Preliminary Evaluation of Doppler-Determined Pole Positions Computed Using World Geodetic System 1984.

Abstract

Since 1975, the Defense Mapping Agency (DMA) has been determining polar motion as a byproduct of computing the precise orbits of the Navy Navigation Satellite System (NNSS) satellites. The orbit determination process currently incorporates the NSWC 9Z2 terrestrial reference system and the NWL 1OE-1 Earth Gravitational Model (EGM) to degree 28 and order 27. The World Geodetic Systme 1984 (WGS 84), developed by DMA, will replace the NSWC 9Z2/1OE-1 system for NNSS orbit determination. The WGS 84 EGM to degree and order 41 will be used. This paper presents the results of two experiments which compared pole positions computed in the two systems. These comparisons indicate that use of WGS 84 improves agreement between pole position values resulting from the Nova-class satellite oorbit solutions and the values determined by other modern techniques. Keywords: Nova satellite; and Oscar satellite.

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Document Details

Document Type
Technical Report
Publication Date
Oct 01, 1986
Accession Number
ADA173467

Entities

People

  • James P. Cunningham
  • John A. Bangert

Tags

Communities of Interest

  • Space

DTIC Thesaurus Topics

  • Agreements
  • Artificial Satellites
  • Cartography
  • Classification
  • Computational Processes
  • Coordinate Systems
  • Geodesy
  • Global Positioning Systems
  • Grids
  • Navigation
  • Navigation Satellites
  • Satellite Orbits
  • Security
  • Statistics
  • Tracking Stations
  • World Geodetic System

Readers

  • Aerospace Engineering
  • Aerospace Engineering.
  • Geodesy

Technology Areas

  • Space
  • Space - Orbital Debris