PDS_VERSION_ID          = PDS3
RECORD_TYPE             = STREAM
OBJECT                  = TEXT
  PUBLICATION_DATE      = 2012-03-15
  NOTE                  = "N/A"
END_OBJECT              = TEXT

END

       Lunar Reconaissance Orbiter LOLA Instrument Science Data Archive
   DATA_SET_ID          = {"LRO-L-LOLA-2-EDR-V1.0",
                           "LRO-L-LOLA-3-RDR-V1.0",
                           "LRO-L-LOLA-4-GDR-V1.0",
                           "LRO-L-LOLA-5-SHADR-V1.0"}

                              AAREADME.TXT
                      21 March 2008 (original date)
                             Gregory A. Neumann
                       Goddard Space Flight Center


==============================================================================
INTRODUCTION
==============================================================================

This archive contains raw, reduced, and higher-level instrument altimetry data
acquired during Lunar Reconaissance Orbiter (LRO) spacecraft operations.
The observations are carried out using the Lunar Orbiter Laser Altimeter 
(LOLA) instrument.

The LOLA archive is stored on two volumes. Raw data are stored on this volume,
designated LROLOL_0XXX. Reduced and higher-level data are stored on the volume
designated LROLOL_1XXX.

Earth ranges are stored in Consolidated Ranging Data records on other volumes.
==============================================================================
VOLUME SET INFORMATION
==============================================================================

Each archive volume has the structure illustrated in the diagram
below. The INDEX directory notes the volume location of all files.

The primary LOLA data product is the Experiment Data Record (EDR).
The EDR files are binary files, for which the format is described
in the associated LBL files.

The DOCUMENT directory contains descriptions of the archive and file
formats. The instrument used to acquire the data is described in the file 
INST.CAT in the CATALOG directory.

The diagram below shows the organization of each volume, starting from
the root of the compact disc.

   root
    |
    |- AAREADME.TXT
    |- VOLDESC.CAT        Description of the contents of this volume
    |- ERRATA.TXT
    |
    |- BROWSE
    |
    |     |- BROWINFO.HTM   
    |     |- BROWINFO.LBL
    |     |- BROWINFO.TXT
    |     |- GDR_info    browse images for GDR files
    |     |     |- GDR_info/CYLINDRICAL  cylindrical projection
    |     |     |- GDR_info/POLAR        polar stereographic projection
    |     |- RDR_info    browse images for RDR files
    |     |     |
    |     |     |- LRO_CO_01  Commissioning Orbit 
    |     |     |- LRO_NO_01  Nominal Mission Phase 1
    |     |     |- LRO_NO_02  Nominal Mission Phase 2
    |     |     |  ...
    |     |     |- LRO_SM_01  Science Mission Phase 1
    |     |     |  ...
    |     |     |- LRO_SM_17  Science Mission Phase 17
    |
    |- CALIB
    |
    |     |- CALIBRPT.HTM
    |     |- CALIBRPT.LBL
    |     |- CALIBRPT.PDF
    |     |- calibrpt_files
    |
    |- CATALOG
    |     |
    |     |- CATINFO.TXT     Streamlined PDS catalog files
    |     |- DSMAP.CAT       Map projection info - cylindrical
    |     |- DSMAP_POLAR.CAT Map projection info - polar
    |     |- EDR_DS.CAT      Dataset information - experiment data record
    |     |- GDR_DS.CAT      Dataset description - gridded data products
    |     |- RDR_DS.CAT      Dataset description - gridded data products 
    |     |- SHADR_DS.CAT    Description - spherical harmonic dataset
    |     |- LOLAINST.CAT    
    |     |- INSTHOST.CAT   
    |     |- MISSION.CAT   
    |     |- PERSON.CAT      Relevant LOLA personnel
    |     |- REF.CAT         Reference list
    |
    |- DATA
    |     |
    |     |- LOLA_EDR    Experiment Data Record directory
    |     |     |
    |     |     |- LRO_CO_01  Commissioning Mission Phase
    |     |     |- LRO_NO_01  Nominal Mission Phase 1
    |     |     |- LRO_NO_02  Nominal Mission Phase 2
    |     |     |  ...
    |     |
    |     |- LOLA_RDR    Reduced Data Record directory
    |     |
    |     |     |- LRO_CO_01  Commissioning Mission Phase
    |     |     |- LRO_NO_01  Nominal Mission Phase 1
    |     |     |- LRO_NO_02  Nominal Mission Phase 2
    |     |     |  ...
    |     |
    |     |- LOLA_GDR    Gridded Data Records; topo,counts,slope,roughness
    |     |     |-CYLINDRICAL  Data in cylindrical map projection
    |     |     |    |-IMG     In IMG format
    |     |     |    |-JP2     In Jpeg 2000 format
    |     |     |-POLAR
    |     |     |    |-IMG     In IMG format
    |     |     |    |-JP2     In Jpeg 2000 format
    |     |
    |     |- LOLA_SHADR  Spherical Harmonic Data Record directory
    |
    |- DOCUMENT
    |     |
    |     |- DOCINFO.TXT  Overview of directory
    |     |- ARCHSIS.LBL  Software Interface Specification description
    |     |- ARCHSIS.HTM  Archive Volume description in HTML 4.0 text
    |     |- ARCHSIS.PDF  Archive Volume description in PDF-1.4 format
    |     |- EDRSIS.HTM   EDR data product description in HTML 4.0 text
    |     |- EDRSIS.PDF   EDR data product description in PDF-1.4
    |     |- EDRSIS.LBL   EDR Software Interface Specification description
    |     |- JP2INFO.TXT  Description of the JP2 file format
    |     |- RDRSIS.HTM   RDR data product description in HTML 4.0 text
    |     |- RDRSIS.PDF   RDR data product description in PDF-1.4
    |     |- RDRSIS.LBL   RDR Software Interface Specification description
    |
    |- EXTRAS
    |
    |     |- CELESTIA        Lunar texture map layer for Celestia
    |     |- EXTRINFO.TXT    Overview of directory
    |     |- GEOID           Maps of lunar geoid height
    |     |- ILLUMINATION    Permanently shadowed regions, solid angle of sky
    |     |- FRACTAL         Hurst exponents, Roughness coefficient maps
    |
    |- INDEX
    |     |
    |     |- INDXINFO.TXT    Overview of directory
    |     |- EDRINDEX.LBL    Label to EDRINDEX.TAB on EDR archive volume
    |     |- EDRINDEX.TAB    List of data products on EDR archive volume
    |     |- RDRINDEX.LBL    Label to RDRINDEX.TAB on RDR archive volume
    |     |- RDRINDEX.TAB    List of data products on RDR archive volume
    |     |- GDRINDEX.LBL    Label to GDRINDEX.TAB on GDR archive volume
    |     |- GDRINDEX.TAB    List of data products on GDR archive volume
    |
    |- LABEL
    |
    |     |- LABINFO.TXT    Overview of directory
    |     |- *.FMT          Detailed record descriptions
    |
    |- SOFTWARE
    |
    |     |- Linux_bin
    |     |- MacIntel_OSX_Leopard_bin
    |     |- MacIntel_OSX_SnowLeopard_bin
    |     |- MacPPC_OSX_Leopard_bin
    |     |- MacPPC_OSX_Tiger_bin
    |     |- SOFTINFO.TXT
    |     |- Windows_bin
    |     |- Windows_src
    |     |- bin
    |     |- doc
    |     |- src
    |     |- support
    |

==============================================================================
VOLUME FORMAT
==============================================================================

This file (AAREADME.TXT) and a PDS volume object definition
(VOLDESC.CAT) are included at the root level. The remaining directories at
the root level contain documentation, data files and detached PDS labels.

==============================================================================
FILE FORMAT
==============================================================================

All data files on the disc are accompanied by detached PDS labels, which
describe their contents.  PDS TEXT objects have attached labels.

Detached labels have the same file name as the data file except that the
label name has the suffix "LBL".

Detailed documentation on file structure is available for some file types
in Software Interface Specifications in the DOCUMENT directory.

Text files, including data files of ASCII text and all labels (*.LBL files),
are delimited with carriage-return (ASCII 13) line-feed (ASCII 10)
pairs at the end of each line.  Detached labels and text files
(*.TXT file names) have fixed length records of 80 bytes to facilitate
their use as either fixed-length record files or as stream files with
carriage-return line-feed delimiters.


==============================================================================
SOFTWARE
==============================================================================

Software for parsing the binary data files has been developed at
several institutions to support NASA flight projects.  Because parsing must
be done at the bit level and the code is usually written for a narrow
platform-specific application, only limited software is provided.
The software is available from the PDS Geosciences Node,
pds-geosciences.wustl.edu.

==============================================================================
ACKNOWLEDGMENTS
==============================================================================

At PDS the assistance of Ed Guinness, Susan Slavney, Betty Sword,
and Jennifer Ward was appreciated.

==============================================================================
DISCLAIMER
==============================================================================

Although considerable care has gone into making this volume set, errors
are both possible and likely.  Users of the data are advised to exercise the
same caution as they would when dealing with any other unknown data set.

Reports of errors or difficulties would be appreciated.
Please contact the person listed below.

==============================================================================
COGNIZANT PERSONNEL
==============================================================================

The person responsible for construction and release of
this volume set is Gregory A. Neumann, LOLA co-Investigator.

Gregory A. Neumann
Planetary Geodynamics, Code 698
NASA Goddard Space Flight Center
Greenbelt, MD 20771
Tel: 301-614-6026
FAX: 301-614-6015
Gregory.A.Neumann@nasa.gov