PDS_VERSION_ID = PDS3 RECORD_TYPE = STREAM SPACECRAFT_NAME = "INFRARED ASTRONOMICAL SATELLITE" INSTRUMENT_NAME = "FOCAL PLANE ARRAY" SPACECRAFT_ID = "IRAS" INSTRUMENT_ID = "FPA" OBJECT = TEXT NOTE = "Introduction to IRAS Images and Photometry of comet 9P/Tempel 1" PUBLICATION_DATE = 2003-05-29 END_OBJECT = TEXT END ***** File AAREADME.TXT Overview ======== This data set collection contains Infrared Astronomical Satellite (IRAS) images and photometry of comet 9P/Tempel 1 during its 1983 apparition. The collection contains 3 types of IRAS data as supplied by Russell Walker: - Additional (Pointed) Observations: Reprocessed images and photometry tables - Survey Scans: Reprocessed images and photometry tables - Sky Survey Atlas, Reject Files: Unprocessed images showing the dust trail of the comet The collection includes calibration files, ephemeris files, and processing logs as supplied by Russell Walker. This data set collection supports analysis of 9P/Tempel 1 for the NASA Deep Impact Mission. IRAS Additional Observations (AO) ================================= For these data, IRAS was aimed at comet 9P/Tempel 1 and images were acquired by the Focal Plane Array (FPA), a multi-wavelength detector (12, 25, 60, and 100 microns). Russell Walker combined Tempel 1 images by satellite operations plan number and reduced these data to radiance and noise map images (/DATA/AO/IMAGES/). Using these images, Russell Walker performed photometry of the coma and produced radiance photometry and noise tables (/DATA/AO/PHOT/). An extensive discussion of these data was provided by Russell Walker and is included on this volume (/DOCUMENT/EXP_SUPP_AO.*). IRAS Survey Scans ================= Most of the IRAS observation time was spent in survey mode. Russell Walker identified IRAS-FPA Survey Scans that contained comet 9P/Tempel 1, then combined the scans by satellite operations plan number and reduced these data to radiance and noise map images (/DATA/SURVEY/IMAGES/). Using these images, Russell Walker performed photometry of the coma and produced radiance photometry and noise tables (/DATA/SURVEY/PHOT/). An extensive discussion of these data was provided by Russell Walker and is included on this volume (/DOCUMENT/EXP_SUPP_SURVEY.*). IRAS Sky Survey Altas, Trail Images =================================== Russell Walker reviewed the IRAS Sky Survey Altas (ISSA) and found 56 images in the ISSA Reject Files that contained the dust trail of comet 9P/Temple 1. The files were not reprocessed or color corrected. The images are included in this collection to facilitate future reference and analysis. A discussion of data by Russell Walker is included on this volume (/DOCUMENT/EXP_SUPP_TRAIL.*). Disk Format =========== This disk was formatted so that a variety of computer systems (for example, IBM PC, Macintosh, Sun, VAX) can access the data. Specifically, the disk is formatted according to the ISO 9660 level 2 Interchange Standard. The disk will appear to the user to be identical to a file system of directories, sub-directories, and data files. File Format =========== PDS label formats and documentation conform to standards as defined by the Planetary Data System Standards Reference (JPL Document D-7669, Part 2JPL D-7669, Part 2, October 2002, Version 3.5) and the Planetary Science Data Dictionary (JPL D-7116, August 2002, Rev. E). Directory and File Information ============================== |-AAREADME.TXT - The text version of the AAREADME file. | |-VOLDESC.CAT - Description of the contents of this volume. | | |-FILTERS--|-*.TAB - Spectral Response for the 4 FPA bands |-CALIB----| | |-AO-------|-PROCLOGS - Processing and reduction logs | | |-MANIFEST.TAB - List of the files PROCLOGS | | | |-SURVEY---|-SURVEY_SCANS_USED.TXT | |-TEMPEL1_ELEMENTS_USED.TXT | |-PROCLOGS - Processing and reduction logs | |-MANIFEST.TAB - List of the files PROCLOGS | |-CATALOG - Mission, instrument, and data set descriptions | | |-AO-------|-IMAGES - Radiance and noise map images (FITS) | | |-PHOT - Radiance and noise photometry tables | | |-DATA-----|-SURVEY---|-IMAGES - Radiance and noise map images (FITS) | | |-PHOT - Radiance and noise photometry tables | | | |-TRAIL----|-Unprocessed dust trial images (FITS) | | |-EXP_SUPP_AO.* - Discussion of AO data |-DOCUMENT-|-EXP_SUPP_SURVEY.* - Discussion of Survey Scan data | |-EXP_SUPP_TRAIL.* - Discussion of Trail images | |-INDEX - Indices for DATA files Cognizant Persons ================= All data, calibration, and document files were produced by Russell Walker. All data labels were produced by Ray Espiritu of Applied Coherent Technology Coporation under the direction of Stephanie McLaughlin, PDS-SBN/University of Maryland. Catalog files, index files, and all other labels (such as calibration), were produced by Stephanie McLaughlin, PDS-SBN/University of Maryland.