利用GPS定位信息遥感大气风场的研究

介绍了GPS测风系统的构成、GPS接收机的性能指标和从GPS定位信息反演大气风场的方法,GPS接收机的性能指标与反演的风场数据的精度和可靠性关系密切.为了验证GPS测风技术的可靠性,进行了和风廓线仪、Vaisala探空的对比实验,结果表明:GPS探空和风廓线仪及Vaisala气球测风的结果相关性都很好,风速、风向廓线较为接近,但GPS测得的风速平均值比风廓线仪和Vaisala的测量结果均偏大.进一步分析了GPS测风产生偏差的原因,对误差做出合理的订正十分必要.

Remote Sensing of Wind Using Position Data of GPS

The structure of the GPS anemometric system, performances of the GPS receiver and method to obtain wind field of atmosphere from GPS position information are introduced. Performances of the GPS receiver are relative closely with accuracy of wind field data obtained. To prove the reliability of the GPS anemometric technique, contrast experiments with the wind profiler and Vaisala are carried out. The experimental results show that the correlativity between the wind data of GPS, wind profiler and Vaisala are perfect and profiles of wind speed and wind direction are close too. However, the mean value of wind speed measured by GPS is larger than that measured by wind profiler and Vaisala. It is important to analyze the reason for the differences and to make correction for the GPS method.