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《Electronic Design Engineering》 2011-14
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A barometric altimetry method based on MS5803 and meteorological data

ZHAO Tian-cheng1,RAO He-chang2(1.School of Remote Sensing and Information Engineering,Wuhan University,Wuhan 430079,China;2.School of Mechanical Science and Engineering,Huazhong University of Science and Technology,Wuhan 430074,China)  
In portable navigation systems,it is required to be solved how to compensate climate change on barometric altimetry accuracy and stability.To this end,an altimetry method based on MS5803 high-precision digital barometric sensor and local meteorological data was presented.From the standard barometric altimetry formula,a barometric altimetry equation was derived,in which any position within the same atmospheric layer can be used as a reference point.With this equation,taking a local weather station as a reference point,it's geographic location and quasi-real-time meteorological data accessed through the Internet,more accurate and stable barometric altimetry can be carried.A barometric altimetry prototype was constructed with an MS5803-01AB barometric sensor and a notebook PC.Experiment results show that at locations more than 20 kilometers away from the local weather station,altitude errors are less than 3m,the measured altitude drift of a fixed point was less than 4m in 13 hours.
【CateGory Index】: P412
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