Seafloor Geodesy in Shallow Water With GPS on an Anchored Spar Buoy

Xie, Surui; Law, Jason; Russell, Randy; Dixon, Timothy H.; Lembke, Chad; Malservisi, Rocco; Rodgers, Mel; Iannaccone, Giovanni; Guardato, Sergio; Naar, David F.; Calore, Daniele; Fraticelli, Nicola; Brizzolara, Jennifer; Gray, John W.; Hommeyer, Matt; Chen, Jing

doi:10.1029/2019jb018242

i

Seafloor Geodesy in Shallow Water With GPS on an Anchored Spar Buoy

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2019
By Xie, Surui ; Law, Jason ; Russell, Randy ; ...

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Journal Title:

Journal of Geophysical Research: Solid Earth
Personal Author:

Xie, Surui ; Law, Jason ; Russell, Randy ; Dixon, Timothy H. ; Lembke, Chad ; Malservisi, Rocco ; Rodgers, Mel ; Iannaccone, Giovanni ; Guardato, Sergio ; Naar, David F. ; Calore, Daniele ; Fraticelli, Nicola ; Brizzolara, Jennifer ; Gray, John W. ; Hommeyer, Matt ; Chen, Jing
NOAA Program & Office:

OAR (Oceanic and Atmospheric Research)
Description:

Measuring seafloor motion in shallow coastal water is challenging due to strong and highly variable oceanographic effects. Such measurements are potentially useful for monitoring near‐shore coastal subsidence, subsidence due to petroleum withdrawal, strain accumulation/release processes in subduction zones and submerged volcanoes, and certain freshwater applications, such as volcano deformation in caldera‐hosted lakes. We have developed a seafloor geodesy system for this environment based on an anchored spar buoy topped by high‐precision GPS. Orientation of the buoy is measured using a digital compass that provides heading, pitch, and roll information. The combined orientation and GPS tracking data are used to recover the three‐dimensional position of the seafloor marker (anchor). A test system has been deployed in Tampa Bay, Florida, for over 1 year and has weathered several major storms without incident. Even in the presence of strong tidal currents which can deflect the top of the buoy several meters from vertical, daily repeatability in the corrected three‐component position estimates for the anchor is 1–2 cm or better.
Keywords:

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

Journal of Geophysical Research: Solid Earth, 124(11), 12116-12140
DOI:

https://doi.org/10.1029/2019jb018242
ISSN:

2169-9313 ; 2169-9356
Format:

PDF
Publisher:

American Geophysical Union (AGU)
Document Type:

Journal Article
Funding:

Grant no. NA16OAR4170181
Rights Information:

Other
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Library
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urn:sha-512:039fa979d8172850a0d4d2c6616f71d6d9a0d0684e03aa88b3c5cab1ee7e56561cdcee05c55363ab4fa03aa3c2a4f83b090f71507dad1ca7386bd81abae73c03
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https://repository.library.noaa.gov/view/noaa/59846/noaa_59846_DS1.pdf
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