Distributed computing method for adjustment of large-scale geodesic control net
A technology of distributed computing and control network, applied in measurement devices, instruments, surveying and navigation, etc., can solve the problem of not taking into account the performance of efficient distributed parallel computing
Inactive Publication Date: 2013-06-26
THE PLA INFORMATION ENG UNIV
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However, most of the relevant adjustment models and algorithms are written for the single-processor architecture, without taking into account the efficient distributed parallel computing performance brought by the current multi-machine multi-core hardware platform
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[0051] The specific implementation manners of the present invention will be described in detail below in conjunction with the accompanying drawings and examples.
[0052] 1) Decomposition of control network adjustment calculation tasks. A large amount of position information related to the spatial distribution of control points in the geodetic control network is obtained by means of electronic theodolite, electromagnetic wave rangefinder, total station, precision level, global navigation satellite system, laser satellite, and very long baseline interferometry observation technology. Observation data such as distance, angle, height difference, and baseline have the characteristics of spatial distribution and continuous collection. The adjustment calculation task established by a large amount of observation data is a relatively large-scale adjustment calculation task. The memory capacity of ordinary computers is limited, and it is difficult to solve the overall adjustment. Usin...
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The invention relates to a distributed computing method for the adjustment of a large-scale geodesic control net. The distributed computing method can realize efficient treatment of large-scale geodesic measurement data and is convenient to use. According to the technical scheme, the distributed computing method comprises the following steps of: decomposing a control net adjustment computing task, independently computing the adjustment of each subarea by a great amount of distance, angle, altitude difference and baseline observation data acquired by modern observation techniques and related to position information of control points distributed in the space in the geodesic control net, and subsequently connecting the subareas to a whole, wherein inner parameters among the subareas are independent with one other; and establishing an observation equation, decomposing the subareas of the geodesic control net, establishing a nonlinear error equation, resolving a normal equation, establishing adjustment computing service, achieving the distribution of the adjustment computing service, and performing iterative optimization on resolving results till the correction terms of all unknown parameters meet a resolving precision requirement. The distributed computing method of the adjustment of the large-scale geodesic control net is high in adjustment computing efficiency, improves the utilization efficiency of existing computing resources and has great economic and social benefits.
Description
technical field [0001] The invention relates to the technical field of "geodesy and surveying engineering" in the discipline of "surveying and mapping science and technology", in particular to a distributed computing method for large-scale geodetic control network adjustment. Background technique [0002] Establish a geodetic control network composed of a series of ground control points on a local or global scale, and study and measure the shape, size and changes of the earth through precise measurement of the three-dimensional position of the control points and their space-time variability, which can be used for surveying and mapping. Scientific fields such as engineering design and geodynamics provide control foundations, provide precise control information for the launch and operation of artificial satellites, long-range weapons and various spacecraft, and provide control guarantees for national economic and national defense construction. [0003] The current Global Navig...
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IPC IPC(8): G01C15/00
Inventor 吕志平崔阳陈正生黄令勇王宇谱吕浩
Owner THE PLA INFORMATION ENG UNIV