Accession Number:

AD0692323

Title:

THE UPPER ATMOSPHERE AND ITS INFLUENCE ON SATELLITE ORBITS.

Descriptive Note:

Technical rept.,

Corporate Author:

ROYAL AIRCRAFT ESTABLISHMENT FARNBOROUGH (ENGLAND)

Personal Author(s):

Report Date:

1969-05-01

Pagination or Media Count:

20.0

Abstract:

The chief variations in upper-atmosphere density are described, and it is shown how each of them affects the orbits of close Earth satellites. The main features discussed are 1 the irregular variations in density dependent on solar activity, which may cause great changes in a few days, as well as a 27-day recurrence tendency 2 the day-to-night and semi-annual variations in density, which cause nearly-periodic changes in orbits for the day-to-night variation the period is usually between 2 months and 2 years, while the semi-annual effect leads to maxima of density in April and October, and minima in January and July and 3 the large changes in density during a sunspot cycle, which give rise to a 10- or 11-year recurrence tendency. The changes in orbital inclination caused by the rotation of the atmosphere are also described. Author

Subject Categories:

  • Atmospheric Physics
  • Spacecraft Trajectories and Reentry

Distribution Statement:

APPROVED FOR PUBLIC RELEASE