重力計による地球潮汐の観測
―その2,3の問題点について―
1969 年 15 巻 2-3 号 p. 41-52
詳細
1969 年 15 巻 2-3 号 p. 41-52
Three methods of analysis of earth tides-Lecolazet's, least square's and Fourier integral's-were compared with each others using one month's data obtained with an Askania gravimeter in Kyoto, Japan. Both a modified Lecolazet's method to exclude systematic errors of analysis and the least square's method assumed to be present seven components of tides, give excellent results in gravimetric factor and phase lag, using hourly values covering the duration of one month. Observational data obtained in Kyoto (December 1967-March 1968) and those in Mizusawa (November 1967-February 1968) were analyzed continuously by means of the modified Lecolazet's method. These analyses show a similar variation in gravimetric factor and phase lag, and it is considered to be a part of seasonal variation in comparison with the previous observation made in Kyoto (August 1959-August 1960). Further, the present results for gravimetric factor give greater values, in general, than the previous ones. This suggests secular change or long period variation in gravimetric factor.
