Development of Web Positioning Services using Cloud and Grid Computing

本研究的目的是通过Web提供精确定位服务，提高定位信息的利用率，降低精确定位技术和数据的成本。为实现上述研究目标，1）开发了低成本的全球导航卫星系统（GNSS）接收机支持的准天顶卫星系统（QZSS）解码方案，以提高城市峡谷等低天空能见度地区的定位精度。2)通过实验验证了所开发的解码程序能够正确处理。3)实现了标准的Web服务定位流程，以支持各种客户端和申请其他服务。4)在网格/云计算平台中实现Web服务，以处理来自用户的大量进程或大量Web请求。

This research aims at promoting the utilization of positioning information and lowering costs on accurate positioning technologies and data by providing accurate positioning services through the Web. To achieve the research objectives, 1) developed decoding programs for Quasi-Zenith Satellite System (QZSS) supported low-cost Global Navigation Satellite System (GNSS) receiver, which could enhance positioning accuracy in the places with low sky visibilities such as urban canyons. 2) conducted some experiments to verify the developed decoding programs to process properly. 3) implemented standard Web services for positioning processes in order to support various clients and apply for other services. 4) implemented Web service into Grid/ Cloud computing platform to handle heavy amount of processes or a large number of Web requests from the users.