Deep Impact Thermal-Vacuum 3 ITS Instrument Data

Status: Archived

This volume contains images acquired during the preflight thermal-vacuum test (TV3) of the Imaging Targeting Sensor's Visible CCD (ITS) for the Deep Impact Mission. This instrument resides on the Impactor spacecraft. Data from TV3 cover the time period of 16 January 2003 through 30 January 2003. The actual cold test of the ITS in a thermal-vacuum chamber did not begin until 27 January 2003. TV3 was conducted at Ball Aerospace.

The data total over 3.5Gb. The individual day directories are presented here as separate tar files for those with sufficient interest and bandwidth to download them in their entirety.

• Catalog, document and supporting files (653Kb zip file)
• Day 016 (673Mb tar file)
• Day 017 (51Mb tar file)
• Day 018 (132Mb tar file)
• Day 020 (385Mb tar file)
• Day 021 (151Mb tar file)
• Day 023 (579Mb tar file)
• Day 025 (94Mb tar file)
• Day 026 (42Mb tar file)
• Day 027 (85Mb tar file)
• Day 028 (153Mb tar file)
• Day 029 (175Mb tar file)
• Day 030 (1.3Gb tar file)

An overview of the volume contents is provided in aareadme.txt, a flat text file with an attached label.

Catalog Files

Catalog files contain the overview information and parameters used in loading the PDS central catalog, specifically, or for developing other interfaces to the data outside of PDS. The information they contain, particularly in their descriptive text fields, should be clear, complete, and understandable to a research user who is not necessarily a mission or instrument specialist. The mission, instrument host, and instrument catalog files for this archive are intended to be brief because the project team is pursuing permissions from Space Science Reviews to include recently submitted papers in all Deep Impact archival data sets.

These files are located in the catalog/ subdirectory. The directory contents are described by the catinfo.txt file.

• DI Mission Catalog File
• Impactor Spacecraft Catalog File
• ITS Instrument Catalog File
• Data Set Catalog File
• Ground Calibration Target File
• Tempel 1 Target Target File
• References Reference File
• Personnel Catalog File

Documentation Files

In addition to the small text files located throughout the volume to describe directory contents, some specific documents are provided to assist with understanding the data and processing involved. These files are located in the document/ subdirectory. The directory contents are described by the docinfo.txt file.

In the imagelog/ subdirectory:

• tv3_its.xls contains the image log created during TV3 in Excel spreadsheet format. Image parameters, such as mode and experiment type, were recorded. The log also provides a summary of the experiments performed each day and a list of the experiment types with descriptions. .
• tv3_its.asc contains a flat, comma-delimeted, AScII version of the tv3_its.xls file.
• tv3_its.lbl contains the PDS label for both the .xls and .asc files.

In the pdsdd/ subdirectory:

• pdsdd_di.full is local Planetary Science data dictionary listing for for the Deep Impact thermal-vacuum data sets, including TV3. Locally-defined keywords for Deep Impact have the prefix 'DEEPIMPACT:' in the data labels. Definitions and values of local keywords found in the dat dictionary. The dictionary is ASCII text.
• pdsdd_di.idx is index file for the Deep Impact local data dictionary. The dictionary index is ASCII text.
• pdsdd_di.lbl contains the PDS label for the .asc file.

In the reports/ subdirectory:

• report_yyyymmdd.asc contains six reports produced by test personnel at the end of several different test days. Each report summarizes the activity for that day. Reports are in ASCII text format.
• reports.lbl contains the PDS label for all report files in this subdirectory.

Data Files

Data files reside in the data/ subdirectory:

ITS image data from TV3 are grouped by instrument (ITS) then by test day of year in the data/its/2003/ subdirectory. Data are 2-dimensional FITS images, identified by the extension ".fit". Each FITS file has a detached PDS label, identified by the extension ".fit". There are 2559 FITS images (3.8GB) from TV3:

• 2003-01-16 (DOY 016)
• 2003-01-17 (DOY 017)
• 2003-01-18 (DOY 018)
• 2003-01-20 (DOY 020)
• 2003-01-21 (DOY 021)
• 2003-01-23 (DOY 023)
• 2003-01-25 (DOY 025)
• 2003-01-26 (DOY 026)
• 2003-01-27 (DOY 027)
• 2003-01-28 (DOY 028)
• 2003-01-29 (DOY 029)
• 2003-01-30 (DOY 030)

Various temperatures for the ITS instrument were automatically recorded, approximately every 5 minutes, by a thermister monitor, a computer. These data are available in the data/templog/ subdirectory. The temperature data are in a fixed-width, comma-separated, ASCII table, identified by the extension ".tab". The table has a detached PDS label.

• templog_tv3_its.tab is the temperature table.
• templog_tv3_its.lbl is the label.

Index Files

The index/ directory contains an index into the data files included on this volume. All index files are fixed-width, comma-delimited ASCII tables.

• indxinfo.txt describes the directory contents.
• index.tab is a a fixed-width, delimited index table. For image data on this volume, table entries contain useful image parameters, such as instrument mode and experiment type.
• index.lbl is the label for the index file.