Search Results - "Heflin, Michael"

GipsyX/RTGx, a new tool set for space geodetic operations and research by Bertiger, Willy, Bar-Sever, Yoaz, Dorsey, Angie, Haines, Bruce, Harvey, Nate, Hemberger, Dan, Heflin, Michael, Lu, Wenwen, Miller, Mark, Moore, Angelyn W., Murphy, Dave, Ries, Paul, Romans, Larry, Sibois, Aurore, Sibthorpe, Ant, Szilagyi, Bela, Vallisneri, Michele, Willis, Pascal

“…GipsyX/RTGx is the Jet Propulsion Laboratory’s (JPL) next generation software package for positioning, navigation, timing, and Earth science using measurements…”
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Horizontal motion in elastic response to seasonal loading of rain water in the Amazon Basin and monsoon water in Southeast Asia observed by GPS and inferred from GRACE by Fu, Yuning, Argus, Donald F., Freymueller, Jeffrey T., Heflin, Michael B.

“…We find seasonal horizontal crustal motions observed by GPS positioning in elastic response to heavy rainfall in the Amazon Basin and to monsoons in Southeast…”
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The angular velocities of the plates and the velocity of Earth's centre from space geodesy by Argus, Donald F., Gordon, Richard G., Heflin, Michael B., Ma, Chopo, Eanes, Richard J., Willis, Pascal, Peltier, W. Richard, Owen, Susan E.

“…Using space geodetic observations from four techniques (GPS, VLBI, SLR and DORIS), we simultaneously estimate the angular velocities of 11 major plates and the…”
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A global assessment of accelerations in surface mass transport by Wu, Xiaoping, Heflin, Michael B.

“…Water mass transport in the Earth's dynamic surface layer of atmosphere, cryosphere, and hydrosphere driven by various global change processes has complex…”
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Simultaneous estimation of global present-day water transport and glacial isostatic adjustment by Wu, Xiaoping, Dong, Danan, Vermeersen, Bert L. A, Owen, Susan E, Gross, Richard S, Ivins, Erik R, Schotman, Hugo, Moore, Angelyn W, Heflin, Michael B

“…Global water transport between oceans and continents during the transition from glacial to interglacial times has been enormous. The viscoelastic solid Earth…”
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Automated Estimation and Tools to Extract Positions, Velocities, Breaks, and Seasonal Terms From Daily GNSS Measurements: Illuminating Nonlinear Salton Trough Deformation by Heflin, Michael, Donnellan, Andrea, Parker, Jay, Lyzenga, Gregory, Moore, Angelyn, Ludwig, Lisa Grant, Rundle, John, Wang, Jun, Pierce, Marlon

“…This paper describes the methods used to estimate positions, velocities, breaks, and seasonal terms from daily Global Navigation Satellite System (GNSS)…”
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Seasonal and interannual global surface mass variations from multisatellite geodetic data by Wu, Xiaoping, Heflin, Michael B., Ivins, Erik R., Fukumori, Ichiro

“…Monthly global surface mass distribution changes are estimated in the spherical harmonic domain with a complete spectrum up to degree and order 50. The…”
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Is the Jason-2 DORIS oscillator also affected by the South Atlantic Anomaly? by Willis, Pascal, Heflin, Michael B., Haines, Bruce J., Bar-Sever, Yoaz E., Bertiger, Willy I., Mandea, Mioara

“…We analyzed time series of daily DORIS and GPS station coordinate estimates derived from Precise Point Positioning (PPP). The DORIS coordinates were estimated…”
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Optimizing Earthquake Nowcasting With Machine Learning: The Role of Strain Hardening in the Earthquake Cycle by Rundle, John B., Yazbeck, Joe, Donnellan, Andrea, Fox, Geoffrey, Ludwig, Lisa Grant, Heflin, Michael, Crutchfield, James

“…Nowcasting is a term originating from economics, finance, and meteorology. It refers to the process of determining the uncertain state of the economy, markets…”
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JTRF2014, the JPL Kalman filter and smoother realization of the International Terrestrial Reference System by Abbondanza, Claudio, Chin, Toshio M., Gross, Richard S., Heflin, Michael B., Parker, Jay W., Soja, Benedikt S., van Dam, Tonie, Wu, Xiaoping

“…We present and discuss JTRF2014, the Terrestrial Reference Frame (TRF) the Jet Propulsion Laboratory constructed by combining space‐geodetic inputs from very…”
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Improved Global Nonlinear Surface Mass Variation Estimates From Geodetic Displacements and Reconciliation With GRACE Data by Wu, Xiaoping, Haines, Bruce J., Heflin, Michael B., Landerer, Felix W.

“…Spatiotemporal coverage gaps and the nature of distant signature sources in Global Navigation Satellite System (GNSS) and The Gravity Recovery and Climate…”
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On the long-term stability of terrestrial reference frame solutions based on Kalman filtering by Soja, Benedikt, Gross, Richard S., Abbondanza, Claudio, Chin, Toshio M., Heflin, Michael B., Parker, Jay W., Wu, Xiaoping, Nilsson, Tobias, Glaser, Susanne, Balidakis, Kyriakos, Heinkelmann, Robert, Schuh, Harald

“…The Global Geodetic Observing System requirement for the long-term stability of the International Terrestrial Reference Frame is 0.1 mm/year, motivated by…”
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Interseismic strain accumulation and anthropogenic motion in metropolitan Los Angeles by Argus, Donald F., Heflin, Michael B., Peltzer, Gilles, Crampé, Fréderic, Webb, Frank H.

“…We use global positioning system (GPS) geodesy and synthetic aperture radar (SAR) interferometry to distinguish between interseismic strain accumulation and…”
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Clustering Analysis Methods for GNSS Observations: A Data‐Driven Approach to Identifying California's Major Faults by Granat, Robert, Donnellan, Andrea, Heflin, Michael, Lyzenga, Gregory, Glasscoe, Margaret, Parker, Jay, Pierce, Marlon, Wang, Jun, Rundle, John, Ludwig, Lisa G.

“…We present a data‐driven approach to clustering or grouping Global Navigation Satellite System (GNSS) stations according to observed velocities, displacements…”
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KALREF-A Kalman filter and time series approach to the International Terrestrial Reference Frame realization by Wu, Xiaoping, Abbondanza, Claudio, Altamimi, Zuheir, Chin, T. Mike, Collilieux, Xavier, Gross, Richard S., Heflin, Michael B., Jiang, Yan, Parker, Jay W.

“…The current International Terrestrial Reference Frame is based on a piecewise linear site motion model and realized by reference epoch coordinates and…”
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External validation of the GRACE GGM01C gravity field using GPS and DORIS positioning results by Willis, Pascal, Heflin, Michael B.

“…We have used the new gravity field model GGM01C derived from GRACE data to reanalyze DORIS data from 1993.0 to 2003.2 using the Gipsy/Oasis software and a…”
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Site distribution and aliasing effects in the inversion for load coefficients and geocenter motion from GPS data by Wu, Xiaoping, Argus, Donald F., Heflin, Michael B., Ivins, Erik R., Webb, Frank H.

“…Precise GPS measurements of elastic relative site displacements due to surface mass loading offer important constraints on global surface mass transport. We…”
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Large-scale global surface mass variations inferred from GPS measurements of load-induced deformation by Wu, Xiaoping, Heflin, Michael B., Ivins, Erik R., Argus, Donald F., Webb, Frank H.

“…Detrended crustal deformation measurements from a global network of up to 200 continuous Global Positioning System (GPS) tracking sites are inverted for low…”
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Quasi-continuous global positioning system measurements of glacial isostatic deformation in the Northern Transantarctic Mountains by Raymond, Carol A, Ivins, Erik R, Heflin, Michael B, James, Thomas S

“…Global positioning system (GPS) measurements have been collected quasi-continuously between November 1996 and January 2001 at two autonomous GPS stations in…”
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Continuous monitoring of surface deformation at Long Valley Caldera, California, with GPS by Dixon, Timothy H., Mao, Ailin, Bursik, Marcus, Heflin, Michael, Langbein, John, Stein, Ross, Webb, Frank

“…Continuous Global Positioning System (GPS) measurements at Long Valley Caldera, an active volcanic region in east central California, have been made on the…”
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