국내 최대 기계 및 로봇 연구정보

기술보고서

기술보고서 게시판 내용
타이틀	Flight Evaluation of Differential GPS for Terminal Area Operations
저자	Toshiaki TSUJII, Masaaki MURATA, Takatsugu ONO, Kazutoshi Ishikawa
Keyword	differential GPS; terminal area operation; flight experiment; differential correction filter; Selective Availability
URL	http://send.nal.go.jp/send/jpn/dlpdf.php3/naltr01210.pdf?id=NALTR0001210
보고서번호	NAL TR-1210
발행년도	1993.8
출처	NAL (National Aerospace Laboratory of Japan)
ABSTRACT	SA(Selective As Navcore-1) was equipped in the Do-228.The idential receiver was placed at a known (surveyed) location in the airport as a ground-reference.In a post flight analysis,navigation solutions were estimated by a DGPS navigation filter which had been developed by NAL.The filter consists of a ground reference differential correction filter(DCF) and an airborone navigation filter (ANF).Differential corrections to pseudorange and deltarange were computed and filtered by the DCF.Measurement data obtained by the airborne receiver were first differentially corrected,and then airplane position and velocity were estimated by the ANF.The airplane was tracked by a laser tracker,and the data was used to provide a reference profile of the airplane.This paper discribes the DGPS navigation system,the algorithm of the DGPS navigation filter,and the results of the post-flight analysis.Although GPS positioning error was previously about 95m,it was reduced to about 25m using the DGPS system.As GPS was under SA (Selective Availability) during flight experiments,the effectiveness of DGPS was demonstrated.