The determination and analysis of the orbit of Nimbus 1 Rocket, 1964-52B - The semiannual variation in air density from June 1968 to August 1974

Details The determination and analysis of the orbit of Nimbus 1 Rocket, 1964-52B - The semiannual variation in air density from June 1968 to August 1974 The determination and analysis of the orbit of Nimbus 1 Rocket, 1964-52B - The semiannual variation in air density from June 1968 to August 1974

Dec 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985p%26ss...33.1417b&link_type=abstract

Planetary and Space Science (ISSN 0032-0633), vol. 33, Dec. 1985, p. 1417-1431. SERC-sponsored research.

Physics

3

Annual Variations, Atmospheric Density, Nimbus 1 Satellite, Orbit Calculation, Orbit Decay, Satellite Orbits, Diurnal Variations, Exosphere, Geomagnetic Latitude, Magnetic Disturbances, Orbital Mechanics, Solar Activity Effects, Vertical Distribution

Scientific paper

Orbital decay rates of the satellite Nimbus 1 Rocket (1964-52B) have been calculated to obtain 619 values of atmospheric density at heights between 240 and 430 km for the period from June 1968-August 1974. After allowing for changes due to solar activity, geomagnetic disturbances, the day-to-night, and seasonal-latitudinal variations the residual semiannual variation in exospheric density is revealed. It is shown that: (1) the amplitude of a particular maximum or minimum of the semiannual variation varied by as much as 20 percent from year to year; (2) the October-November maximum was nearly always higher than the corresponding March-April maximum; (3) the January-February minimum was always higher than the corresponding July-August minimum; and (4) the average dates of the maxima and minima agreed well with previous determinations.

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