最近拜读了本校唐继权先生编著的《全球定位系统(GPS)测量》教材,受益匪浅。第一,它对本校传统测量教学是一个度的突破、质的转变;第二,为本校同行中有这方面高科技人才而感到兴慰;第三,授于唐先生教诲的弟子将是有幸。从1988年开始,由W...最近拜读了本校唐继权先生编著的《全球定位系统(GPS)测量》教材,受益匪浅。第一,它对本校传统测量教学是一个度的突破、质的转变;第二,为本校同行中有这方面高科技人才而感到兴慰;第三,授于唐先生教诲的弟子将是有幸。从1988年开始,由Wild Leitz china Limited向我省测绘专家全面介绍GPS技术。事实上,世界上先进国家在1987年以前已利用GPS技术完成了对南极考察的测绘工作。十余年来,GPS技术迅速发展,南方测绘仪器公司研制的NGS—200开创了我国GPS机的先列。为了使更多的人了解当今先进的测量技术,本文就GPS系统、GPS基本原理、GPS接收机、POPS—后处理软件、NGS—200GPS等五个方面进行分别阐述。展开更多
Because the signals of global positioning system （GPS） satellites are susceptible to obstructions in urban environment with many high buildings around, the number of GPS useful satellites is usually less than six. I...Because the signals of global positioning system （GPS） satellites are susceptible to obstructions in urban environment with many high buildings around, the number of GPS useful satellites is usually less than six. In this case, the receiver autonomous integrity monitoring （RAIM） method earmot exclude faulty satellite. In order to improve the performance of RAIM method and obtain the reliable positioning results with five satellites, the series of receiver clock bias （RCB） is regarded as one useful satellite and used to aid RAIM method. From the point of nonlinear series, a grey-Markov model for predicting the RCB series based on grey theory and Markov chain is presented. And then the model is used for aiding RAIM method in order to exclude faulty satellite. Experimental results demonstrate that the prediction model is fit for predicting the RCB series, and with the clock-based RAIM method the faulty satellite can be correctly excluded and the positioning precision of GPS receiver can be improved for the case where there are only five useful satellites.展开更多
文摘最近拜读了本校唐继权先生编著的《全球定位系统(GPS)测量》教材,受益匪浅。第一,它对本校传统测量教学是一个度的突破、质的转变;第二,为本校同行中有这方面高科技人才而感到兴慰;第三,授于唐先生教诲的弟子将是有幸。从1988年开始,由Wild Leitz china Limited向我省测绘专家全面介绍GPS技术。事实上,世界上先进国家在1987年以前已利用GPS技术完成了对南极考察的测绘工作。十余年来,GPS技术迅速发展,南方测绘仪器公司研制的NGS—200开创了我国GPS机的先列。为了使更多的人了解当今先进的测量技术,本文就GPS系统、GPS基本原理、GPS接收机、POPS—后处理软件、NGS—200GPS等五个方面进行分别阐述。
基金Project(20090580013) supported by the Aeronautic Science Foundation of ChinaProject(ZYGX2010J119) supported by the Fundamental Research Funds for the Central Universities,China
文摘Because the signals of global positioning system （GPS） satellites are susceptible to obstructions in urban environment with many high buildings around, the number of GPS useful satellites is usually less than six. In this case, the receiver autonomous integrity monitoring （RAIM） method earmot exclude faulty satellite. In order to improve the performance of RAIM method and obtain the reliable positioning results with five satellites, the series of receiver clock bias （RCB） is regarded as one useful satellite and used to aid RAIM method. From the point of nonlinear series, a grey-Markov model for predicting the RCB series based on grey theory and Markov chain is presented. And then the model is used for aiding RAIM method in order to exclude faulty satellite. Experimental results demonstrate that the prediction model is fit for predicting the RCB series, and with the clock-based RAIM method the faulty satellite can be correctly excluded and the positioning precision of GPS receiver can be improved for the case where there are only five useful satellites.
