Small-range dynamic GPS topographic surveying method

A topographic measurement and small-scale technology, applied in the direction of measuring devices, radio wave measurement systems, instruments, etc., can solve the problems of high requirements and increase the efficiency of satellite unlocking

A topographic measurement and small-scale technology, applied in the direction of measuring devices, radio wave measurement systems, instruments, etc., can solve the problems of high requirements and increase the efficiency of satellite unlocking

CN1580811AInactive Publication Date: 2005-02-16INST OF MECHANICS - CHINESE ACAD OF SCI
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  • Small-range dynamic GPS topographic surveying method
  • Small-range dynamic GPS topographic surveying method
  • Small-range dynamic GPS topographic surveying method

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Experimental program
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Effect test

Embodiment Construction

[0012] The implementation of the present invention will be further described in detail below with reference to the accompanying drawings.

[0013] Such as figure 1 As shown, the two GPS receivers 1 and 2 used for carrier phase differential positioning measurement are connected to their corresponding antennas 5 and 6 through cables 3 and 4, and the antennas 5 and 6 are placed on the same point 7, after Short-term measurement and solution to determine the integer ambiguity of the carrier phase observation, and then, as figure 2 As shown, slowly move the antenna 6 corresponding to the receiver 2 to a new positioning point 8, and lock the satellite according to the traditional dynamic GPS positioning method, and perform continuous and uninterrupted tracking observation.

[0014] Such as image 3 As shown, when the antenna 6 of the receiver 2 moves to the point 9, the satellite unlocking phenomenon occurs, and the above steps are restarted from the known point 8.

[0015] All i...

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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...

Claims

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Application Information

Patent Timeline
16 Feb 2005
Publication
CN1580811A
IPC
G01S5/06
Inventors
丁桦; 张均锋