Method for refining geoid-like surface of flat strip-shaped water channel

• Main Authors: LIU LINJIA, LI PENG, WEI LINGFEI, FU QIANG, DAI YONGHONG, GUO ZHIJIN, ZHANG XIAOMENG, WU HAO, MAO BEIPING, ZHANG LINGYUAN, WEI MENG
• Format: Patent
• Language: Chinese; English
• Published: 13.10.2023
• Subjects: GYROSCOPIC INSTRUMENTS; MEASURING; MEASURING DISTANCES, LEVELS OR BEARINGS; NAVIGATION; PHOTOGRAMMETRY OR VIDEOGRAMMETRY; PHYSICS; SURVEYING; TESTING

The invention relates to a method for refining a quasi-geoid of a flat strip-shaped water channel, which is based on the earth gravitational field theory and technology, and applies a GNSS (Global Navigation Satellite System) technology and a high-precision quasi-geoid model, and the model considers the weights of GNSS/benchmarks with different precisions in the model refining process and properly resists the influence of gross error on a final result. On the premise of ensuring the precision of the elevation datum, the problem that time and labor are consumed in establishing the elevation datum in the past is solved, and the method can serve as important support for modernization of elevation measurement. The method shows good precision in construction of the elevation reference model of the flat strip-shaped water channel area in the Han river basin of Yangtze River, the accuracy and the applicability of the geoid refinement model of the flat strip-shaped water channel area can be greatly improved, and rapi