Combined Pseudo Range and Doppler Positioning for the Stationary Navstar User.
Abstract
An early success in testing Navstar user equipment was achieved with the Manpack receiver. Using only two satellites, Navstars 1 and 2, the receiver accurately performed two-dimensional positioning while stationary. It was, in effect, combining pseudo range and integrated Doppler data. This concept of combining both types of data can be extended to three dimensions and to the operational Phase III Navstar. The stationary user can accomplish three-dimensional navigation with only three satellites. This capability is of interest to the Army since it would permit the stationary use of Navstar with much greater elevation mask angles. With the baseline 24-satellite constellation, three-dimensional navigation can be accomplished with a 30-deg mask angle, but it will take a few minutes longer because of the extra time required for making integrated Doppler measurements. Using this technique, three-dimensional position will be obtained to within 16 meters about 90 percent of the time. This operational capability will enhance the Army's ability to use Navstar in the presence of jamming, foliage, and terrain. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 20, 1979
- Accession Number
- ADA079543
Entities
People
- Paul S. Jorgensen
Organizations
- The Aerospace Corporation