Error analyses of relative positioning using GPS time comparison data.

概要

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Relative positionings are carried out by a, simplified method to improve the precision of the time comparison only using GPS time comparison data. Positioning precision is obtained by the repeatability of positioning results to be a few meters. Precision is also evaluated by the closure errors to be approximately a few meters when the distance between stations is up to 1000 km. When the distance is about 100 km, the difference of positioning results between our method and the VLBI method is approximately lm. This shows the same level of uncertainties of ground surveys. Positioning precision of better than a few meter is required to carry out the time comparison via GPS with a precision of better than 10 nanoseconds (ns). As a result, the precision of our positioning method is sufficient to obtain a precision of 10 ns in time comparison via GPS.
日本測地学会の論文