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.
The authors mark the main historical events of the St. Petersburg Mining University’s Department of Engineering Geodesy hundred-year work. A great experience in Surveying theory and practice started in the times of Peter the Great was accumulated. The beginning of Russian Surveying skills forming dates at 1701 with foundation of “Navigation and Mathematic Sciences school” in Moscow. Beside engineers and gunners, surveyors were trained there. In 1715 navigation classes moved to St. Petersburg; on their base the Nautical academy was founded. In the first technical higher educational institution of Russia, St. Petersburg Miming University (at that time Mining School), the basic subjects were land- and underground Surveys. In the USSR industrializing of the country was started, so the part of Geodesy in it was among the main ones. Well-trained technical personnel were required. The Department occurred to be one of the first in the country. The history of its creating, establishment and development is given in brief. The main attention is paid to the Chairmen of the department, their achievements, scientific interests, tasks they were facing and solutions. The results of the research work which made a significant contribution in Geodetic science are also shown.
The article is devoted to the famous scientist-surveyor, mining engineer and cartographer, a captain of the geodetic detachment, Kliment Aleksandrovich Zvonarev (1902–1986). K. A. Zvonarev went from a student of the Leningrad Mining Institute (graduated in 1928) to Doctor of Technology (1953) and professor (1954). From 1929 to 1957 he taught at the Leningrad Mining Institute (since 1935 – associate professor, since 1954 – professor), in the period of 1957–1978 he headed the Department of Cartography in Leningrad State University. Participant of the Great Patriotic War of 1941–1945. He served in the engineering units of the Leningrad, Volkhov and Karelian fronts as the topographic department head’s assistant, military engineer and engineer-captain of the geodetic service. He was awarded the Order of the Red Star (1942), Badge of Honor (1948), medals For the Defense of Leningrad (1943), For the Victory over Germany (1946), For Labor Valor (1950), In Memory of the 250th Anniversary of Leningrad (1957), 20 years of Victory in the Great Patriotic War (1966). The authors provide information on working, the main scientific achievements and recollections by Kliment Alexandrovich about his participation in battles.
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