Both temporal and spatial gradients of ionosphere errors have adverse effects upon local area augmentation system (LAAS). This article pro-poses a cascade dual frequency smoothing (CDFS) method to overcome this proble...Both temporal and spatial gradients of ionosphere errors have adverse effects upon local area augmentation system (LAAS). This article pro-poses a cascade dual frequency smoothing (CDFS) method to overcome this problem. One dual frequency smoothing filter is used to secure a precise estimate of ionosphere error,which is then used to modify ionosphere error in the code pseudorange measurement before it is put into another dual frequency smoothing (DFS) filter to attenuate noise. Thus,the ionosphere error is ...展开更多
基金National Natural Science Foundation of China (60672181)National High-technology Research and Development Program (2006AA12A101)
文摘Both temporal and spatial gradients of ionosphere errors have adverse effects upon local area augmentation system (LAAS). This article pro-poses a cascade dual frequency smoothing (CDFS) method to overcome this problem. One dual frequency smoothing filter is used to secure a precise estimate of ionosphere error,which is then used to modify ionosphere error in the code pseudorange measurement before it is put into another dual frequency smoothing (DFS) filter to attenuate noise. Thus,the ionosphere error is ...
