Title :
Development of a GPS codeless receiver for ionospheric calibration and time transfer
Author :
Lee, Chang Bok ; Lee, Dong Doo ; Chung, Nak Sam ; Chang, Ik Soo ; Kawai, Eiji ; Takahashi, Fujinobu
Author_Institution :
Korea Res. Inst. of Stand. & Sci., Taejon, South Korea
fDate :
4/1/1993 12:00:00 AM
Abstract :
A Global Positioning System (GPS) dual-frequency codeless receiver, which has a design similar to that proposed by M. Imae et al. (1988), is developed for measurement of the total electron content in the ionosphere. The authors built a simulator to calibrate the codeless receiver and made calibrations with an accuracy of about 2-3 ns. Ionospheric measurements are made along the line of sight of the scheduled GPS satellites and time comparisons between KRISS (Korea Research Institute of Standards and Science) and CRL (Communications Research Laboratory) are carried out using the measured ionospheric delays at both sites under the common-view schedule of BIPM. The precision of time comparison is improved by using the measured ionospheric data
Keywords :
calibration; electron density; ionospheric electromagnetic wave propagation; ionospheric measuring apparatus; measurement standards; plasma; radio receivers; radiowave propagation; satellite relay systems; time measurement; BIPM; CRL; Communications Research Laboratory; GPS codeless receiver; Global Positioning System; KRISS; Korea Research Institute of Standards and Science; codeless receiver; dual-frequency codeless receiver; ionospheric calibration; ionospheric measurement; measured ionospheric delays; simulator; time comparison; time transfer; total electron content; Artificial satellites; Band pass filters; Calibration; Communication standards; Delay effects; Electrons; Frequency measurement; Global Positioning System; Ionosphere; Time measurement;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
