Computer Science – Sound
Scientific paper
Sep 1976
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976ang....32..195d&link_type=abstract
Annales de Geophysique, vol. 32, July-Sept. 1976, p. 195-201. In French.
Computer Science
Sound
Aeronomy, Cameras, Photographic Tracking, Triangulation, Artificial Clouds, Camera Shutters, Chemiluminescence, Cloud Photographs, Equipment Specifications, Oxygen Atoms, Rocket Sounding, Thermosphere
Scientific paper
The IAS triangulation camera has been used in the NO-II rocket sounding experiment whose aim was to determine oxygen atom concentration in the lower thermosphere by measuring the chemiluminescence from the reaction of nitric oxide and an oxygen atom. The camera, with an aperture of F/5 and a focal length of 500 mm, has an azimuthal frame and is equipped with a view finder. The camera turns freely about its axis and points rapidly in the direction of the celestial body. An automatic electronic shutter improves the quality of stellar images and thus the accuracy of the measured coordinates. Its systematic accuracy is 1 sec which allows altitude determinations of artificial clouds with absolute accuracies of 0.1 km at a height of 100 km and of the order of 1 km above this height.
Debehogne Henri
Lippens C.
van Hemelrijck E.
Van Ransbeeck Emiel
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