Accession Number : ADD017604

Title :   Apparatus and Method for Ionospheric Mapping.

Descriptive Note : Patent, Filed 3 May 94, patented 27 Jun 95,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Gardner, Sheldon B

Report Date : 27 Jun 1995

Pagination or Media Count : 11

Abstract : This invention is a unique single site method of determining the local total electron content (TEC) of the ionosphere and its space time variation using a global positioning system (GPS) ionospheric receiver. The TEC of the ionosphere is specified in terms of a space time map of the local TEC in the vicinity of the receiver. Differential group and phase path data between two L-band frequencies (L1 and L2) for a plurality of the GPS satellites in view of the receiver station are analyzed by a least squares technique to extract both the ten parameters of a full second order space time polynomial expansion for the vertical TEC (vTEC) and the differential delay biases associated with the space vehicles (SVs). The method is applicable to day and nightime data.

Descriptors :   *IONOSPHERE, *ELECTRON DENSITY, *PATENTS, SPACECRAFT, VARIATIONS, GLOBAL POSITIONING SYSTEM, RECEIVERS, LEAST SQUARES METHOD, MAPS, MAPPING

Subject Categories : Atmospheric Physics
      Electrical and Electronic Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE