Proceedings to the Scientific Assembly of the International
Association of Geodesy, 1997, held at Rio de Janeiro, Brazil,
from September 2 to September 9, 1997.
Abstract
A space geodetic observation network has been established around Tokyo,
Japan under a project name of Key Stone Project by Communications
Research Laboratory. Three space geodetic methods, i.e. Very Long
Baseline Interferometry, Satellite Laser Ranging, and Global Positioning
System, are involved in the project. As of September, 1997, VLBI and GPS
observation facilities at all four stations are operational, whereas
developments of SLR observation facilities are in course of final
alignment procedures. Daily VLBI observations began in January 1995
with a single baseline between Koganei and Kashima, and the full network
observations with four stations began in September 1996. Observations
and data analysis of VLBI measurements are fully automated and the
analysis results are produced shortly after all observations of an
experiment session finished. GPS observations at four sites began in July
1997 and the automatic data collection and analysis system are under
developments.