Computer Science – Performance
Scientific paper
Aug 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985icrc....3..391h&link_type=abstract
In its 19th Intern. Cosmic Ray Conf., Vol. 3 p 391-394 (SEE N85-34862 23-93)
Computer Science
Performance
Astronomical Photography, Azimuth, Balloon-Borne Instruments, Cameras, Elevation Angle, Pattern Recognition, Star Distribution, Computer Programs, Gamma Rays, Least Squares Method, Magnetometers, Microprocessors, Photointerpretation, Stars, Telemetry
Scientific paper
A balloon-borne experiment containing a star camera aspect system was designed, built, and flown. This system was designed to provide offset corrections to the magnetometer and inclinometer readings used to control an azimuth and elevation pointed experiment. The camera is controlled by a microprocessor, including commendable exposure and noise rejection threshold, as well as formatting the data for telemetry to the ground. As a background program, the microprocessor runs the aspect program to analyze a fraction of the pictures taken so that aspect information and offset corrections are available to the experiment in near real time. The analysis consists of pattern recognition of the star field with a star catalog in ROM memory and a least squares calculation. The performance of this system in ground based tests is described. It is part of the NASA/GSFC High Energy Gamma-Ray Balloon Instrument (2).
Baker Robert G.
Hunter Stan D.
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