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Sub-daily noise in horizontal GPS kinematic time series due to thermal tilt of GPS monuments

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Abstract

The sub-daily noise in horizontal global positioning system (GPS) kinematic time series arising from monument tilts is quantitatively evaluated using tiltmeter data at GPS stations from the Japanese nationwide global navigation satellite system network. The estimated tilt-induced monument displacements show characteristics that are typical of those caused by thermal tilts of the monuments. The root mean square of the displacements is typically a few millimetres, with notable inter-seasonal variations. The stacked amplitude spectra of the monument displacements have peaks at the tidal bands S1 and S2, and their higher tones. The peaks at the S1 and S2 bands in the amplitude spectra are reduced by 41 and 43 % for the north–south component and 36 and 53 % for the east–west component, respectively, after correcting for the monument displacements. The monument displacements due to the thermal tilts of the monuments may also be a favourable candidate for sub-daily noise at the S1 and S2 bands found in other GPS networks.

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Acknowledgments

I thank the Japan Meteorological Agency for the meteorological data used in this study. I am grateful to three anonymous reviewers for their insightful comments and suggestions.

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  1. Geospatial Information Authority of Japan, 1 Kitasato, Tsukuba, Ibaraki, 3050811, Japan

    Hiroshi Munekane

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  1. Hiroshi Munekane
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Correspondence to Hiroshi Munekane.

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Munekane, H. Sub-daily noise in horizontal GPS kinematic time series due to thermal tilt of GPS monuments. J Geod 87, 393–401 (2013). https://doi.org/10.1007/s00190-013-0613-8

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  • DOI: https://doi.org/10.1007/s00190-013-0613-8

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