Validation of the Parameterized Real-Time Ionospheric Specification Model (PRISM) Version 1.6B Using Topex Total Electron Content (TEC) Data.

Abstract

The ability of the most recent version of PRISM (1.6b) to accurately specify real-time TEC values was validated against 'ground truth' TEC data obtained by the Ocean TOPography EXperiment (TOPEX). PRISM 'driver' data came from two sources: the ground-based Digital Ionospheric Sounding System (DISS - critical frequencies and layer heights) and the International Global Positioning System (GPS) Service for Geodynamics (IGS OPS - TEC values). The TEC 'ground truth' data were obtained by the NASA dual-frequency radar altimeter on-board the TOPEX satellite during 1995. 950 TEC estimates obtained from PRISM 1.6b were compared with corresponding values observed by the TOPEX satellite along multiple orbital tracks. Comparison points were chosen to be representative of different seasons (Equinox, Summer, and Winter), local times (OOOOL, 0600L, 1200L, and 1800L), and latitudes (30 deg N and equatorial). The results of PRISM-TOPEX chi-square goodness-of-fit calculations are presented to quantify the accuracy of PRISM across seasons, local times, latitudes, and varying subsets of input data.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1996
Accession Number
ADA321150

Entities

People

  • R. D. Coxwell

Organizations

  • Air Force Institute of Technology

Tags

Communities of Interest

  • Space

DTIC Thesaurus Topics

  • Air Force
  • Altitude
  • Artificial Satellites
  • Climate Change
  • Department Of Defense
  • Electric Fields
  • Electron Density
  • Electrons
  • Environment
  • Global Positioning Systems
  • Grids
  • High Latitudes
  • Ionosphere
  • Ionospheric Models
  • Latitude
  • Measurement
  • Meteorological Satellites

Fields of Study

  • Environmental science

Readers

  • Astronomy and Astrophysics.
  • Computational Modeling and Simulation

Technology Areas

  • Microelectronics
  • Space