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additional aeronautics agencies aircraft ALSEP analysis Apollo astronauts astronomy atmosphere Biosatellite budget capability cell Centaur Chairman Chart chemical committee complete cost EARTH RESOURCES SURVEY effort electric electronics engine environment ERTS experimental experiments facilities fiscal year 1970 funds future Goddard GSFC HECHLER improved increase instruments investigations JAFFE KARTH Laboratory Langley Research Center launch vehicle lunar LUNDIN magnetosphere major Mars ment Mercury million missions Moon NASA NASA's NAUGLE NERVA Nimbus noise OART objectives observations Observatory operational orbit ORBITING ASTRONOMICAL OBSERVATORY OSSA payload Planetary Explorer planets planned problems propellant propulsion question radiation reduced request Research and Technology Research Center rocket satellite Saturn Science and Applications scientific sensors solar solar cell solar wind sounding rockets Space Applications Space Science spacecraft specific impulse structure studies subcommittee surface techniques temperature tion ultraviolet University Venus X-ray