Application of mathematical programming and modeling methods for monitoring the technical condition of underwater crossings of main gas pipelines

Abstract

The article deals with the problem of geodetic monitoring of the technical condition of underwater gas pipeline crossings. The theoretical scheme of increasing the accuracy of depth determination is studied in detail. In this paper, the goal is to increase the accuracy of obtaining the depth of the gas pipeline. The accuracy of the planned position for the largest survey scale (1:500) is 0.75 meters and is achieved using satellite equipment, even without the use of a dynamic positioning system, which allows, if necessary, to increase the accuracy of the data obtained by determining the orientation angles of the vessel. Despite the high popularity of this complex, the accuracy of depth measurements does not correspond to regulatory documents, which raises the question of the need to change the method of measurement and data processing, since the performance of work on monitoring the technical condition of gas pipelines is an important and relevant task. In order to control the developed methodology and automate measurement processing, two programs were written in the Python 3.7 programming language in the Spyder environment.

Integration of GNSS Technology and Geometric Levelling for Accurate Height Determination in Uneven Terrains: A Case Study in Lebanon

“…After determining the adjusted height difference, the least squares method (LSM) was applied in order to minimize the errors as much as possible. The LSM is expressed in the equations (5)(6)(7)(8)(9)(10)(11).…”

“…By default, GNSS is integrated with global models such as EGM2008. The specific choice of EGM2008 was mainly due to its wide application and high resolution [7][8][9]. Although the latest models of the global gravitational field, such as: EIGEN 6C4, EIGEN-6C2, EIGEN-6C3stat are considered more accurate, the practical results of their use (K.I.…”

Accurate Height Determination in Uneven Terrains with Integration of Global Navigation Satellite System Technology and Geometric Levelling: A Case Study in Lebanon

“…By default, GNSS is integrated with global models such as EGM2008. The specific choice of EGM2008 was mainly due to its wide application and high resolution [7][8][9]. Although the latest models of the global gravitational field, such as EIGEN 6C4, EIGEN-6C2, and EIGEN-6C3stat, are considered more accurate, the practical results of their use (K.I.…”