(KSC) Vandenberg Air Force Station on the west coast. Two Orbiters can be acted upon.

С-з е U. 8. GOVERNMENT PRINTING OFFICE : 1981 723-000/562 PRECEDING PAGE BLANK NOT FILMED 6-43 Briefly... Tracking stations scattered around the Sun, thus creating 4 simultaneous 24 hour days occur within 1 Earth rotation... * 4.