A consortium of investigators from several universities and Government agencies have conducted a series of aircraft topographic surveys over the Long Valley caldera, California. The region has a geologic history of extensive volcanism, and its central dome has recently been undergoing resurgent uplift episodes of up to 4 cm per year, a deformation rate that is still continuing. These surveys were conducted from the NASA WFF T39 jet aircraft, outfitted with a nadir-profiling altimetric laser (ATLAS), a GPS guidance system for in-flight precision navigation, two P-code GPS receivers, a Litton LTN92 inertial unit for attitude determination, and both video and still-frame aerial cameras. In addition, two base-station GPS receivers were deployed for post-flight differential navigation, complementing the permanent GPS station operated on the resurgent dome by JPL, and a kinematic automobile survey of roads crossing the area was conducted, thereby complementing the JPL kinematic GPS surveys of some of the same roads. Precision flying yielded multiple profiles along nearly identical paths, including crossing profiles over selected locations within the caidera and calibration flights over Mono Lake, and Lake Crowley. Data from the most recent survey in 1995 are at this time still being reduced, but the standard error of the mean is very low (< 3 mm), due to the high number of crossover points. We thus intend to evaluate the technique for measuring systematic changes in the dome height over time.


    Zugriff

    Zugriff über TIB

    Verfügbarkeit in meiner Bibliothek prüfen


    Exportieren, teilen und zitieren



    Titel :

    Airborne Laser Altimetric Monitoring of the Rapid Evolution of Topography in the Long Valley, CA, Caldera


    Beteiligte:
    Rundle, John (Autor:in)

    Erscheinungsdatum :

    1998-01-01


    Medientyp :

    Report


    Format :

    Keine Angabe


    Sprache :

    Englisch






    Elementary algorithms for determining the ocean dynamic topography from altimetric and gravity data

    Bingham, R. / Haines, K. / Hughes, C. | British Library Conference Proceedings | 2007


    Scanning altimetric lidar (SALLI): an efficient planetary altimetric mapping instrument [5798-11]

    Gillett, R. / Cheng, A. / Bussey, B. et al. | British Library Conference Proceedings | 2005


    Inflation of Long Valley Caldera from One Year of Continuous GPS Observations

    Webb, F. / Bursik, M. / Dixon, T. et al. | NTRS | 1994