19P/Borrelly 1 Digital Elevation Model from DS1

Status: Archived

This data set contain digital elevation maps of the unit surface normal vector for that part of the 19P/Borrelly 1 nucleus imaged by the Miniature Integrated Camera and Spectrometer (MICAS) aboard Deep Space 1. It includes maps created by both the US Geological Survey (USGS) and the Deutschen Zentrum fur Luft- und Raumfahrt (DLR).

• ZIP file of the data set (5.5Mb, 18Mb unzipped), for downloading.

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 Space 1 Mission File
• DS1 spacecraft Catalog File
• MICAS Instrument Catalog File
• Data Set Catalog File
  
• 19P/Borrelly 1 Target Catalog File
• Reference list

Data Files

The main data files are located in the data/ subdirectory and consists of ASCII tables of elevation computed by each institution:

• The DLR table gives (x,y,z) coordinates for the observed surface of 19P/Borrelly 1 relative to an arbitrary plane (PDS label).
• The USGS table lists (x,y,z) coordinates and also includes components for the surface normal vector at each point (PDS label).

In addition, the data/images/ subdirectory contains FITS versions of the images used by the two groups to create their maps; and the data/matrices/ subdirectory contains ASCII versions each of the (x,y,z) and (Nx,Ny,Nz) components from the USGS file, above, with fill values added to create regular, rectangular arrays more convenient for analysis with some software.

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.

Three documents are presented: the MICAS technology validation report, and example surface plots of the data from various points of view.

• The coords.txt text file provides an description of the coordinate system used in the digital elevation maps (PDS label).
• The MICAS technology validation report is provided in MS Word and flat text, with graphics in separate PNG files for each figure or table in the document directory. There is a single label file for all the pieces.

• Sample surface plots are provided each in a separate PNG image file. A single text file is provided to describe them generally. The individual plots are:
  • 0°
  • 45°
  • 90°
  • 135°
  • 180°
  • 225°
  • 270°
  • 315°

Index Files

This directory 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.