Accession Number : ADD016358

Title :   Apparatus and Method for Ionospheric Mapping.

Descriptive Note : Patent Application, filed 3 May 94,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Gardner, Sheldon B

Report Date : 03 May 1994

Pagination or Media Count : 29

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 nighttime data.

Descriptors :   *GLOBAL POSITIONING SYSTEM, *IONOSPHERE, *PATENT APPLICATIONS, *ELECTRON DENSITY, *NAVIGATION SATELLITES, ARTIFICIAL SATELLITES, FREQUENCY, INVENTIONS, L BAND, MAPS, RECEIVERS, SPACECRAFT

Subject Categories : Atmospheric Physics
      Navigation and Guidance

Distribution Statement : APPROVED FOR PUBLIC RELEASE