Precise Measurement Method for Ionospheric Total Electron Content Using Signals from GPS Satellites
Abstract
Communications Research Laboratory (CRL) has developed a GPS codeless receiver called "GTR-2" for measuring total electron content (TEC) along the line of sight to the GPS satellite by using the cross correlation amplitude of the received P-code signals carried by Ll(1575.42MHz) and 12 (1227.6MHz). This equipment has the performance of uncertainty in the measurement of TEC of about 2 x 10(16) electrons/m(2) when a 10 dBi gain antenna was used. To increase the measurement performance, CRL is planning an upper version of GTR-2 called GTR-3 which uses the phase information of the continuous signals obtained by making a cross correlation or multiplication of the received L1 and L2 P-code signals. BY using the difference of these measured phase values, we can estimate the ionospheric delay with the ambiguities of the periods of L1 + L2 and L1 -L2 signals. As the periods of these signals are about 3 ns and 0.3 ns respectively, then this method has the possibility of TEC measurement with the uncertainty of 1 or 2 times of 10(15) electrons/m(2) of TEC. Additionally to the precise measurement of TEC, this method has the ability of the precise measurement of the pseudo-range between the GPS satellite and the receiver for the precise positioning.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1990
- Accession Number
- ADA522577
Entities
People
- Akihiro Kaneko
- Chihiro Miki
- Hitoshi Kiuchi
- Michito Imae
- Shinichi Hama