The study of ionospheric phase delay measured by the carrier from GPS satellite
Abstract
To measure the influences of the ionosphere on satellite communications and precise satellite measurements, it is necessary to observe the total electron content (TEC) through the ionosphere. This paper describes the results of two-frequency-carrier-phase delay measurements of radio waves from the Global Positioning System (GPS). The phase difference between the two frequencies (1.6 and 1.2 GHz) is proportional to TEC along the line of sight to the GPS. The measurements were performed at the Earthquake Research Institute of Tokyo University. The precision of this method is shown to be about 1000 times higher than that of conventional group-delay methods, making it possible to measure even small ionospheric disturbances.
- Publication:
-
Communications Research Laboratory Review
- Pub Date:
- March 1990
- Bibcode:
- 1990CRLRv..36R..39K
- Keywords:
-
- Global Positioning System;
- Ionospheric Electron Density;
- Ionospheric Propagation;
- Radio Waves;
- Satellite Communication;
- Ionospheric Disturbances;
- Line Of Sight;
- Phase Shift;
- Communications and Radar