PDS_VERSION_ID = PDS3
RECORD_TYPE = STREAM
SPACECRAFT_NAME = "MARS RECONNAISSANCE ORBITER"
TARGET_NAME = "MARS"
OBJECT = TEXT
INTERCHANGE_FORMAT = ASCII
PUBLICATION_DATE = 2007-05-25
NOTE = "MRO CONTEXT CAMERA EXPERIMENT
DATA RECORD LEVEL 0 V1.0"
END_OBJECT = TEXT
END
MRO CONTEXT CAMERA (CTX) EXPERIMENT DATA RECORD (EDR) ARCHIVE
Table of Contents
1. - INTRODUCTION
2. - DISK FORMAT
3. - FILE FORMATS
4. - DVD CONTENTS, DIRECTORY, AND FILE NAMING CONVENTIONS
5. - CONTACTS FOR MORE INFORMATION
1. INTRODUCTION
This digital video disk (DVD) contains part of the Context Camera
(CTX) Experiment Data Record (EDR) archive.
This DVD contains ancillary data files that support the CTX EDR
archive. These files include an index file ('index.tab') that
tabulates the contents of the DVD and gives useful ancillary
information, and documentation files. For more information on the
contents and organization of the DVD volume set refer to the "DVD
Contents, Directory, and File naming conventions" section of this
document.
The CTX EDR archive was compiled for the National Aeronautics and
Space Administration (NASA) by Malin Space Science Systems personnel
under the direction of Dr. Michael C. Malin, CTX Team Leader.
Dr. Kimberley D. Supulver was responsible for its compilation.
The image files are organized according to NASA's Planetary Data
System (PDS) standards. An image file is organized as a PDS
labeled file containing an "image object".
2. DISK FORMAT
This disk has been formatted so that a variety of computer systems
(e.g. IBM/PC compatible, Macintosh, Sun) may access the data.
Specifically, it is formatted according to the ISO 9660 level 1
Interchange Standard. For further information, refer to the ISO 9660
Standard Document: Reference Number ISO 9660-1988, 15 April 1988. The
extended attribute records (XAR) supported by the ISO are not used in
this volume series. The lack of XARs on a file only affects the
VAX/VMS user community. It will be necessary for VAX/VMS users to use
the VMS CONVERT utility to convert document and text files before they
can be satisfactorily accessed. VAX/VMS users can contact the PDS
Imaging Node for support of this CD.
3. FILE FORMATS
All document files and tables are stored as ASCII stream-record files.
In a stream-record file, records (lines of text) are separated by a
carriage-return <cr> and line-feed <lf> character sequence. The
<cr>/<lf> sequence marks the end-of-record and the start of a new
record. This organization works well for the Microsoft-DOS systems
because the <cr>/<lf> sequence is identically used on these systems.
On Macintosh systems, an end-of-record mark is simply a <cr>
character. Macintosh text editors can read and access these files,
but a special-character indicator (usually a "square box" character)
will mark the "extraneous" <lf> character at the beginning of each
line. On UNIX systems, an end-of-record mark is simply a <lf>
character. UNIX text editors can read and access these files, but a
special-character (usually a ^M sequence) indicator will mark the
"extraneous" <cr> character at the end of each line. File names with
extension "TAB", "LBL", "LAB", "TXT", and "CAT" are formatted as ASCII
stream-record files.
Tabular files are formatted so that they may be read directly into
many database management systems of various computers. All fields are
separated by commas, and character fields are enclosed in double
quotation marks ("). Character fields are left justified, and numeric
fields are right justified. The "start byte" and "bytes" values
listed in the labels that describe the tabular files do not include
the commas between fields or the quotation marks surrounding character
fields. The records are of fixed length, and the last two bytes of
each record contain the ASCII <cr>/<lf> characters. This scheme
allows a table to be treated as a fixed- length record file on
computers that support this file type and as a normal text file on
other computers.
PDS labels are object-oriented. The object to which the label refers
(IMAGE, TABLE, etc.) is denoted by a statement of the form:
^object = location
in which the carat character (^) indicates that the object starts at
the given location. In an embedded label, the CTX EDR archive uses
the form:
^object = n <BYTES>
where "n" points to the starting byte location of the object. (The
first byte in a file is designated as byte location 1.) For detached
labels (labels existing in their own file) the object location is
signified as:
^object = "file.nam"
In this form, the object of the label description exists in the file
named "file.nam". For a description of the PDS object label
specifications, consult JPL document D-7669.
4. CD CONTENTS, DIRECTORY, AND FILENAMING CONVENTION
The files on this CD are organized starting at the root or 'parent'
directory. Below the parent directory is a directory tree containing
data, documentation, and index files. In the table below directory
names are indicated by brackets (<...>), upper-case letters indicate an
actual directory or file name, and lower-case letters indicate the
general form of a set of directory or file names.
DIRECTORY/FILE CONTENTS
------------------- ------------------------------------------
<root>
|
|-AAREADME.TXT The file you are reading (ASCII Text).
|
|-ERRATA.TXT Description of known anomalies and errors
| present on the volume set (optional file).
|
|-VOLDESC.CAT A description of the contents of this
| DVD volume in a format readable by
| both humans and computers.
|
|-<CALIB> Directory for the calibration files.
| |
| |-CALINFO.TXT Description of files in <CALIB> directory.
| |
| |-CTXCAL.TXT Detailed instructions for calibrating
| | CTX images.
| |
| |-CTXDEC.TXT CTX decompanding table.
| |
| |-CTXFLAT.TXT CTX flattening table.
|
|-<CATALOG> Catalog Directory
| |
| |-CATINFO.TXT Describes Contents of the Catalog directory
| |
| |-DATASET.CAT Dataset description.
| |
| |-INST.CAT CTX instrument description.
| |
| |-INSTHOST.CAT Spacecraft description.
| |
| |-MISSION.CAT Mission description.
| |
| |-PERSON.CAT Contributors to this dataset.
| |
| |-REF.CAT References.
|
|-<DOCUMENT> Documentation Directory. The files in this
| | directory provide detailed information
| | regarding the CTX EDR archive.
| |
| |-DOCINFO.TXT Description of files in the DOCUMENT
| | directory.
| |
| |-CTXSIS.TXT Context Camera Software Interface
| | Specification document in text format.
| |-CTXSIS.PDF Context Camera Software Interface
| | Specification document in PDF format.
| |
| |-CTXSIS.LBL PDS label for CTXSIS.PDF.
| |
| |-ARCHSIS.PDF Archive Volume Software Interface
| | Specification document in PDF format.
| |
| |-ARCHSIS.LBL PDS label for ARCHSIS.PDF.
| |
| |-MRO_ARCH_PLAN.PDF MRO Archive Plan document in PDF format.
| |
| |-MRO_ARCH_PLAN.LBL PDS label for MRO_ARCH_PLAN.PDF.
| |
| |-CTX_2006JE002808.PDF CTX description document in PDF format.
| |
| |-CTX_2006JE002808.LBL PDS label for CTX_2006JE002808.PDF.
|
|-<INDEX> Directory for the image index files.
| |
| |-INDXINFO.TXT Description of files in <INDEX> directory.
| |
| |-INDEX.TAB Image Index table.
| |
| |-CUMINDEX.TAB Cumulative Image Index table for all volumes.
| |
| |-INDEX.LBL PDS label for IMGINDEX.TAB.
| |
| |-CUMINDEX.LBL PDS label for CUMINDEX.TAB.
|
|-<DATA> Image data files with attached PDS labels.
|
5. CONTACTS FOR MORE INFORMATION
For details regarding generation of the CTX EDR archive:
------------------------------------------------------------------
Dr. Michael C. Malin
Malin Space Science Systems
PO Box 910148
San Diego CA 92191
For overall content, design, and archive of the CTX EDR archive
as presented on this CD volume set:
----------------------------------------------------------
Dr. Kimberley D. Supulver
Malin Space Science Systems
PO Box 910148
San Diego CA 92191
6. ACKNOWLEDGEMENTS
We wish to thank the following people at MSSS for their invaluable
contributions to the production and review of these volumes: Mike
Caplinger, Joe Fahle, Bruce Cantor, Ken Edgett, Elsa Jensen, Scott
Davis, Jennifer Sandoval, Robert Zimdar, Liliya Posiolova, Leslie
Lipkaman, Brian Nixon, and Megan O'Connell.