Accession Number:

ADA043744

Title:

Geometric Performance of Pseudoranging Navigation Satellite Systems: A Computer Program.

Descriptive Note:

Interim rept.,

Corporate Author:

RAND CORP SANTA MONICA CALIF

Report Date:

1977-07-01

Pagination or Media Count:

100.0

Abstract:

Describes a computer program designed to analyze many aspects of the geometric performance of pseudoranging navigation satellite navsat systems for users either on earth or in earth orbit. A navsat system includes a fleet of satellites, each with an accurate clock that transmits ephemeris, time, and other signals. These signal can be received by relatively small, inexpensive equipment, thus enabling the user to compute his position and time accurately. The NAVSTARGlobal Positioning System GPS is such a system, and its overall user accuracy can be broken down into two components which, when multiplied together, yield an estimate of the users position andor time accuracy. These two components are analyzed in this report the first depends on the relative geometry among the navsats being employed and the users location, and the second involves a determination of system errors.

Subject Categories:

  • Computer Programming and Software
  • Unmanned Spacecraft

Distribution Statement:

APPROVED FOR PUBLIC RELEASE