Small-range dynamic GPS topographic surveying method

Abstract

The present invention discloses a small-range dynamic GPS topographic surveying method. Said method includes the following steps: first step, defining relative position of GPS base station and moving station, making distance of two station antennas be less than 29 cm; second step, slowly moving moving station, locking satellite according to traditional dynamic GPS location method,making continuous following observation; and third step, if the satellite is unlocked, again starting the above-mentioned surveying sequence in the known any point. Said method is simple, and can effectively raise surveying efficiency.

Description

technical field [0001] The invention relates to a carrier phase difference positioning measurement method, in particular to a small-range dynamic GPS terrain measurement method. Background technique [0002] GPS is a set of satellite navigation system established by the United States. The GPS beacons provided by it have become a global resource and have played a revolutionary role in navigation, surveying and other fields. Using two GPS receivers for synchronous measurement can accurately obtain the relative coordinates between the two GPS antennas. This method is called differential GPS measurement. Using the carrier phase difference positioning measurement method of GPS receivers can achieve high accuracy, especially When the distance between the two GPS receiver antennas used for measurement is not far, the typical value is between several meters and one kilometer, the measurement accuracy of centimeter level or even millimeter level can be achieved. In utilizing this te...

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Problems solved by technology

In utilizing this technology, a primary problem that must be solved is to correctly determine the integer ambiguity of the carrier phase measurement. In the prior art, there are mainly the following two methods: 1. In two coordinates of known relative coordinates The method of placing the receiver antenna on the point for observation, and then solving the ambiguity of the whole circle according to the known relative coordinate position, this method is relatively reliable, but the operation needs to pre-set two antenna placement points with known relative coordinates, which requires 2. Place receiving antennas at two points with unknown relative coordinates, conduct continuous observations for 15 to 25 minutes, and then use long-term continuous observation data to solve the ambiguity of the whole cycle. Set known coordinate points, but it takes a long time for continuous observation, and also increases the efficiency of satellite unlocking, which brings some inconvenience to positioning

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