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Titolo:
Volcano monitoring using the Global Positioning System: Filtering strategies
Autore:
Larson, KM; Cervelli, P; Lisowski, M; Miklius, A; Segall, P; Owen, S;
Indirizzi:
Univ Colorado, Dept Aerosp Engn Sci, Boulder, CO 80309 USA Univ Colorado Boulder CO USA 80309 Aerosp Engn Sci, Boulder, CO 80309 USA Stanford Univ, Dept Geophys, Stanford, CA 94305 USA Stanford Univ Stanford CA USA 94305 Dept Geophys, Stanford, CA 94305 USA Cascades Volcano Observ, US Geol Survey, Vancouver, WA 98661 USA Cascades Volcano Observ Vancouver WA USA 98661 y, Vancouver, WA 98661 USA Hawaiian Volcano Observ, US Geol Survey, Hawaii Natl Pk, HI 96718 USA Hawaiian Volcano Observ Hawaii Natl Pk HI USA 96718 Natl Pk, HI 96718 USA Univ So Calif, Dept Earth Sci, Los Angeles, CA 90089 USA Univ So Calif Los Angeles CA USA 90089 rth Sci, Los Angeles, CA 90089 USA
Titolo Testata:
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
fascicolo: B9, volume: 106, anno: 2001,
pagine: 19453 - 19464
SICI:
0148-0227(20010910)106:B9<19453:VMUTGP>2.0.ZU;2-A
Fonte:
ISI
Lingua:
ENG
Soggetto:
PHASE AMBIGUITY RESOLUTION; KILAUEA-VOLCANO; CRUSTAL DEFORMATION; SURFACE DEFORMATION; RAPID DEFORMATION; SOUTH FLANK; GPS; MOTION; HAWAII; CALIFORNIA;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
34
Recensione:
Indirizzi per estratti:
Indirizzo: Larson, KM Univ Colorado, Dept Aerosp Engn Sci, Campus Box 429, Boulder, CO 80309 USA Univ Colorado Campus Box 429 Boulder CO USA 80309 CO 80309 USA
Citazione:
K.M. Larson et al., "Volcano monitoring using the Global Positioning System: Filtering strategies", J GEO R-SOL, 106(B9), 2001, pp. 19453-19464

Abstract

Permanent Global Positioning System (GPS) networks are routinely used for producing improved orbits and monitoring secular tectonic deformation. For these applications, data are transferred to an analysis center each day androutinely processed in 24-hour segments. To use GPS for monitoring volcanic events, which may last only a few hours, real-time or near realtime data processing and subdaily position estimates are valuable. Strategies have been researched for obtaining station coordinates every 15 min using a Kalmanfilter; these strategies have been tested on data collected by a GPS network on Kilauea Volcano. Data from this network are tracked continuously, recorded every 30 s, and telemetered hourly to the Hawaiian Volcano Observatory. A white noise model is heavily impacted by data outages and poor satellite geometry, but a properly constrained random walk model fits the data well. Using a borehole tiltmeter at Kilauea's summit as ground-truth, solutions using different random walk constraints were compared. This study indicates that signals on the order of 5 mm/h are resolvable using a random walk standard deviation of 0.45 cm/rooth. Values lower than this suppress small signals, and values greater than this have significantly higher noise at periods of 1-6 hours.

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Documento generato il 19/01/20 alle ore 20:21:26