Development of GPS Positioning System "PRESTAR"

Application of Space Techniques to Geodesy and Geodynamics in Japan.

“…Broken arrows and oval are the predicted displacement and its 2 sigma, respectively (after Matsuzaka et al, 1991) From 1988 to 1989, a series of mobile VLBI experiments were performed at the following CRL stations; the headquarters in Koganei, Wakkanai radio observatory in Hokkaido, and Okinawa radio observatory. The aim of these experiments was to test the performance of this station and to establish reference points for determining the precise orbit of GPS satellites (Sugimoto et al, 1989). The highly transportable VLBI station was also moved to Minami-daito island on the Philippine Sea plate as part of CRL's Western Pacific VLBI Network as described in the following section.…”

“…It employs a microstrip array antenna which is directed to a satellite under the control of a micro computer. A rubidium oscillator is employed for a highly stable reference signal (Sugimoto et al, 1989). Sugimoto et al (1989) made an experimental observation using PRESTAR at the Tsukuba baseline which has well been established by VLBI.…”

“…A rubidium oscillator is employed for a highly stable reference signal (Sugimoto et al, 1989). Sugimoto et al (1989) made an experimental observation using PRESTAR at the Tsukuba baseline which has well been established by VLBI. The difference of baseline lengths between VLBI and GPS was about 3cm.…”