Accession Number:

AD0631438

Title:

ADVANTAGES OF A 4-AXIS TRACKING MOUNT FOR THE PHOTOELECTRIC PHOTOMETRY OF SPACE VEHICLES

Descriptive Note:

Corporate Author:

AEROSPACE RESEARCH LABS WRIGHT-PATTERSON AFB OH

Personal Author(s):

Report Date:

1965-12-01

Pagination or Media Count:

50.0

Abstract:

Arguments are presented for the necessity of using a four-axis telescope Quad-R-Axial mount for the photoelectric photometry of satellites if small field apertures and hence low sky background signals are to be achieved. Since the signal to noise ratio of the targetbackground is proportional to the square of the diameter of accepted field, any reduction of guiding errors which will allow smaller field apertures will then allow the photometry of fainter satellites, providing telescopes of adequate aperture are used. The improved tracking will also reduce interruptions of the light curves resulting from loss of the vehicle from the sensing aperture. The improvements possible with a QRA mount over the 2-axis alt-azimuth and the 3-axis Baker-Nunn are shown and procedures for computation of mount settings established. Photoelectric data taken with an existing 3-axis system are given for several satellites.

Subject Categories:

  • Optical Detection and Detectors
  • Spacecraft Trajectories and Reentry

Distribution Statement:

APPROVED FOR PUBLIC RELEASE