PDS_VERSION_ID = PDS3 RECORD_TYPE = STREAM OBJECT = TEXT NOTE = "AAREADME file for SL9 Data Set Collection Volume" PUBLICATION_DATE = 1997-10-28 END_OBJECT = TEXT END ***** File AAREADME.TXT This data set collection contains IRTF image and tabular data. Only one data set is inlcuded on this volume. IRTF NSFCAM - Near-IR images for Jupiter/SL9 The Jupiter/SL9 data span the period from January 5 through August 7, 1994. The data files were submitted in the FITS form with documentation. In this case, a FITS to PDS translator program (F2P) has been used to create the detached PDS labels for each corresponding FITS file. The data were checked by manipulating the data with IDL routines developed at the Small Bodies Node (PDSREAD). A complementary PDS to FITS translator program is also included for completeness. Examples on the use of these routines and the source code are posted on the Small Bodies Node home page under Software Archives; also located at this address is the Quick Start Archiving guide. In the DOCUMENT directory are explanatory text files as well as digitized versions of the manuals that are in Postscript form with figures as TIFF files. All document files and most labels contain an 80-byte fixed length record, with a carriage return (ASCII 13) and line feed (ASCII 10) as the 79th and 80th byte respectively. All the tabular files in the INDEX and DOCUMENT directory are formatted according to PDS standards. It should be noted that the index tables are formatted so that they may be read directly into many database management systems. All fields are separated by commas, and character fields are inclosed in double quotes ("). An outline of the CD-ROM is shown in the table below: AAREADME.TXT Short introduction to CDROM contents ERRATA.TXT Outline of known errata and additions VOLDESC.CAT Description of files on volume /CATALOG/*.CAT Mission, host, instrument, data set, & ref **************************************************************************** A list of terms used for PDS specific files is listed below: DSCOLL - Data Set Collection catalog file *HOST - spacecraft or observatory (institution) that supports a mission *MSN - abbreviation for mission, used in filename for catalog *DS - abbreviation for data set, used in filename for catalog *INST (INS, IN) - abbreviations for instrument, used in filename for catalog ***************************************************************************** /DOCUMENT/*.ASC,*.PS.*.TIF Explanation for IRTF documents /DOCUMENT/ACRONYM.ASC List of acronyms /DOCUMENT/LOGNOTES/*.ASC,*.TIF Log book files from observers /DOCUMENT/FILTER/*.ASC,*.PRN Filter specs with transmission tables /DOCUMENT/FILTER/CVF/*.PRN Transmission tables fro CVF filters /INDEX/*.TAB Indexes by object(s) and volume /IRTF/ 19940105/flats /(the comet data) /stds 19940106/process/(the comet data) /flats /linechek /stds 19940107/(the comet data) /stds 19940511/(the comet data) /flats /stds 19940512/(the comet data) /stds 19940712/(the comet data) /flats /pre_std /post_std 19940717/pre_std /precurs /impacts /post_std 19940718/(Jupiter-Ring data) /pre_std /post_std 19940719/flats /pre_std /(Jupiter-Ring data) /sl9_k/(fragment K data) /post_std 19940727/(Jupiter-Ring data) /post_std 19940728/(Jupiter-Ring data) /post_std 19940807/(Jupiter-Ring data) /post_std The data directories for the NSFCAM data are organized by date. In the early periods (Jan and May) effort was made to observe the comet (as an object) or various fields of the comet (encompassing many fragments). Various stars or asteroids were used as standards; these are separated in the stds directory. Other calibration data include flats from reflected lights in the dome or off mirror covers. The comet data is in its original form, except for Jan 6, when there was a problem in applying flats directly to the data; in that case, the directory is identified as data that has gone through a "process". During the crash week, part of the data was used to search for precursor phenomena such as a flash (hence the positioning with Io and Europa in the frame). Other parts of the data were concentrated on the impacts of Jupiter or fragment K as it approached the planet (19940719/SL9_K). At other times, images were taken to emphasize Jupiter's rings or examine the earlier comet fields. For the data on July 12 - Aug 7, the calibration sequences are organized into "pre_std" and "post_std" sets for a given date. Some of this data may include certain exposure sequences on Jupiter itself. For further explanation, review DATANOTE.ASC in the Document directory. Note that the TARGET_NAME is set to Jupiter or SL9 as outlined in the ERRATA file. The original filename (ORIGNAME) is captured in the FITS header. If an image name begins with a number, such as 107 (january 7), 106 (january 6), 105 (january 5), 511 (may 11), 512 (may 12), 712 (july 12), 717 (july 17), 718 (july 18), 719 (july 19), 727 (july 27), 728 (july 28), 807 (aug 7), it pertains to a date. Files containing 'lin' are linearity check images. These are only found in the January 6th directory. Small Bodies Node, Planetary Data System Department of Astronomy, University of Maryland College Park, MD 20742-2421 e-mail to pdssbn.astro.umd.edu; URL-http://pdssbn.astro.umd.edu