Cover: Coordinates of Features on the Mariner 6 and 7 Pictures of Mars.

Coordinates of Features on the Mariner 6 and 7 Pictures of Mars.

Published 1971

by Merton E. Davies

Purchase Print Copy

 Format Price
Add to Cart Paperback70 pages $25.00

Final report on the computation of a control net of Mars based on the Mariner 6 and 7 pictures. The high resolution and large phase angle permitted selection of control points smaller and better defined than any in earth-based telescopic studies; they are, therefore, difficult to compare. The points reported in RM-6381 were remeasured; some were redefined and some replaced by new points for a total of 115 points encircling Mars. Near-encounter pictures were geometrically corrected; far-encounter measurements were corrected using a special distortion-removing computer program developed by R. B. Leighton. Results are given separately and combined. The latter computation involved the 115 points, 880 observation equations, and 401 normal equations. This report describes the photogrammetric measurement techniques, gives the trajectory data, and presents labeled photographs and tables of both areocentric and areographic coordinates. Differences in the Mariner 6 and 7 coordinates were not fully reconciled; better spacecraft orientation data are needed. 70 pp. Ref.

This report is part of the RAND report series. The report was a product of RAND from 1948 to 1993 that represented the principal publication documenting and transmitting RAND's major research findings and final research.

This document and trademark(s) contained herein are protected by law. This representation of RAND intellectual property is provided for noncommercial use only. Unauthorized posting of this publication online is prohibited; linking directly to this product page is encouraged. Permission is required from RAND to reproduce, or reuse in another form, any of its research documents for commercial purposes. For information on reprint and reuse permissions, please visit

RAND is a nonprofit institution that helps improve policy and decisionmaking through research and analysis. RAND's publications do not necessarily reflect the opinions of its research clients and sponsors.