Deep Impact Radio Science Data
from the 9P/Tempel 1 Encounter

Status: Archived

This volume contains raw Radio Science data for the Deep Impact flyby spacecraft, collected from June 27 through July 11, 2005, during the encounter with comet 9P/Tempel 1. There was no comet gravity signal detected in the tracking data and hence no gravity science. In addition, there was no evidence in the spacecraft tracking data for dust or gas drag near the time of closest approach.

• ZIP file of the data set, (19 Mb, ~72 MB unzipped) for downloading

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

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.

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

Note that the data set catalog file is preliminary and subject to frequent editing until a peer review has been scheduled for these data.

• Deep Impact mission file
• Fly-by Spacecraft instrument host file
• Radio Science Subsystem instrument file
• Data Set file
  
• 9P/Tempel 1 target file
• References file
• Personnel 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.

Additional explanatory material about this data set have been provided in two separate System Interface Specifications (SIS) documents:

• The SIS for the EOP Data Interface (PDS label).
• The SIS for the DSN Media Calibration Data File (PDS label).

Data Files

• The odf/ subdirectory contains five Orbital Data Files for the flyby spacecraft providing two-way Doppler and sequential range measurements:
  • 5178180a.odf (PDS label)
  • 5180183a.odf (PDS label)
  • 5183185a.odf (PDS label)
  • 5185188a.odf (PDS label)
  • 5188192a.odf (PDS label)
  
  
• The eop/ subdirectory contains one Earth-Orientation Parameter file:
  • 43285245.eop (PDS label)
  
  
• The ion/ subdirectory contains one Ionosphere Calibration file:
  • 51525213.ion (PDS label)
  
  
• The tro/ subdirectory contains two Troposphere Calibration files:
  • 20018001.tro (PDS label)
  • 51525213.tro (PDS label)

Index Files

The index/ directory contains the required PDS index into the files in the data directory (data/).

• indxinfo.txt describes the directory contents.
• index.tab is a CSV table meeting the PDS indexing requirements. (PDS label)
• checksum.tab provides a checksum for each file in this data set excluding checksum.tab, checksum.lbl, and any download files. (PDS label)