PDS_VERSION_ID = PDS3 RECORD_TYPE = STREAM OBJECT = TEXT NOTE = "This data set contains C1XS/XSM data for the normal Mission Phase." PUBLICATION_DATE = 2009-10-22 END_OBJECT = TEXT END ==================================== NOTES =================================== This is the CODMAC level 4 (reformatted data record) dataset. ============================================================================== 1. Introduction ---------------- This dataset contains Chandrayaan-1 X-Ray Spectrometer (C1XS) data products. The C1XS instrument telemetry also provides the measurements from the X-ray Solar Monitor (XSM) sensor. Documentation is included as part of the dataset to allow users to better understand the C1XS instrument and its role in the Chandrayaan-1 mission to the moon. This documentation is included in the DOCUMENT directory. The data products are included in subdirectories of the DATA directory. The subdirectories containing data from the operations of the C1XS instrument use the following name format: ORBIT_nnnnn_TO_mmmmm, where nnnnn-mmmmm is the range of spacecraft lunar orbit numbers in the directory. A table of orbit numbers and their corresponding times is listed in the file ORBIT_TIMES.TXT in the DOCUMENT directory. 2. File Formats ---------------- This section provides a brief description of the files available on the C1XS archive volume. A complete description of each file format is available in the DOCUMENT/EAICD text on the archive volume. Text files (extension .TXT), document files (extension .ASC), catalog files (extension .CAT) and PDS detached label files (extension .LBL) all have stream record format including a carriage return (CR, ASCII 13) and linefeed (LF, ASCII 10) at the end of the record as delimiter. They all have maximum line lengths of 80 characters (including the CR and LF characters). The PDS labels in the C1XS Data Archive conform to PDS standards [Planetary Science Data Dictionary, 2001; PDS Standards Reference, 2009]. Data products (extension .TAB). All tabular data are formatted as ASCII TEXT files with COMMA DELIMITED fields (data columns). All tabular files are paired with a detached PDS LABEL file in the same directory or subdirectory that shares the same base file. See section 3 for an example. The data files were extracted from a raw binary formatted data stream. This raw binary data was processed to CODMAC level 2. The engineering telemetry stream has been processed to convert from raw data values to engineering units. The raw binary data as received from the spacecraft is not archived. Document files (DOCUMENT/file_name.ASC) always exist in ASCII TEXT format and are also present in PDF and HTML format. Documents that contain formatting and figures that cannot be rendered as ASCII text are provided as PDF files. The PDF (Portable Document Format) file is a proprietary format of Adobe Systems Incorporated a that can be viewed using the free Acrobat Reader software. 3. File Naming Convention -------------------------- Data products have the following naming convention: __Rnnnnn. Where: C1XS = instrument identifier = N (Normal Phase Operations) = PDS data type (E) = Instrument data type abbreviation (see below) Rnnnnn = is the spacecraft orbit number = extension, TAB for the data products, LBL for the detached label file. Instrument data types: HKD Housekeeping Data 001 C1XS Time Tagged Events (not used) 002 C1XS Low Count Spectrum (not used) XSM XSM Spectral Data 006 C1XS Compressed Low Count Spectrum (not used) CAX C1XS Auxiliary Data XAX XSM Auxilliary Data CZD Auxiliary Data Detector Means TTS Time Tagged, single pixel data TT3 Time Tagged, 3 pixel data HRS High resolution spectra Examples: C1XS_NEHKD_R00218.TAB C1XS_NEHKD_R00218.LBL 4. Volume Contents ------------------- FILE CONTENTS Top-Level directory | |- AAREADME.TXT The file you are reading | |- ERRATA.TXT Description of known anomalies and errors | present on this volume. | |- VOLDESC.CAT A description of the contents of this | archive volume in PDS format. | |- [CATALOG] A directory containing information about the | | C1XS dataset. | | | |- CATINFO.TXT Description of the files in the CATALOG | | directory. | | | |- DATASET.CAT PDS dataset catalog object. A description of | | the dataset, parameters, processing, data | | coverage and quality. cruise/lunar/ext TBD | | | |- INST.CAT PDS dataset catalog object. A description of | | the C1XS instrument. | | | |- INSTHOST.CAT PDS dataset catalog object. A description of | | the Chandrayaan-1 spacecraft. | | | |- MISSION.CAT PDS dataset catalog object. A description of | | the Chandrayaan-1 spacecraft. | | | |- PERSON.CAT PDS dataset catalog object. Information | | about those persons responsible for the C1XS | | instrument and dataset. | | | |- REF.CAT PDS dataset catalog object. Information | | about available reference materials for the | | mission and the C1XS instrument. | | | |- SOFTWARE.CAT PDS dataset catalog object. Information | about software included with this dataset. | | |- [DATA] A directory containing the data directories, | | grouped by orbit. | | | |- ORBIT_nnnnn_TO_mmmmm Data directory | | | |- ORBIT_.... .... | | |- [GEOMETRY] A directory containing the C1XS pointing | | information directories,grouped by orbit. | | | |- GEOMINFO.TXT Description of the files in the GEOMETRY | | directory. | | | |- FIELD_OF_VIEW_PIC.PNG A picture showing the various Geometry file | | parameters in a graphical manner | | | |- ORBIT_nnnnn_TO_mmmmm Data directory | | | |- ORBIT_.... .... | | |- [DOCUMENT] A directory containing document files | | relating to this dataset. | | | |- DOCINFO.TXT Description of the files in the DOCUMENT | | directory. | | | ... | | |- [CALIB] A directory containing calibration files | | for the data. | | | |- CALINFO.TXT Description of the files in the CALIB | | directory. | | | ... | | |- [SOFTWARE] A directory containing the software used for | | converting the level-2 data to level-4 data. | | | |- SOFTINFO.TXT Description of the files in the SOFTWARE | | directory. | | | ... | | |- [INDEX] A directory containing index files relating | to this dataset. | |- INDEXINFO.TXT Description of the files in the INDEX | directory. | |- INDEX.TAB Index of data files in the DATA directory. | |- INDEX.LBL PDS detached label describing the INDEX.TAB file. 5. Recommended Hardware and Software ------------------------------------ Or applicable SW Data Viewers: ESA/PSA http://www.rssd.esa.int/index.php?project=PSA NasaView http://pds.jpl.nasa.gov/tools/software_download.cfm QBTool Contact ESA for details Software Libraries/Utilities: READPDS http://pdssbn.astro.umd.edu/nodehtml/software.shtml PDS Tools package http://pds.jpl.nasa.gov/tools/software_download.cfm 6. Contact Information ----------------------- PI (UK) Manuel Grande m.grande@aber.ac.uk PI (India) Dr P Sreekumar pskumar@isac.gov.in Instrument Engineer Chris Howe chris.howe@stfc.ac.uk Instrument scientist Barry Kellet barry.kellett@STFC.AC.UK Archiving Santa Martinez Santa.Martinez@sciops.esa.int Harold Metselaar Harold.Metselaar@sciops.esa.int