Offshore Sea Levels Measured With an Anchored Spar‐Buoy System Using GPS Interferometric Reflectometry

Xie, Surui; Chen, Jing; Dixon, Timothy H.; Weisberg, Robert H.; Zumberge, Mark A.

doi:10.1029/2021JC017734

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Offshore Sea Levels Measured With an Anchored Spar‐Buoy System Using GPS Interferometric Reflectometry

2021
By Xie, Surui ; Chen, Jing ; Dixon, Timothy H. ; ...
Source: Journal of Geophysical Research: Oceans, 126(11)

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Journal Title:

Journal of Geophysical Research: Oceans
Personal Author:

Xie, Surui ; Chen, Jing ; Dixon, Timothy H. ; Weisberg, Robert H. ; Zumberge, Mark A.

Xie, Surui ; Chen, Jing ; Dixon, Timothy H. ; Weisberg, Robert H. ; Zumberge, Mark A. Less -
NOAA Program & Office:

NOS (National Ocean Service)
Description:

Conventional tide gauges are usually housed along the coast. Satellite altimetry works well in the open ocean but poorly near the coast due to signal contamination by land returns. These limitations lead to an observational gap in the transition zone between the coast and open ocean. Using data collected by a GPS installed on top of an anchored spar-buoy in Tampa Bay, we retrieved water levels through a combination of precise positioning and interferometric reflectometry. Individual water level retrievals agree with a nearby acoustic tide gauge (19.5 km distance) at ∼15 cm level. Amplitude and phase of the major tidal constituents are well recovered by the GPS spar-buoy measurements. Over a 2.9-year period, agreement of de-tided daily mean sea levels measured by the GPS spar-buoy and the nearby acoustic tide gauge is 4.4 cm. When sea level data measured by the GPS spar-buoy are included in the local coastal ocean circulation model, low-frequency error propagated from the open boundary is significantly reduced.
Keywords:

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Earth And Planetary Sciences (miscellaneous) Geochemistry And Petrology Geophysics Oceanography Space And Planetary Science
Source:

Journal of Geophysical Research: Oceans, 126(11)
DOI:

https://doi.org/10.1029/2021JC017734
ISSN:

2169-9275;2169-9291;
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PDF
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American Geophysical Union (AGU)
Document Type:

Journal Article
Funding:

Grant no. NA20NOS4000227
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Submitted
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urn:sha256:94b524569188b6a502439b69a8af032da0310eadb9dbb924e940e358d13c36ff
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https://repository.library.noaa.gov/view/noaa/49190/noaa_49190_DS1.pdf
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Offshore Sea Levels Measured With an Anchored Spar‐Buoy System Using GPS Interferometric Reflectometry

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