Flight experiments of the differential (global positioning system) GPS (DGPS) navigation system were conducted by the NAL (National Aerospace Laboratory) at the Sendai airport. The system was used to evaluate the performance of the DGPS for airplane terminal area operations. The Dornier-228-200 (Do-228), an experimental research airplane, was used for the experiments. A C/A-code, 1 channel GPS receiver (Rockwell/Collins 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 airborne 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. The paper describes the DGPS navigation system, the algorithm of the DGPS navigation filter, and the results of the post-flight analysis.


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    Title :

    Flight Evaluation of Differential GPS for Terminal Area Operations


    Contributors:
    T. Tsujii (author) / M. Murata (author) / T. Ono (author) / K. Ishikawa (author)

    Publication date :

    1993


    Size :

    27 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English