usable science data products.  All Level 1 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 1 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 : Each science product is accompanied by a text metadata file that contains the parameters that describe the state the instrument was in at the time of data collection and location and timing information about the data set. This file is referenced in the PDS label associated with the science data product.  Calibration Data : Calibration files produced by the Vexcel(TM) CalPro processor are included with the Level 1 data set. Consult the Mini-RF Calibration Plan included in the DOCUMENT directory of this archive and the MRF_INST.CAT file for details.  Coordinate System : Level 1 data products are not dependent on definition of a coordinate system.  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.

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.