PHOTOGRAMMETRIC OCEAN SURVEY EQUIPMENT (POSE).
Evaluation rept. Jun 66-Jun 67,
PAN AMERICAN WORLD AIRWAYS INC PATRICK AFB FL GUIDED MISSILES RANGE DIV
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This report discusses the concepts, equipment and techniques used at the Air Force Eastern Test RAnge to geodetically position a ship at sea. Experimental tests were performed using a prototype gyrostabilized camera aboard a ship and several land based cameras to simultaneously observe light from a satellite and a star background. The ship camera and fixed cameras in Mass., Tenn., N. C., Fla., and at Grand Turk Island observed Pageos, Echo I or Echo II satellites. Stellar orientation and photogrammetric triangulation were used to position the ship which was situated about 5 nm offshore from Cape Kennedy. The ship position was concurrently determined with theodolites from land sites near Cape Kennedy to serve as an accurate standard for POSE comparison. Comparisons of 9 tests show that the ship was located with the POSE system to an accuracy of 29 feet in latitude and 6 feet in longitude on the North American Datum. Analysis indicates that 10 tests with the prototype system will permit ship location in most parts of the world to a geodetic accuracy of from 30 to 60 feet circular probable error CPE. Combining the ship position thus obtained with concurrent sounding data will permit geodetic positioning of ocean bottom beacons to an accuracy of from 45 to 70 feet CPE. Studies in progress indicate that improved equipment and satellite observation techniques can be realized that will further reduce these uncertainties. Positioning of broad ocean area targets to a geodetic accuracy of 30 feet CPE is considered a realistic goal.
- Optical Detection and Detectors