摘要
GPS基线解算通常基于观测值独立且同精度的假设建立等权随机模型,在复杂环境下采用该模型往往无法满足高精度的定位要求。文中从研究卫星高度角、信噪比与GPS观测值质量之间的关系出发,利用卫星高度角、信噪比信息分别建立相应的精密随机模型。通过对试验结果分析对比,验证了基于卫星高度角和信噪比的随机模型的可靠性和其提高GPS定位精度的有效性。
In common practice, the GPS baselines are generally derived from such stochastic model as assume that the raw GPS measurements are statistically independent and have the same accuracy. In compli- cated circumstances, the simplified stochastic model will lead to unreliable positioning results for high precision GPS applications. Based on a research of satellite elevation, SNR and GPS raw measurements relationship, precise stochastic model is developed in this paper. Test results indicate that the accuracy and reliability of the estimated results are improved by the developed stochastic models.
出处
《测绘工程》
CSCD
2008年第4期54-58,共5页
Engineering of Surveying and Mapping
