Deep Impact: Shape Model of 9P/Tempel 1 Version 1

Status: Archived

This data set contains the shape model of comet 9P/Tempel 1 as derived from Deep Impact images obtained near close approach. It is a triangular plate model that reproduces the basic surface topography on the nucleus. Two versions of this model are included. The first is given in planetocentric coordinates and the second in cartesian coordinates.

• ZIP file of the data set (1.7Mb), for downloading.

An overview of the volume contents is provided in aareadme.txt.

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 an instrument specialist.

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

• Deep Impact Mission File
• Deep Impact flyby spacecraft Catalog File
• Deep Impact impactor spacecraft Catalog File
• High resolution imager Instrument Catalog File
• Medium resolution imager Instrument Catalog File
• Impactor targeting system Instrument Catalog File
• Data Set Catalog File
  
• 9P/Tempel 1 Target Catalog File
• Reference list Catalog File

Documentation Files

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

• Image of the nucleus showing the crater that defines the prime meridian.
  • PNG version t1_prime_meridian.png.
  • PDF version t1_prime_meridian.pdf.
  • Label t1_prime_meridian.lbl

• Image showing multiple views of the shape model from different viewpoints. Features from the images have been mapped onto the surface and the planetocentric coordinate grid is superposed.
  • PNG version tempel1_coordinates.png.
  • PDF version tempel1_coordinates.pdf.
  • Label tempel1_coordinates.lbl

• A description of the format that was adopted by the PDS SBN for shape models of small bodies. The Tempel 1 model follows this format.
  • Document plate_shape_definition.txt.
  • Label plate_shape_definition.lbl

Data Files

The data files are located in the data/ subdirectory. The PDS labels are in separate files from the data.

• tempel1_cart.tab contains the plate model of the nucleus in cartesian coordinates.
  Label is tempel1_cart.lbl

• tempel1_plan.tab contains the plate model of the nucleus in planetocentric coordinates.
  Label is tempel1_plan.lbl

Browse Files

The browse/ subdirectory contains two VRML versions of the shape model. These can be viewed and manipulated with any standard VRML viewer. The directory contents are described by the browinfo.txt file.

The first version, tempel1_shape_vrml_solar.wrl uses illumination conditions that approximate those at the time of the Deep Impact encounter (PDS label)

The second version, tempel1_shape_vrml_headl.wrl uses a headlight to illuminate the entire surface. (PDS label)

Index Files

The index/ subdirectory contains an index into the data files included on this volume (in the data/ directory).

• indxinfo.txt describes the directory contents.
• index.lbl describes the contents of the index.tab file.
• checksum.tab is flat table of MD5 checksums for each file in the official archive volume except for itself and its PDS label.