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NASA Space Science Data Coordinated Archive Header

LRO MOON MINI-RF 1 PACKETIZED DATA RECORD V1.0 (PDS)

NSSDCA ID: PSPG-00901

Availability: At NSSDC, Ready for Electronic Access

Description

This description was generated automatically using input from the Planetary Data System.

Data Set Overview

The Raw Packetized Data Records (PDRs) are in the form of raw binary telemetry in Consultative Committee for Space Data systems (CCSDS) packet format that have been extracted from frames downlinked from the instrument. PDRs have duplications removed and include any ancillary information needed to understand what is in a given packet. They are retained so that future researchers can reproduce the higher-level products if they so desire. These data will not be reformatted or processed further and are delivered to the PDS with detached minimal PDS labels. Because the higher-level products can be reprocessed as often as desired, there may be a one-to-many relationship a raw data product to a processed data product. Parameters ========== See individual SIS documents, which are located in the DOCUMENT directory, for detailed descriptions of each file contained in this data archive. Processing ========== A minimal PDS label accompanies each raw data file and gives only a high-level description of the content and format. Data ==== The formats of these packets are identical, but their contents differ. Each of these packets is composed of five segments: the CCSDS Primary Header which contains packet identification information, the CCSDS Secondary Header which contains the packet time stamp, the Science Header which contains associated metadata, the Science Data which contains the data samples, and a trailer (Other Data) which contains transmission information. Byte values are 8-bits long, Integer values are 32-bits long, short (integers) are 16-bits long, and floating point values are 32-bit IEEE numbers. These data only are provided in big-endian format. The science data are time-ordered and consist of Vertical (V) or Horizontal (H) polarization channel samples contained within a pulse. The packets will contain either H or V channel data, never both in the same packet. The V/H Channel Indicator flag in the Science Header indicates if the data are H or V channel. Data gaps in the derived products or breaks in the sequence count field in the primary CCSDS packet header would indicate missing packets. Please see documentation in the DOCUMENT directory for additional information on the data files and their format. These data are stored in the DATA/SAR/<orbit>/RAW directory on archival volumes. File names are described in MRFLRO_DP_SIS.PDF. Ancillary Data ============== Each raw 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. Housekeeping Data ================= Instrument housekeeping data is included with this data set. These data are provided in text files in comma separated value (CSV) spreadsheet-type format. Coordinate System ================= Raw 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.

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 LRO mission 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. These data are stored in the DATA/SAR/<orbit>/LEVEL1 directory on archival volumes. File names are described in MRFLRO_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.

Data Set Overview

The InSAR products are produced from continuous mode data acquisition. The Mini-RF Calibrated Data Archive is a time-ordered collection of calibrated Level 1 continuous mode images. This data set also contains stokes parameters files, polarization ratio files, a browse image, ancillary data, and calibration data. 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 continuous mode CDRs by ingesting the Level 0 PDRs and associated Level 0 ancillary files into the Vexcel(TM) SWATH processor. The data are created in single-look complex format with pixel spacing in the native sampling aspect ratios. 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 images in range and azimuth orientation with pixel values in beta naught, which have been radiometrically and polarmetrically calibrated. They are continuous mode Horizontal channel interferometry image strips. Each pixel is a complex number consisting of a 4-byte floating point real and 4-byte floating point imaginary part for a total of 8-bytes. 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/<orbit>/LEVEL1 directory on archival volumes. File names are described in LRO_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.

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 instrument during the LRO 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/<orbit>/LEVEL2 directory on archival volumes. File names are described in MRFLRO_DP_SIS.PDF. These products are map-projected calibrated single swath CDR image data. The science products produced from data collected from the lunar polar regions are in an oblique cylindrical projection. Those produced from more equitorial regions are in an equirectangular projection. 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, a circular polarization ratio image, a same-sense polarization image and an opposite-sense polarization image. The 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/<orbit>/LEVEL1 directory on archival volumes. File names are described in LRO_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 Overview

The Level 3 Burst mode data products are Derived Data Records (DDRs) generated from multiple Level 2 products. Four Level 3 mosaics are produced of each lunar pole (i.e., regions above 80 deg. latitude) per imaging opportunity. Unlike the lower-level products, these are composed of data sets collected during multiple acquisitions. 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 mosaics are produced manually by ingesting the Level 2 stokes parameters into the ISIS software provided by the Astrogeology branch of the USGS. A full PDS label accompanies each data file and gives a detailed description of the content and format. These products are generated using the ISIS software from the USGS. Data ==== These data are stored in the DATA/SAR/MOSAICS directory on archival volumes. File names are described in MRFLRO_DP_SIS.PDF. Every file in the directory has PDS label. Except for files in the root directory and in the CATALOG directories, the label is a separate file in the same directory with the same name but a LBL extension. Coordinate System ================= The mosaics are produced from Level 2 products which are oriented in reference 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.

These data are available on-line from the Planetary Data System (PDS) at:

http://pds-geosciences.wustl.edu/lro/lro-l-mrflro-4-cdr-v1/

Alternate Names

  • LRO MOON MINI-RF 4 CALIBRATED DATA RECORD V1.0
  • LRO MOON MINI-RF 4 INSAR CALIBRATED DATA REC V1.0
  • LRO MOON MINI-RF 5 MAP-PROJECTED CALIBRATED DATA REC V1.0
  • LRO MOON MINI-RF 5 POLAR MOSAIC CALIBRATED DATA REC V1.0
  • LRO-L-MRFLRO-1-PDR-V1.0
  • LRO-L-MRFLRO-4-CDR-INSAR-V1.0
  • LRO-L-MRFLRO-4-CDR-V1.0
  • LRO-L-MRFLRO-5-CDR-MAP-V1.0
  • LRO-L-MRFLRO-5-CDR-MOSAIC-V1.0

Discipline

  • Planetary Science: Geology and Geophysics

Additional Information

Spacecraft

Experiments

Questions and comments about this data collection can be directed to: Dr. David R. Williams

 

Personnel

NameRoleOriginal AffiliationE-mail
Dr. Ben BusseyData ProviderApplied Physics Laboratoryben.bussey@jhuapl.edu
Mr. Mike ReidGeneral ContactApplied Physics LaboratoryMike.Reid@jhuapl.edu
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