United States Space Science Program: Report to COSPAR.

1966 University absorption AFCRL airglow altitude analysis Astronautics Astronomical Journal 71 Astronomy Rept Astrophysical Journal atomic auroral balloon Center Churchill cloud cosmic cosmic-ray detectors determine developed diurnal Earth effects Eglin electron density emission energy experimental experiments F region flux Fort Churchill frequency Gemini geomagnetic Geophysical Research 71 GSFC Icarus infrared instrumentation interplanetary ionization ionosphere Jet Propulsion Laboratory Journal of Geophysical Journal of Spacecraft latitude launched lunar lunar surface magnetic field magnetosphere Mars Martian measurements meteorites meteorological Moon NASA NASA Technical Note Observatory observed obtained optical particles photographs Planetary and Space plasma polar probe protons radar radiation radio range region satellite Scientific Smithsonian Astrophysical Observatory solar wind Space Flight Space Science Space Science 14 spacecraft Spacecraft and Rockets spectra spectrometer spectrum technique temperature thermal tion trajectories University of Iowa upper atmosphere variations velocity Venus Wallops Island wavelength White Sands x-ray