space flight, control and data communications

space flight, control and data communications For necessary expenses, not otherwise provided for, in support of space flight, spacecraft control and communications activities of the National Aeronautics and Space Administration, including operations, production, services, minor construction, maintenance, repair, rehabilitation, and modification of real and personal property; tracking and data relay satellite services as authorized by law; purchase, lease, charter, maintenance and operation of mission and administrative aircraft; $5,086,000,000, to remain available until September 30, 1994.