The World Geodetic System 1984 Earth Gravitational Model.

Abstract

The World Geodetic System 1984 (WGS 84) Earth Gravitational Model (EGM) consists of a set of normalized geopotential coefficients complete through degree (n) and order (m) 180. The first part of the EGM, through degree and order 41, was developed as a weighted least squares combination solution from mean free-air gravity anomalies; geoid undulations derived from satellite radar altimetry; laser, Doppler and NAVSTAR Global Positioning System (GPS) satellite tracking data and 'lumped coefficient' data. Procedures used in the EGM development, testing and evaluation are discussed with particular emphasis on orbital analysis results as they apply to Doppler point positioning. Keywords: Geodesy; Earth gravitational models; Satellite positioning.

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Document Details

Document Type
Technical Report
Publication Date
May 02, 1986
Accession Number
ADA166519

Entities

People

  • Haschal L. White

Tags

DTIC Thesaurus Topics

  • Altitude
  • Artificial Satellites
  • Cartography
  • Data Processing
  • Data Sets
  • Department Of Defense
  • Geodetic Satellites
  • Geosynchronous Satellites
  • Global Positioning Systems
  • Gravity Anomalies
  • Laser Tracking
  • Measurement
  • Satellite Orbits
  • Solar Radiation
  • Test And Evaluation
  • Tracking Stations
  • World Geodetic System

Readers

  • Computational Modeling and Simulation
  • Geodesy
  • Positioning, Navigation, and Timing (PNT) Technology.

Technology Areas

  • Directed Energy
  • Space
  • Space - Orbital Debris