Index of /volume/sl9_0002
Name Last modified Size Description
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Parent Directory -
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catalog/ 22-Nov-1998 11:58 -
document/ 22-Nov-1998 11:59 -
index/ 22-Nov-1998 11:59 -
irtf/ 22-Nov-1998 12:22 -
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aareadme.txt 25-Nov-1998 13:59 9.7K
errata.txt 22-Nov-1998 11:59 1.9K
voldesc.cat 22-Nov-1998 12:23 2.8K [PDS catalog file]
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