Geology topics
Frederick J. Doyle
Publications and source records attributed to Frederick J. Doyle.
Can satellite photography contribute to topographic mapping?
Photographs taken on early space missions, in the Gemini-Apollo series, demonstrated the usefulness of the long view for cartography despite acknowledged shortcomings. Later developments, such as ERTS and Skylab, will provide far more data about Earth, but mostly in planimetric form. The third dimension, height, which makes the map representation topographic, is not easy to measure at orbital altitudes. The capability of current and near-future systems is not likely to do much for topographic mapping at scales larger than 1:250,000, but the benefits in planimetric mapping may be better than even the optimists hoped for.
Orbital-science investigation: Part B: photogrammetric analysis of Apollo 15 records
The three cameras—stellar, mapping, and panoramic—together with the laser altimeter, all included in the scientific instrument module (SIM) bay, represent an integrated photogrammatric system with extraordinary potential for extending knowledge of the lunar figure, surface configuration, and geological structure.
Photographic systems for Apollo
The primary objective of the Apollo Lunar Program is to provide data for landing sites. The primary objective of Skylab is to demonstrate the ability of men to operate in space for extended periods of time. As a consequence, neither the missions nor the cameras in either program are optimum for photogrammetric operations. Nevertheless they provide an opportunity to evaluate the contribution that photogrammetry and space can make to the exploration of our own and other planetary bodies in the solar system. New equipment includes: an 18-inch fl camera exposing 430 frames on a roll of 5-inch wide film; a panoramic system of 24-inch fl, 108° sweep, 4.5 by 45-inch film for 1650 exposures; a terrain camera of 3-inch fl, 4.5 X 4.5 film frame; a stellar camera of 3-inch fl on 35-mm film; and a laser altimeter. Six multispectral cameras, 6-inch fl on 70-mm film are planned for Earth photos from Skylab.