others over the past four years for the Society’s consideration and evaluation. This report is an in-depth review
of one of the six working groups of Commission I, and is specifically addressed to the applications of aerial
color photography, current research, and proposed investigations. The intent of this report is to bring to the
attention of the Society practical interests in aerial color imagery by reporting the experimental works of the
many scientists and engineers from our academic sector, private industry, and government. These efforts have
been specifically oriented to the development of standards for spectral evaluation. In the time allowed for this
presentation, only a few experiments of particular technical interest have been selected and presented. The
report concludes with and appeal for continued research and bibliography of papers on aerial color
photography.
10. Doyle, F.J.
United States
IMAGING SENSORS FOR SPACE VEHICLES
This review describes the imaging sensors for various kinds of space missions. Operational weather satellites
carry vidicon cameras and scanning radiometers, which provide image data in the visible and several infrared
spectral bands. Research satellites in near-polar and geostationary orbits will carry similar systems of higher
resolution. In the Apollo Lunar Exploration Program, the Hasselblad camera with lenses of several focal
lengths was used through Mission 12. On Missions 13 and 14, a 460 mm camera was employed. Missions 15,
16, and 17 carry a 75 mm metric camera and a 600 mm panoramic camera. The Earth Resources Technology
Satellite ERTS-A will carry a three-camera vidicon system and a four channel scanner. The SKYLAB will carry
a six-film camera multispectral system, a thirteen-channel multispectral scanner, and a high-resolution film
camera. The Mars Mariner carried two television cameras with wide- and narrow-angle coverage. The Mars
Viking will carry television cameras in the orbiter and facsimile stereocameras in the lander. Imaging sensors
being developed for future missions include unmanned cartographic film-return systems, linear arrays of
light-sensitive diodes, electrostatic-tape cameras, and high-resolution reflective optics scanners.
11. Ducloux, J.
France
EXAMINATION OF FILM DEFORMATION
FOR AERIAL PHOTOGRAPHY
The aim of this investigation is to determine the influence of development conditions on the geometry of
‘aerial’ films and)to define the best calculating processes for compensating for deformations. It was made on
two Kodak Plus X films on which the picture of an engraved pattern was produced a great many times and
which were developed in two different ways, ie. with an automatic roller developer and with a see-saw
developer. Measurements (53 points on each picture) were made with a Zeiss-Jena Ascorecord. Calculations
are performed either on all the points or by selecting four points in different ways (assimilated to metric
chamber markers). On these four points an adjustment is made on the figure by using different formulas, and
the transformation thus defined is then applied to all the points. The results obtained reveal the significance
of the development method and of the hygrometry while at the same time revealing deformations at the
beginning of the film and showing the necessity to choose well adapted compensation formulas ( homographic
formulas appear poorly adapted). Beyond the first few meters of the film, deformations are slight for standard
work on a first-rate analog plotter. Some experiments on the way plates are developed and on film storage
conditions are also described.
12. Ebron, G.I
United States
ES-75 PHOTOGRAPHIC COLOR PROCESSING, DUPLICATION,
AND INTERPRETATION FACILITY
The US. military has had mobile photo processing labs mounted in trucks and trailers since World War I.
Limited as the early facilities were, they served a purpose and the need for them was obvious a--deployed flying
unit collecting aerial photography requires a processing facility assigned with the aircraft for fast and efficient
evaluation results.
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