Optimization method for sea island reef height transmission

Abstract

The invention discloses an optimization method for sea island reef height transmission and belongs to the technical field of geodesy and measuring engineering. Leveling is a conventional method with the advantages of most directness and effectiveness, highest precision and widest application during height transmission, and the using range thereof is influenced in some special areas, for example, during sea island reef height transmission, because leveling equipment cannot be stably used on sea surface, a method for directly measuring the height by using a leveling instrument cannot be used. Therefore, the invention provides an optimization method for sea island reef height transmission, which comprises the following steps of: highly integrating land, coastal zone and sea island gravity data; calculating a land and transmitted sea island reef consistent high-precision whole gravity quasigeoid numerical model through space gravitational abnormal data corrected by height reference system difference; and finally measuring the GPS geodetic height of the known height and the GPS geodetic height of a sea island reef point to be measured by using the known height point in a calculation region so as to finish the height transmission of the sea island reef.

Description

technical field The invention relates to an optimization method for elevation transfer of sea islands and reefs, and belongs to the technical field of "physical geodesy" in the subject of "geodesy and surveying engineering". Background technique At present, the most accurate and most widely used height measurement method is leveling measurement. It is usually stipulated that the first and second leveling surveys need to carry out precise leveling measurement and gravity data must be measured on the corresponding leveling route, while the third and fourth leveling And for leveling outside the level, gravity measurement is not required. my country's elevation datum network is established based on leveling. In fact, due to the inherent limitations of leveling, it cannot play a role in cross-sea elevation transfer. At present, the use of triangular elevation transfer in short-distance cross-sea elevation transfer (generally less than 10km) can also achieve higher accuracy, whi...

AI Technical Summary

Problems solved by technology

In fact, due to the inherent limitations of leveling, it cannot play a role in cross-sea elevation transfer

At present, the use of triangular elevation transfer in short-distance cross-sea elevation transfer (generally less than 10km) can also achieve higher accuracy, while in the farther distance cross-sea elevation transfer due to the influence of various factors such as atmospheric refraction, the Result accuracy cannot be guaranteed

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