Accession Number:

AD0768245

Title:

The Mariner 9 Primary Control Net of Mars,

Descriptive Note:

Corporate Author:

RAND CORP SANTA MONICA CALIF

Personal Author(s):

Report Date:

1973-04-01

Pagination or Media Count:

21.0

Abstract:

A planetwide control net of Mars is being derived photogrammetrically from the television pictures that were returned by Mariner 9. Such a control net is required by cartographers to relate the coordinate system to landmarks and topography. Although the pictures cover the entire Mars surface, there are gaps in the low-resulution coverage. The vidicon camera, which produced the photos used in the control net computations, is a poor instrument for photogrammetric analysis because the electronic distortions are large and the format is small. The coordinate system incorporates a new direction for the spin axis of Mars, a prime meridian defined by a particular crater Airy-O on the surface, and a particular reference spheroid for areographic coordinates. The computation of the primary control net is a continuing project as of April 1973 it contained 1340 control points. Author

Subject Categories:

  • Astrophysics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE