Accession Number:

ADA097696

Title:

The Orbit of 1972-05B in its Final Phase, with Geophysical Inferences.

Descriptive Note:

Technical rept.,

Corporate Author:

ROYAL AIRCRAFT ESTABLISHMENT FARNBOROUGH (ENGLAND)

Personal Author(s):

Report Date:

1980-09-01

Pagination or Media Count:

22.0

Abstract:

The polar orbit of Hoes 2 second-stage rocket, 1972-05B, has been determined on each of the final 16 days before its decay in September 1978, using the RAE orbit refinement program, PROP 6, with about 1360 observations. An accuracy of 30-70 m, both radial and across track, was achieved. Eleven values of density scale height have been determined from the decrease in perigee height, with a 2 per cent error seven of these values are within 6 per cent of the CIRA 1972 reference-atmosphere values, the rms value being 4 per cent higher than CIRA. The rotation rate of the upper atmosphere, delta, was determined from the decrease in orbital inclination as delta 1.40 or - 0.05 revday ie a strong west-to-east zonal wind of 160 or - 20 ms, at a mean height of about 240 km. The local time was 01-02 h solar activity was high and the latitude of perigee moved steadily from 10 deg N to 67 deg S.

Subject Categories:

  • Spacecraft Trajectories and Reentry

Distribution Statement:

APPROVED FOR PUBLIC RELEASE