Data Acquisition and Retrieval System for a Geodetic Rangefinder.
Final rept. 1 Jun 72-31 May 73,
LOWELL TECHNOLOGICAL INST RESEARCH FOUNDATION MASS
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An instrument has been developed to measure, digitalize and store the amplitudes of signal pulses from an optical rangefinder. The pulses may be as short as 5 x 10 to the minus 9th power seconds in duration, 12 x 10 to the minus 6th power seconds or more apart, and may have peak values from 20 to 2,400 millivolts. These pulse amplitude measurements, and the related range-time interval and fiducial time data, are retrieved on paper tape. Format characters are inserted so that the TTY printout is in a convenient form for study or editing. This equipment is expected to reduce the preprocessing of geodetic range information accumulated during the orbital pass of a geodetic satellite from one man-week to three or four man-hours. The use of a D17B Minuteman computer for data processing and retrieval tasks at the AFCRL geodetic rangefinder station was studied. It was determined that this computer is not well suited to these applications. Author