函館におけるオメガ測定値の統計的考察-V : オメガによる測定位置の評価について

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Omega phase difference observations were made continuously at a fixed position (41゜48! 4N, 140゜43!3E) from February 1, 1974 till December 31, 1976, about A-D, A-C, C-D, A-H, C-H and D-H pairs. The statistics of each pair were calculated on the basis of one year of observation. From these results we have attempted to evaluate the accuracies of fixed positions with the above combinations. 1) Accuracies of determined positions when propagation corrections are carried out by the use of PPC tables The standard deviations around theoretical values (obtained by correcting the values shown in the PPC tables to the phase differences between the observation point and two stations) are indicated measured values have a normal distribution around each theoretical in Table 1 assuming that the value. Based on the δ of each pair and the intersecting angle of two position lines the radii of 95 per cent probability circles were calculated (Table 2). 2) Accuracies of determined positions when propagation corrections are carried out by the use of measured ones Each day was divided into 48 parts of 30 minutes and each month into 2 parts, thus a year was divided into 1152 parts, and all conditions were considered to be the same. The differences between the mean values and the measured values for each part presented observation errors, and the distribution around each mean value in the annual population was obtained by accumulating such errors over the 1152 groups respectively (Table 5 (a)). Based upon those data and the angles of cut the radii of 95 per cent probability circles were calculated and indicated in Table 6 (a).
社団法人日本航海学会の論文
1978-08-25

函館におけるオメガ測定値の統計的考察-V : オメガによる測定位置の評価について

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