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고도를 고정한 GNSS 위치 결정 기법에서 고도 오차의 영향
조성룡(SungLyong Cho),한영훈(Young Hoon Han),김강식(SangSik Kim),문제형(JeiHyeong Moon),이상정(Sang Jeong Lee),박찬식(Chansik Park) 대한전기학회 2012 전기학회논문지 Vol.61 No.10
This paper analyzed the precision and accuracy of the altitude-aided GNSS using the altitude information from digital map. The precision of altitude-aided GNSS is analysed using the theoretically derived DOP. It is confirmed that the precision of altitude-aided GNSS is superior to the general 3D positioning method. It is also shown that the DOP of altitude-aided GNSS is independent of altitude bias error while the accuracy was influenced by the altitude bias error. Futhermore, it is shown that, since the altitude bias error influenced differently to each pseudorange measurement, the effect of the altitude bias error is more serious than clock bias error which does not influence position error at all. The results are evaluated by the simulation using the commercial RF simulator and GPS receiver. It confirmed that altitude-aided GNSS could improve not only precision but also accuracy if the altitude bias error are small. These results are expected to be easily applied for the performance improvement to the land and maritime applications.