The use of terrain elevation databases in advanced guidance and navigation systems has greatly expanded. However, the limitations and accuracies of these databases must be considered and established prior to safe system flight evaluation. A simple approach to quantify reasonable flight limits is presented and evaluated for a helicopter guidance system dependent on a terrain database. The flight test evaluated involved a helicopter equipped with a Global Positioning System (GPS) receiver and radar altimeter, and a ground station GPS receiver which provided improved helicopter positioning. The precision navigation and radar altimeter data was acquired while flying low-altitude missions in south-central Pennsylvania. The aircraft-determined terrain elevations were compared with the terrain predicted by the Defense Mapping Agency (DMA) Level 1 terrain elevation data for the same area. The results suggest a safe set clearance altitude of 220 ft for flight testing of a DMA-based guidance avionic in the same area.


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    Titel :

    Appraisal of Digital Terrain Elevation Data for Low-Altitude Flight


    Beteiligte:
    R. E. Zelenka (Autor:in) / H. N. Swenson (Autor:in)

    Erscheinungsdatum :

    1992


    Format / Umfang :

    12 pages


    Medientyp :

    Report


    Format :

    Keine Angabe


    Sprache :

    Englisch




    Appraisal of digital terrain elevation data for low-altitude flight

    Zelenka, Richard E. / Swenson, Harry N. | NTRS | 1992


    Appraisal of digital terrain elevation data for low-altitude flight

    Zelenka, Richard E. / Swenson, Harry N. | NTRS | 1992


    Digital Terrain Elevation Mapping System

    Malliot, H. A. / IEEE; Aerospace and Electronics Systems Society | British Library Conference Proceedings | 1996