PDS_VERSION_ID = PDS3 RECORD_TYPE = STREAM OBJECT = TEXT PUBLICATION_DATE = 2021-03-23 NOTE = "AAREADME.TXT describes this volume." END_OBJECT = TEXT END Gravity Recovery and Interior Laboratory (GRAIL) Derived Gravity Data (LGRS RDR) Archive Volume ============================================================================ Introduction ============================================================================ This archive (GRAIL_1001) contains derived NASA Level-2 lunar gravitational field data, including Spherical Harmonics ASCII Data Records (SHADR), Spherical Harmonics Binary Data Records (SHBDR), and Radio Science Digital Map Products (RSDMAP). It also includes SPICE geometry and navigation kernels (SPK) created by the GRAIL SDS. The format and content of this and all GRAIL archive volumes are described in the GRAIL Archive Volume Software Interface Specification (ARCHSIS.PDF). The GRAIL Data Product Software Interface Specification (DPSIS.PDF) provides a detailed description of all GRAIL data products. These documents are located in the DOCUMENT directory. ============================================================================ Volume Format ============================================================================ The LGRS (Lunar Gravity Ranging System) RDR (Reduced Data Record) data are divided into 4 subdirectories based on product type: SHADR, SHBDR, RSDMAP, and SPK. The INDEX directory contains a listing of all of the data products included on the volume. The CATALOG directory contains PDS documentation describing the mission, spacecraft, instrument, and data set. Additional information on volume organization is given in the Archive Volume SIS (described above), and in the section 'Volume Contents' below. ============================================================================ File Formats ============================================================================ The data files on this volume are provided in binary format (extension .DAT, .SPK), ASCII format (extension .TAB), and image format (extension .IMG). Each data file is also accompanied by a detached PDS label file (extension .LBL), an ASCII file containing information describing the data file and data record format. Catalog files (extension .CAT) are provided in ASCII format. Document files describing the volume and the data are given in ASCII and PDF formats. Text files, including data files of ASCII text and all labels (*.LBL) and tables (*.TAB), are delimited with carriage-return (ASCII 13) and line-feed (ASCII 10) pairs at the end of each line. Note that while both label and catalog files are ASCII, some operating systems will not recognize the .LBL and .CAT extensions as ASCII types. It may be necessary to either remap these extensions as ASCII in the system or text browser, or else to open the files from within the text browser. The PDS program NASAView may be used to display most PDS-labeled data products: http://pds.jpl.nasa.gov/tools/nasa-view.shtml. Please note, however, that very small numbers will be displayed as zeros with this program. ============================================================================ Volume Contents ============================================================================ Directory Structure and Contents for LGRS RDR Archive Volume The following illustration shows the directory structure overview for the LGRS RDR archive volume, which bears the PDS-assigned volume ID GRAIL_1001. The LGRS RDR data are divided into 4 subdirectories based on product type: SHADR, SHBDR, RSDMAP, and SPK. |===================================================================| | | | GRAIL-L-LGRS-5-RDR-V1.0 (GRAIL_1001) | | | |===================================================================| | | | root | | | | | |- AAREADME.TXT | | |- ERRATA.TXT | | |- VOLDESC.CAT | | | | | |- [CATALOG] | | | |- CATINFO.TXT | | | |- MISSION.CAT | | | |- INSTHOST_A.CAT | | | |- INSTHOST_B.CAT | | | |- LGRS_A_INST.CAT | | | |- LGRS_B_INST.CAT | | | |- REF.CAT | | | |- PERSON.CAT | | | |- DSMAP.CAT | | | |- DSMAP_1200A.CAT | | | `- LGRS_RDR_DS.CAT | | | | | |- [DOCUMENT] | | | |- DOCINFO.TXT | | | |- ARCHSIS.HTM | | | |- ARCHSIS.PDF | | | |- ARCHSIS.LBL | | | |- DPSIS.HTM | | | |- DPSIS.PDF | | | |- DPSIS.LBL | | | |- [DPSIS_IMAGES] | | | | |- IMAGE001.JPG | | | | |- IMAGE002.JPG | | | | |- IMAGE003.GIF | | | | |- IMAGE004.JPG | | | | |- IMAGE005.GIF | | | | |- IMAGE006.JPG | | | | |- IMAGE007.JPG | | | | |- IMAGE008.JPG | | | | |- IMAGE009.JPG | | | | |- IMAGE010.JPG | | | |- 090_REVC_1.TXT | | | |- 090_REVC_1.PDF | | | |- 090_REVC_1.LBL | | | |- 0159_SCIENCE_L5.TXT | | | |- 0159_SCIENCE_L5.LBL | | | |- [0159_SCIENCE_L5_IMAGES] | | | | |- 0159_SCIENCE2_1.JPG | | | | |- 0159_SCIENCE2_2.JPG | | | | |- 0159_SCIENCE2_3.JPG | | | | |- 0159_SCIENCE2_4.JPG | | | | |- 0159_SCIENCE2_5.JPG | | | | |- 0159_SCIENCE2_6.JPG | | | | |- 0159_SCIENCE2_7.JPG | | | |- 0161_TELECOMM_L5_8.TXT | | | |- 0161_TELECOMM_L5_8.PDF | | | |- 0161_TELECOMM_L5_8.LBL | | | |- 0171_TELECOMM_NJPL_L5.TXT | | | |- 0171_TELECOMM_NJPL_L5.PDF | | | |- 0171_TELECOMM_NJPL_L5.LBL | | | |- 0172_TELECOMM_CHDO_REVE_L5.TXT | | | |- 0172_TELECOMM_CHDO_REVE_L5.LBL | | | |- ATBD.PDF | | | |- ATBD.HTM | | | |- [ATBD_IMAGES] | | | | |- IMAGE001.PNG - IMAGE052.PNG | | | |- ATBD.LBL | | | |- BLACKJACKDLP.TXT | | | |- BLACKJACKDLP.PDF | | | |- BLACKJACKDLP.LBL | | | |- DSN006_MEDIALCAL_REV2.HTM | | | |- DSN006_MEDIALCAL_REV2.LBL | | | |- FORTNIGHT_CALCULATION.HTM | | | |- FORTNIGHT_CALCULATION.PDF | | | |- FORTNIGHT_CALCULATION.LBL | | | |- GPA_TD_D_71987_REVE.TXT | | | |- GPA_TD_D_71987_REVE.PDF | | | |- GPA_TD_D_71987_REVE.LBL | | | |- GRAIL_TIMING.HTM | | | |- GRAIL_TIMING.PDF | | | |- GRAIL_TIMING.LBL | | | |- [GRAIL_TIMING_IMAGES] | | | | |- GRAIL_TIMING_0.JPG | | | | |- GRAIL_TIMING_1.JPG | | | | |- GRAIL_TIMING_2.JPG | | | | |- GRAIL_TIMING_3.JPG | | | |- LIB_10_GRAIL_COORD_TRANS_REV1.TXT | | | |- LIB_10_GRAIL_COORD_TRANS_REV1.PDF | | | |- LIB_10_GRAIL_COORD_TRANS_REV1.LBL | | | |- NAV023_ODF_2_18_REV3.HTM | | | |- NAV023_ODF_2_18_REV3_FIG2_1.JPG | | | |- NAV023_ODF_2_18_REV3.LBL | | | |- ONCE_UPON_A_FORTNIGHT.TXT | | | |- ONCE_UPON_A_FORTNIGHT.PDF | | | |- ONCE_UPON_A_FORTNIGHT.LBL | | | |- RSDMAP.HTM | | | |- RSDMAP.LBL | | | |- SHADR.HTM | | | |- SHADR.LBL | | | |- SHBDR.HTM | | | |- SHBDR.LBL | | | |- SPK_MM_SIS.HTM | | | |- SPK_MM_SIS.LBL | | | |- T2_24_L5.HTM | | | |- T2_24_L5.LBL | | | |- [T2_24_L5_IMAGES] | | | | |- T2_24_IMG_0.JPG | | | | |- T2_24_IMG_1.JPG | | | | |- T2_24_IMG_2.JPG | | | |- TNFSIS.TXT | | | |- TNFSIS.LBL | | | |- TRACKINGDATAMESSAGESTANDARD.TXT | | | |- TRACKINGDATAMESSAGESTANDARD.PDF | | | |- TRACKINGDATAMESSAGESTANDARD.LBL | | | |- TRK_2_21_950831.TXT | | | `- TRK_2_21_950831.LBL | | | | | |- [INDEX] | | | |- INDXINFO.TXT | | | |- INDEX.LBL | | | `- INDEX.TAB | | | | | |- [CALIB] | | | |- CALINFO.TXT | | | |- GRAILCOMPONENTS.TXT | | | `- GRAILCOMPONENTS.LBL | | | | | |- [SHADR] | | | | | |- [SHBDR] | | | | | |- [RSDMAP] | | | | | |- [SPK] | | | | | `- [EXTRAS] | | | |- EXTRINFO.TXT | | | |- [COVARIANCE] | | | | |- *_COEFFICIENTS.ASC | | | | |- *_COEFFICIENTS.TXT | | | | |- *_COVARIANCE.ASC | | | | |- *_COVARIANCE.TXT | | | |- [CLONES] | | | | |- [GGGRX_0900C_CLONES_0001_0100] | | | | |- [GGGRX_0900C_CLONES_0101_0200] | | | | |- [GGGRX_0900C_CLONES_0201_0300] | | | | |- [GGGRX_0900C_CLONES_0301_0400] | | | | |- [GGGRX_0900C_CLONES_0401_0500] | | | | |- CLONE_DESCRIPTION.PDF | | | | |- CLONE_DESCRIPTION.LBL | | | |- [GEOTIFF] | | | | |- GGGRX_1200A_*.TIF | | | | |- GGGRX_1200L_*.TIF | | | | |- GGGRX_1200L_*.TIF.AUX.XML | | | | |- GRGM1200L_DESCRIPTION.TXT | | | `- FORTNIGHT_CALCULATION.XLS | |===================================================================| Directory Contents: Directory This is the top-level directory of the data volume. The following are files contained in the root directory. AAREADME.TXT: (This file) General information file. Provides users with information about the LGRS RDR data products. Directs user to other documents on the volume containing more detailed information. VOLDESC.CAT: PDS file containing the VOLUME object definition. This gives a high level description of the contents of the volume. Information includes: production date, producer name and institution, volume ID, etc. ERRATA.TXT: Text file for identifying and describing errors and/or anomalies found in the current volume, and possibly previous volumes of a set. Any known errors for the associated volume will be documented in this file. This includes revised RDRs meant to replace RDRs in a previous PDS delivery. Directory This subdirectory contains the catalog object files for the entire volume. The following files are included in the catalog subdirectory. CATINFO.TXT: Catalog directory description. MISSION.CAT: GRAIL mission information. INSTHOST_A.CAT: GRAIL-A spacecraft information. INSTHOST_B.CAT: GRAIL-B spacecraft information. LGRS_A_INST.CAT: LGRS-A instrument information. LGRS_B_INST.CAT: LGRS-B instrument information. LGRS_RDR_DS.CAT: LGRS RDR dataset information. DSMAP.CAT: RSDMAP simple cylindrical map projection information. DSMAP_1200A.CAT: GRGM1200A RSDMAP simple cylindrical map projection information. REF.CAT: References mentioned in other *.CAT files. PERSON.CAT: Personnel information (Team and PDS personnel responsible for generating the archive). Directory This subdirectory contains the documentation that will be needed in order to understand and analyze the data. Each data set contains the document collection for the entire archive; not all documents are necessary for understanding every data set. Files are stored in PDF and ASCII formats. DOCINFO.TXT: Identifies and describes the function of each file in the DOCUMENT directory. Please see this file for the full document list. Directory This subdirectory contains the indices for the LGRS RDR data products. The following files are contained in the index subdirectory. INDXINFO.TXT: Identifies and describes the function of each file in the index subdirectory. This includes a description of the structure and contents of each index table in the subdirectory and usage notes. INDEX.TAB: The index file is organized as a table; there is one entry for each of the data files included in the LGRS RDR data set; the columns contain parameters that describe the data as well as instrument and spacecraft parameters. INDEX.LBL: Detached PDS label for INDEX.TAB. Directory The CALIB directory contains one file detailing spacecraft properties such as dimensions and reflectivity. CALINFO.TXT: Description of calibration directory files. GRAILCOMPONENTS.TXT: Abstract of a paper describing the spacecraft bus component model with dimensions and orientations, as well as the specular/diffuse reflectivity properties of the spacecraft components. Points to online published paper. GRAILCOMPONENTS.LBL: PDS label that describes GRAILCOMPONENTS.TXT. Data Directory Data Directory Data Directory Data Directory These subdirectories contain Spherical Harmonics ASCII Data Records (SHADR), Spherical Harmonics Binary Data Records (SHBDR), Radio Science Digital Map Products (RSDMAP), and SPICE geometry and navigation kernels (SPK). See DPSIS.PDF for more information. Directory This directory contains ancillary material that may be useful but is not required for the understanding of the archive. EXTRINFO.TXT: Identifies and describes the function of each file in the EXTRAS directory. Please see this file for a list of directory contents. ============================================================================ Errata ============================================================================ Every effort has been made to ensure that the data and documentation are of the best possible quality. However, all users are encouraged to verify the correctness of the data prior to submitting any publications or other work based on these data. The file ERRATA.TXT at the root level of this volume contains a list of known deficiencies or caveats associated with data on this volume at the time it was published, if any. It also lists any revisions that have been made to the data set as a whole or to individual products. If you find an error on this volume, please report the error to the PDS Geosciences Node at geosci@wunder.wustl.edu. ============================================================================ Contacts ============================================================================ For questions concerning these data products and documentation, contact: PDS Geosciences Node Washington University Dept. of Earth and Planetary Sciences 1 Brookings Drive St. Louis, MO 63130 314-935-5493 WWW Site: http://pds-geosciences.wustl.edu Electronic mail address: geosci@wunder.wustl.edu For questions regarding PDS Standards or other archive volumes available from the PDS, please contact PDS Operator at the PDS Central Node (at JPL): Internet pds_operator@jpl.nasa.gov Telephone (818) 354-4321 U.S. Mail Planetary Data System, PDS Operator Jet Propulsion Laboratory Mail Stop 202-101 4800 Oak Grove Dr. Pasadena, CA 91109-8099