| Budget Amount *help |
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2016: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2015: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2014: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
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| Outline of Final Research Achievements |
Since the error of the vertical direction is generally larger than a horizontal error in the satellite-based positioning, the improvement of vertical accuracy is required in order to apply satellite-based positioning to survey and construction. A method of selection of satellite waves for positioning calculation has been investigated to improve the vertical accuracy in this study. As a result, it was shown to be effective to exclude the satellite waves from positioning calculation which were assumed to be influenced by ionospheric delay judged by the index of DPC. A combination of one satellite with more than 70 degrees of elevation and 3 satellites located at low elevation with more than 15 degree were effective to improve the vertical accuracy. Also it was shown that the vertical accuracy improved according to the elevation angle of the satellite with highest elevation, and it was advantageous to use QZSS satellite than a GPS satellite as the satellite with highest elevation.
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