Title :
An application of GPS dual frequency codeless receiver for ionospheric delay to single frequency VLBI observation
Author :
Imae, M. ; Kondo, T. ; Amagai, J. ; Kaneko, A. ; Miki, C.
Author_Institution :
Kashima Space Res. Center, Ibaraki, Japan
Abstract :
A dual-frequency codeless Global Positioning System (GPS) receiver for measuring ionospheric delay, called GTR-2, has been developed. Results of a feasibility study of using GTR-2 for single-frequency very-long-baseline interferometry (VLBI) experiments are presented. GTR-2 uses a cross-correlation property of the P-code signals transmitted from GPS satellites to measure ionospheric total electron content (TEC) with a measurement uncertainty of about 2*10/sup 16/ electrons/m/sup 2/ along the line of site to the satellite. Ionospheric compensation of the signal from radio stars is studied using the TEC data obtained from GTR-2.<>
Keywords :
ionospheric electromagnetic wave propagation; ionospheric techniques; measurement standards; radioastronomical techniques; radionavigation; radiowave interferometry; satellite relay systems; time measurement; GPS dual frequency codeless receiver; GPS satellites; GTR-2; Global Positioning System; P-code signals; VLBI; cross-correlation; ionospheric compensation; ionospheric delay; ionospheric total electron content; measurement uncertainty; observation technique; radio stars; radioastronomy; single-frequency very-long-baseline interferometry; Delay estimation; Electrons; Frequency estimation; Frequency measurement; Global Positioning System; Ionosphere; Mobile antennas; RF signals; Satellite broadcasting; Space stations;
Conference_Titel :
Precision Electromagnetic Measurements, 1990. CPEM '90 Digest., Conference on
Conference_Location :
Ottawa, Ontario, Canada
DOI :
10.1109/CPEM.1990.109902
