PDS_VERSION_ID = PDS3 LABEL_REVISION_NOTE = "K. Murray, 2015-01-01" RECORD_TYPE = STREAM OBJECT = DATA_SET DATA_SET_ID = "ODY-M-THM-5-VISGEO-V2.0" OBJECT = DATA_SET_INFORMATION DATA_SET_NAME = "ODYSSEY THEMIS VIS GEO V2.0" DATA_SET_COLLECTION_MEMBER_FLG = "N" START_TIME = "2002-02-19T18:59:36.689" STOP_TIME = "UNK" DATA_OBJECT_TYPE = QUBE DATA_SET_RELEASE_DATE = "2002-10-01 PRODUCER_FULL_NAME = "PHILIP R. CHRISTENSEN" DETAILED_CATALOG_FLAG = "N" ARCHIVE_STATUS = "IN QUEUE" CITATION_DESC = " Christensen, P.R., ODYSSEY THEMIS VIS GEO V2.0, ODY-M-THM-5-VISGEO-V2.0, Mars Odyssey THEMIS Projected Products, NASA Planetary Data Systems, 2002." DATA_SET_TERSE_DESC = "2001 ODY THEMIS VIS GEO Data Records" ABSTRACT_DESC = " The THEMIS VIS-GEO data set contains the spatially registered, visible images derived from the calibrated radiance (VIS-RDR) products. Each image file is accompanied by a detached PDS label describing the data format, contents, and processing history." DATA_SET_DESC = " Data Set Overview ================= The THEMIS VIS-GEO data set contains the spatially registered, visible images derived from the calibrated radiance (VIS-RDR) products. Each image file is accompanied by a detached PDS label describing the data format, contents, and processing history." The VIS-GEO data set is one of several associated data sets included on the Mars Odyssey THEMIS Projected Products volume. These data sets are derived from THEMIS calibrated radiance products (RDR) and include the spatially registered, radiance products and various other derived products. One or more map projections of each radiance product is provided in the GEO data set, with each projection stored in a single ISIS-3 CUBE image file and associated with a detached PDS ASCII label. Derived (PBT and ALB) data sets are stored with each observation in a standard PDS IMAGE file. Modification History ==================== Version 1 data volumes that include the VIS-GEO data set are ODTGEO_10001 through ODTGEO_10047, released between Jan 2003 and April 2014. The release of Version 2 data volumes began in July 2014, with the re-release of previously released volumes following shortly thereafter. Version 2 supersedes version 1 and was necessitated by significant improvements to the ISIS software used to generate all THEMIS projected products. This includes, but is not limited to, a new THEMIS IR camera model which improves the band-to-band registration of projected products. Additional details are discussed in the ERRATA.TXT file available on the volume with this data set. Data ==== The THEMIS instrument is a combined thermal infrared (IR) and visible (VIS) multispectral, pushbroom imager. The IR and VIS detector arrays are co-aligned, allowing, if desired, the simultaneous observation of the same Mars surface location with each detector. The Mars Odyssey THEMIS Standard Products volume includes the calibrated data sets (IR-RDR and VIS-RDR); however, these products are not spatially registered and bands within a single image can be offset by as much as 10 lines and/or columns. The cartographic conversion of the THEMIS observations using the ISIS-3 software results in one projection per each multispectral ISIS-3 CUBE file. A standard ISIS-3 CUBE includes a binary image, an ASCII header label, header data tables (optional), and an ASCII footer listing the file processing history. A detached, ASCII label is associated with each THEMIS GEO product, duplicating the information attached to the image data, and conforming to PDS standard formats. In addition to the projection, the generation of the THEMIS GEO products includes multiple processing steps which may invalidate the calibrated radiance values inherited from the source RDR product. The IR-GEO products are atmospherically corrected calibrated radiance, making them ideal for use in spectroscopic surface studies. A single band, usually band 9 (12.57 um), is further processed to generate the IR-PBT single band, PDS IMAGE files. The VIS-GEO products are cosmetically filtered after projection, making them ideal for use with other projected Mars imagery data sets. The projected visible albedo product (VIS-ALB) is generated from a single band of the VIS-RDR, usually band 3 (0.654 um), and the resulting albedo values compare favorably with albedo measurements from the Mars Global Surveyor TES instrument. For more details of the THEMIS geometric processing algorithms and the data product formats, please refer to the Mars Odyssey THEMIS: Geometric Processing User's Guide (CHRISTENSEN2014b) included with this data set archive. Coordinate System ================= All projected products on this volume are generated using the appropriate Odyssey SPICE kernels and a THEMIS specific model in the ISIS software. All projections are based on the Mars IAU 2000 aerocentric model with east positive longitude. Image specific map projection details are stored in the label of each image file. Software ======== The GEO data products on this volume are ISIS-3 standard CUBE files. ISIS is an image processing package produced by USGS-Flagstaff and available at http://isis.astrogeology.usgs.gov. The PBT and ALB data products on this volume follow the standards for the PDS IMAGE file structure. Any software tool that understands that structure should be able to open and manipulate them. The THEMIS team uses the software tool DAVINCI to display and analyze all the data products. DAVINCI is a data analysis package for working with multi-spectral and PDS standard images; it is distributed by the ASU Mars Space Flight Facility and is available at http://davinci.asu.edu. Media/Format ============ The publication and distribution of this data set will be facilitated online through the THEMIS Data Node (http://static.mars.asu.edu/pds). Due to the large volume of data products expected from the mission, physical copies of the data will be made for PDS long-term archive purposes only." CONFIDENCE_LEVEL_NOTE = " Please refer to the Mars Odyssey THEMIS: Geometric Processing User's Guide (CHRISTENSEN2014b), which is included with this data set archive." END_OBJECT = DATA_SET_INFORMATION OBJECT = DATA_SET_TARGET TARGET_NAME = MARS END_OBJECT = DATA_SET_TARGET OBJECT = DATA_SET_MISSION TARGET_NAME = "2001 MARS ODYSSEY" END_OBJECT = DATA_SET_MISSION OBJECT = DATA_SET_HOST INSTRUMENT_HOST_ID = ODY INSTRUMENT_ID = THEMIS END_OBJECT = DATA_SET_HOST OBJECT = DATA_SET_REFERENCE_INFORMATION REFERENCE_KEY_ID = "CHRISTENSEN2014b" REFERENCE_DESC = " Mars Odyssey THEMIS: Geometric Processing User's Guide, P. R. Christensen, July 2014." END_OBJECT = DATA_SET_REFERENCE_INFORMATION END_OBJECT = DATA_SET