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/ Space & Astronomy / Space and Astronomy (October 1993).iso / pc / images / shuttdoc / commov08.gif

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Graphics Interchange Format  |  1993-04-30  |  93KB  |  3300x2560

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OCR: NASA SUBJECT: NAME: Lyndon B. Johnson Space Center MISSION I.C. THE SATELLITE NETWORK (CONTINUED) DG44/RENA H. HALDIMAN OPERATIONS DATE: PAGE DIRECTORATE AUGUST 26, 1987 7 THIS PICTURE ILLUSTRATES THE 95 PERCENT WORLD COVERAGE PROVIDED BY TWO TDRS. EACH TDRS FLIES IN GEOSYNCHRONOUS ORBIT, THEREBY MAINTAINING SPECIFIC LONGITUDES ALONG THE EQUATOR AND THUS IMPROVING COMMUNICATIONS CAPABILITY. FOR EXAMPLES, ONE TORS COVERS MORE AREA THAN THREE GROUND STATIONS IN A ROW. TORS spare 79 W longitude TORS East TORS West 41 W 171ªW longitud longitude WSGT IN 1200 KM attitude Comum required for 100% coverage) for both MA and SA users

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