Surface-ship gravity meter measurements corrected for vertical accelerations

Dehlinger, Peter; Couch, Richard W.; Gemperle, Michael

doi:10.1029/jz071i024p06017

Cited by 11 publications

(3 citation statements)

References 6 publications

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“…Whereas the years 1963-1967 saw the better marine jravity measurements routinely achieve reliabilities vithin 5 to 6 mgal [Dehlinger et aL, 1966], the years 1967-1971 saw the reliabilities increase to 1 to 2 mgal e.g., Talwani, 1970;. The…”

Section: Marine Gravity Peter Dehlingermentioning

confidence: 99%

Marine gravity

Dehlinger

1971

EoS Transactions

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Section: Marine Gravity Peter Dehlingermentioning

confidence: 99%

Marine gravity

Dehlinger

1971

EoS Transactions

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“…The ship-borne marine gravity data are often collected in order to improve the accuracy of the near-coast marine geoid model. Since marine gravity observations are performed on a moving platform, several environmental and instrumental errors have to be taken into considerations (e.g., Dehlinger et al 1966;Talwani 1970;Harrison 1960). The principle of the marine geoid determination from the altimetry data is based on inverting the altimetry-derived gravity into a potential field.…”

Section: Introductionmentioning

confidence: 99%

Determining the Gravitational Gradient Tensor Using Satellite-Altimetry Observations over the Persian Gulf

et al. 2014

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With the advent of satellite altimetry in 1973, new scientific applications became available in oceanography, climatology, and marine geosciences. Moreover, satellite altimetry provides a significant source of information facilitated in the geoid determination with a high accuracy and spatial resolution. The information from this approach is a sufficient alternate for marine gravity data in the high-frequency modeling of the marine gravity field quantities. The gravity gradient tensor, consisting of the second-order partial derivatives of the gravity potential, provides more localized information than gravity measurements. Marine gravity observations always carry a high noise level due to environmental effects. Moreover, it is not possible to model the high frequencies of the Earth's gravity field in a global scale using these observations. In this article, we introduce a novel approach for a determination of the gravity gradient tensor at sea level using satellite altimetry. Two numerical techniques are applied and compared for this purpose. In particular, we facilitate the radial basis functions (RBFs) and the harmonic splines. As a case study, the gravitational gradient tensor is determined and results presented in the Persian Gulf. Validation of results reveals that the solution of the harmonic spline approach has a better agreement with a theoretical zero-value of the trace of the Marussi gravitational gradient tensor. However, the data-adaptive technique in the RBF approach allows more efficient selection of the parameters and 3-D configuration of RBFs compared to a fixed parameterization by the harmonic splines.

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“…Approximately 19 land-based pendulum stations had been occupied along the passage from a point just south of Skagway, Alaska, to Seattle, Washington, before 1938. Free-air, Bouguer, and isostatic anomalies were published for these stations [Heidcanen, 1939] The meter operation and the reliability of measurements have been described in the literature [LaCoste, 1959;Harrison, 1960;Allan et al, 1962;Dehlinger, 1964;Dehlinger et al, 1966]. Fathograms were recorded during all gravity measurements to provide water depths along the ship traverses.…”

Section: Introductionmentioning

confidence: 99%

Free-air gravity anomalies along the inside passage of British Columbia and Alaska

Dehlinger¹,

Gemperle²,

Couch³

et al. 1966

J. Geophys. Res.

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Continuous measurements were obtained by a LaCoste and Romberg surface‐ship gravity meter along canals, bays, channels, and fjords between Skagway, Alaska, and Seattle, Washington. Free‐air gravity anomalies were calculated along the traverses, usually at 1.5‐km intervals. Seas were calm and navigation excellent during nearly all of the measurements; the uncertainty in the measurements was ±2 mgal. The free‐air anomalies are between +25 and −165 mgal; in general, they are small near the coast line and become progressively more negative inland along the fjords. Most of the large negative anomalies north of Vancouver Island are caused by the topographic effect of the rugged terrain; the negative anomalies southeast of Vancouver Island in Puget Sound (northern part and near Seattle) are essentially of geologic origin. A map of the track lines and approximate free‐air anomaly contours is presented.

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Surface-ship gravity meter measurements corrected for vertical accelerations

Cited by 11 publications

References 6 publications

Marine gravity

Marine gravity

Determining the Gravitational Gradient Tensor Using Satellite-Altimetry Observations over the Persian Gulf

Free-air gravity anomalies along the inside passage of British Columbia and Alaska

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