1) Alfred Leick: GPS Satellite Surveying, John Wiley & Sons, pp. 204-213, 1990.
2) B. Wanless, G. Lachapelle: NOVAS-an automated program for precise reduction of GPS Static carrier phase observations, Manuscripta Geodaetica, Vol. 13, No. 4, 1988.
3) 村田一郎: GPSにおける衛星の選択, 日本測地学第74回公演会要旨, pp. 25-26, 1990.