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Research on the Inspection and the Application of GPS Kenimatic Surveying Technology in the Project of FAST

Author: RenHongFei
Tutor: ZhengYong
School: PLA Information Engineering University
Course: Geodesy and Survey Engineering
Keywords: GPS dynamic measurement Dynamic detection Data processing Wavelet Analysis BP neural network
CLC: P228.4
Type: Master's thesis
Year: 2008
Downloads: 29
Quote: 0
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Abstract


Currently, GPS dynamic measurement technology has been successfully applied to the excellent characteristics of its all-weather, day when many dynamic measurement field. With the the GPS modernization pace gradually advancing, the GPS dynamic measurement technology will continue to mature and perfect, will have a more extensive and in-depth applications in the field of dynamic measurement. FAST (Five-hundred-meter Aperture Spherical Telescope) is the the Chinese astronomers proposed building the world's largest single-caliber radio telescope proposals and engineering solutions. The project is to achieve high accuracy in a large-scale dynamic measurement requirements, low dynamic, high sampling rate of the real-time dynamic non-contact measurement, GPS technology has certain advantages in terms of dynamic measurement, therefore, research GPS technology FAST feed The source measurement will have a certain practical significance. This paper analyzes the dynamic detection platform construction principle and the detection performance; NovAtel DL4-plus GPS receiver and its associated data acquisition, data preprocessing, data post-processing software to use and handle set of receivers and its series of software in different measurement modes, different data acquisition modes, different data processing mode, the data processing performance under different treatment settings. Motion detection platform based on the the GPS dynamic single point positioning, differential measurement, and the dynamic baselines differential measurement mode of position measurement, speed measurement and movement baseline attitude measurement accuracy for detection and analysis, and come to some conclusions of the qualitative and quantitative. The application of wavelet transform technology of noise reduction the GPS dynamic measurement data processing, the extracted GPS dynamic measurement random error. BP neural network to the GPS dynamic measurement data for the sample design, the use of samples of different training functions, the different transfer functions and different number of neurons in the training, come to a specific training program and training network a generalization, in the planar direction 1cm generalization accuracy and elevation direction 2cm generalization accuracy. Dynamic measurements of GPS and total station measurements based on dynamic detection platform panning detection. 4 South GPS single frequency receiver and NovAtel DL4-plus receivers the experimental differential measurement of multi-base station, based on the initial program of the FAST feed tracking measurement.

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CLC: > Astronomy,Earth Sciences > Surveying and Mapping > Geodesy > Satellite geodesy and space geodesy > Global Positioning System (GPS)
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