Accession Number:

AD0658529

Title:

DESIGN FOR ORIENTATION BALLOON-BORNE EQUIPMENT,

Descriptive Note:

Corporate Author:

MINNESOTA UNIV MINNEAPOLIS COSMIC RAY GROUP

Personal Author(s):

Report Date:

1967-06-01

Pagination or Media Count:

19.0

Abstract:

Presents the design of a system to orientate a balloon-borne instrument package about a vertical axis. Pointing accuracy obtained is plus or minus 1.5 degrees. An independent photographic recording system measures the azimuth angle with respect to the star Polaris to plus or minus 0.1 degrees. The instrument package is rotated against a light weight reaction wheel which is designed for maximum moment of inertia. A pulse-width modulation system is used to drive the orientation motor. A fluxgate magnetometer, used for the sensor element, causes the instrument package to be orientated with respect to the horizontal component of the earths field. The instrument, a gamma-ray telescope, is oriented in the north-south plane and is tilted at an angle with the vertical which will correspond with the elevation of the suspected gamma-ray source when the source crosses the local meridian. Author

Subject Categories:

  • Atmospheric Physics
  • Test Facilities, Equipment and Methods

Distribution Statement:

APPROVED FOR PUBLIC RELEASE