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《Science of Surveying and Mapping》 2011-01
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A synchronous survey method of highly precise data

LI Yu-guang①②,HUANG Feng-lou②,ZHOU Jian①,ZHANG Xiao-hu①(①College of Aerospace and Material Engineering,National University of Defense Technology,Changsha 410073,China;②Troops 61764,Hainan Sanya 572013,China)  
In the survey of the optical videograph,the acquisition of synchronous data is very important in the disposal of data after the event.Currently the technology of GPS is becoming mature which is precise and can be operated neatly.So this article actualized the communication between the computer and the GPS OEM based on VC++,after that it set a precise jumping-off point of time to the software of camera control,then there was a highly precise clock in process of photograph with the precise time of CPU,so every data was saved with the precise time.According to the result of experimentation,the precision could reach millisecond level,and could satisfy the synchronization requirement of optics videographic survey.
【CateGory Index】: P228.4
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