SATELLITE PREDICTION AND DISPLAY: A REVIEW OF SPAD.
NAVAL RESEARCH LAB WASHINGTON D C
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A satellite position prediction and display device SPAD has been conceived, constructed, and operated at the Naval Research Laboratory. Experience with the research equipment has shown that it is technically feasible to implement the SPAD concept in several ways, using a digital computer for prediction and using both a geographic display and a tabular readout to present predicted positions of selected satellites at arbitrary times. Other conclusions include the following. Predicted satellite positions should be computed at the users location, using orbital elements and orbit decay information so that prediction can continue even with stale data. The general features of the SPAD computer control panel should be retained, since they provided a great deal of flexibility in presenting predicted positions at arbitrary times for a number of satellites selected either individually or according to category, as fast as such information was requested of the ANUYK-1 computer. Author
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