2008 年 54 巻 2 号 p. 69-79
A quality control system for the global network of the International Laser Ranging Service (ILRS) has been developed utilizing the precise orbit determination technique. Laser-range obser- vation data for as many as 15 satellites are being processed every day within 24 to 48 hours after ranging observations, and the quality control numerical tables are available via web, ftp and email. The analysis reports, formerly provided by National Institute of Information and Communications Technology and currently by Hitotsubashi University, are widely used for detecting and alerting various kinds of problems.