Accession Number : AD0770989

Title :   A Comparison of Densities Deduced from Radar Determined Orbital Decay and Accelerometer Measurements from Low Altitude Satellites,


Personal Author(s) : Rugge,Hugo R.

Report Date : 21 NOV 1973

Pagination or Media Count : 19

Abstract : A comparison has been made of atmospheric density as deduced from high resolution radar-determined orbital decay data and from data supplied by a uniaxial MESA accelerometer flown onboard two low altitude satellites in June-July and August-September, 1970. The radar deduced densities, having an effective six hour time resolution, were determined at altitudes of 143 km and 169 km, very close to one-half scale height above perigee for the two satellites respectively. The accelerometer-deduced densities at these same altitudes were obtained on both the approaching-perigee and leaving-perigee portion of each of 59 orbits for the lower altitude satellite and each of 250 orbits for the higher altitude satellite. A detailed time comparison of the densities derived from radar-tracking and the accelerometer is presented. (Modified author abstract)

Descriptors :   *Atmospheric density, Scientific satellites, Orbits, Radar tracking, Aerodynamic drag, Accelerometers

Subject Categories : Atmospheric Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE