PROCEDURES AND COMPUTER PROGRAMS FOR REDUCTION OF BALLISTIC PLATES FROM TRAILBLAZER I AND II PROGRAMS
MASSACHUSETTS INST OF TECH LEXINGTON LINCOLN LAB
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The Optical Reduction Programs have been written to obtain the space trajectory of a re-entering body from measurements of position on two photographic plates taken of a re-entry event from two separate stations. The method of analysis follows closely that developed by Whipple and Jacchia. The Programs are a modification for the Lincoln Laboratory 7094 computer of a program originally written at the Harvard Observatory for reduction of meteor trails. The computation is divided into two programs 1 The Plate Calibration Program calibrates the plate by using coordinates and plate measurements of known stars as reference points and 2 The Optical Trajectory Program computes range, height, time, direction cosines, and distance along the trail from the measured points on the trail. This paper discusses these two programs in detail, including program listings, flow charts, and directions for running the programs. The mathematical background and the experimental method for obtaining the input data are also discussed.
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