Accession Number:

AD0815397

Title:

EFFECTS OF ATMOSPHERE ROTATION RATE ON ORBITS AND ORBIT DETERMINATION

Descriptive Note:

Rept. for Apr 1966-Feb 1967

Corporate Author:

AEROSPACE CORP EL SEGUNDO CA EL SEGUNDO TECHNICAL OPERATIONS

Personal Author(s):

Report Date:

1967-04-01

Pagination or Media Count:

35.0

Abstract:

The effect of increased atmosphere rotation rate on low perigee altitude orbits and the effect of underestimation of atmosphere rotation rate on orbit determination are displayed using simulation results. Crosstrack changes in satellite position due to increased rotation rate are small. Intrack changes, though larger, are small-error sources in orbit determination and short-term prediction if a seven-parameter fit is used. The angles between satellite inertial velocity and wind vectors that produce zero tangential acceleration and maximum normal acceleration are derived for any wind and for the special case of a circular orbit in a rotating atmosphere. This analysis explains the increased decay rates of some near-polar orbits due to a rotating atmosphere and the inability to predict this effect with frequently used approximations.

Subject Categories:

  • Spacecraft Trajectories and Reentry

Distribution Statement:

APPROVED FOR PUBLIC RELEASE