| 内容提要: |
The topic is mainly divided into four parts.The first part is the introduction of the background;the second part is the basic principle of precise point positioning by GPS and BDS;the third part tells that using the State-Space Representation correction products based on Radio Commission for Maritime Services (RTCM-SSR), Fuxin Yang et al. develop a GPS/BDS real-time kinematic maritime PPP. On the one hand, a piece-wise method is adopted to estimate the ZWD and the horizontal gradient.On the other hand, a robust sequential least squares (RSLSQ) PPP estimator is adopted based on IGG-III model to restrain the unmolded gross error.And the last part tells the advantages of the new method and gives some quantity results to display its advantages. |