ESTIMATION OF THE POTENTIAL ERROR IN CLARIFYING THE COORDINATES OF A MOVING OBJECT ACCORDING TO THE DATA OF A MODERN SATELLITE MODEL OF THE EARTH'S GRAVITATIONAL FIELD
Schmidt Institute of Physics of the Earth, Russian Academy of Sciences
Journal: Geophysical research
Tome: 25
Number: 4
Year: 2024
Pages: 91-109
UDK: 550.831.015: 550.831.3: 528.27
DOI: 10.21455/gr2024.4-5
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Valov
P.S G.E. ESTIMATION OF THE POTENTIAL ERROR IN CLARIFYING THE COORDINATES OF A MOVING OBJECT ACCORDING TO THE DATA OF A MODERN SATELLITE MODEL OF THE EARTH'S GRAVITATIONAL FIELD
// . 2024. Т. 25. № 4. С. 91-109. DOI: 10.21455/gr2024.4-5
@article{Valov
P.SESTIMATION2024,
author = "Valov
P.S, G. E.",
title = "ESTIMATION OF THE POTENTIAL ERROR IN CLARIFYING THE COORDINATES OF A MOVING OBJECT ACCORDING TO THE DATA OF A MODERN SATELLITE MODEL OF THE EARTH'S GRAVITATIONAL FIELD
",
journal = "Geophysical research",
year = 2024,
volume = "25",
number = "4",
pages = "91-109",
doi = "10.21455/gr2024.4-5",
language = "English"
}
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Keywords: Earth’s gravitational field, gravity anomalies, potential field navigation, marine gravimetry, regression analysis, World Ocean.
Аnnotation: The article is devoted to the study of the possibility and accuracy of correction the coordinates of a moving object according to the data of a modern satellite model of the Earth's gravitational field. A software implementation of modeling the readings of strapdown inertial navigation systems (SINS) is presented. Based on the analysis of various sources and modeling of the route corresponding to a real marine scientific expedition, the optimal parameters of the SINS modules were obtained. An algorithm for clarifying the coordinate position of a moving object based on the coordinate descent method is proposed. The regression analysis method was used to derive a formula for the relationship between the mean square error of the gravimetric map and the horizontal gradient of the gravity anomaly (GA). A number of experiments were carried out to clarify the coordinate position in areas characterized by different GA gradients with modeling of the errors of the relative gravimeter and gravimetric map. As a result of experiments, it was found that the determination of the coordinate position according to model gravity data is possible with an accuracy of 100 to 1900 meters in areas with “large” GA gradients (from 2 to 6 mGal/km) and from 100 to 6400 meters in areas with “small” GA gradients (up to 2 mGal/km), depending on the type and magnitude of the errors.