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Determining Regional-Scale Groundwater Recharge with GRACE and GLDAS
2019
Remote Sensing
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Here, we estimate GR using Gravity Recovery and Climate Experiment (GRACE) and Global Land Data Assimilation System (GLDAS) data. ...
The regional-scale GR rate is calculated based on the groundwater storage fluctuation, which is, in turn, calculated from the difference between GRACE and root zone soil water storage from GLDAS data. ...
GRACE-measurable storage increases. ...
doi:10.3390/rs11020154
fatcat:4wki6ivtlvdmzovhkvufcr6gbe
Variations in China's terrestrial water storage over the past decade using GRACE data
2015
Geodesy and Geodynamics
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All GRACE monthly gravity field data were extended to the 60th degree/order. ...
Furthermore, on the basis of the monthly GRACE gravity field, Leblanc [8, 9] . ...
doi:10.1016/j.geog.2015.03.004
fatcat:7kxqqymdanamhatx2evkpj7pqq
GRACETOOLS—GRACE Gravity Field Recovery Tools
2018
Geosciences
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Our aim is to initiate an open source GRACE data analysis platform, where the existing algorithms and codes for working with GRACE data are shared and improved. ...
At the end, we demonstrate how GRACETOOLS works with simulated GRACE type observations. ...
Abbreviations The following abbreviations are used in this manuscript:
ASD Amplitude Spectral Density GRACE Gravity Recovery and Climate Experiment GRACETOOLS GRACE gravity field recovery tools GNV1B ...
doi:10.3390/geosciences8090350
fatcat:5zvsaixy5ngutosoly3vwnlzqq
Effectiveness of empirical orthogonal function used in decorrelation of GRACE time-variable gravity field
2015
Geodesy and Geodynamics
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Gravity recovery and climate experiment (GRACE) gravity field Decorrelation Terrestrial water storage Global Land Data Assimilation System (GLDAS) a b s t r a c t Empirical orthogonal function (EOF) was ...
used to process the spherical harmonic coefficient (SHC) of 115 Gravity Recovery and Climate Experiment (GRACE) RL05 monthly gravity field models from March 2003 to February 2013 released by CSR (Center ...
Data and realization of EOF
GRACE data Along with the prolonged mission time of GRACE, the gravity field models released by CSR are under continuous updating and thus the results become more reliable ...
doi:10.1016/j.geog.2015.05.003
fatcat:bu2zcmo3z5fn7hm6wjx2frn62e
Characterizing the Seasonal Crustal Motion in Tianshan Area Using GPS, GRACE and Surface Loading Models
2017
Remote Sensing
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We attribute this discrepancy to groundwater variations, which are not resolvable by GRACE and SLMs for small-scale regions. and Climate Experiment (GRACE) and surface loading models (SLMs) [7] [8] [9] ...
The crustal vertical deformation obtained by GRACE can be used to exclude the non-tectonic impact caused by land water storage in the GPS results. ...
GRACE. ...
doi:10.3390/rs9121303
fatcat:zy57ivdesrf5xkwiygbukmseu4
Evaluation of GRACE/GRACE Follow-On Time-Variable Gravity Field Models for Earthquake Detection above Mw8.0s in Spectral Domain
2021
Remote Sensing
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This study compares the Gravity Recovery And Climate Experiment (GRACE)/GRACE Follow-On (GFO) errors with the coseismic gravity variations generated by earthquakes above Mw8.0s that occurred during April ...
The results show that the precision of GFO monthly models is approximately 38% higher than that of the GRACE monthly model and all the detected earthquakes have signal-to-noise ratio (SNR) larger than ...
Acknowledgments: We would like to thank CSR for providing the GRACE data. ...
doi:10.3390/rs13163075
fatcat:crlh6cvdljhxpk7cbiiwgiqgou
Graceful Degradation in TSS-BQS Systems
2012
Chinese Journal of Computers
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Dynamical Synapses Enhance Neural Information Processing: Gracefulness, Accuracy, and Mobility
2012
Neural Computation
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Experimental data have revealed that neuronal connection efficacy exhibits two forms of short-term plasticity, namely, short-term depression (STD) and short-term facilitation (STF). They have time constants residing between fast neural signaling and rapid learning, and may serve as substrates for neural systems manipulating temporal information on relevant time scales. The present study investigates the impact of STD and STF on the dynamics of continuous attractor neural networks (CANNs) and
doi:10.1162/neco_a_00269
pmid:22295986
fatcat:juupicupbbexdkh34hlpi6fj2e
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... ir potential roles in neural information processing. We find that STD endows the network with slow-decaying plateau behaviors-the network that is initially being stimulated to an active state decays to a silent state very slowly on the time scale of STD rather than on the time scale of neural signaling. This provides a mechanism for neural systems to hold sensory memory easily and shut off persistent activities gracefully. With STF, we find that the network can hold a memory trace of external inputs in the facilitated neuronal interactions, which provides a way to stabilize the network response to noisy inputs, leading to improved accuracy in population decoding. Furthermore, we find that STD increases the mobility of the network states. The increased mobility enhances the tracking performance of the network in response to time-varying stimuli, leading to anticipative neural responses. In general, we find that STD and STP tend to have opposite effects on network dynamics and complementary computational advantages, suggesting that the brain may employ a strategy of weighting them differentially depending on the computational purpose.
Construction of Earth's gravitational field model from CHAMP, GRACE and GOCE data
2015
Geodesy and Geodynamics
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and CHAMP þ GRACE þ GOCE are derived. ...
A syncretic model constructed from CHAMP, GRACE and GOCE data, which is expressed by champ þ grace þ goce, is obtained based on spectral combination method. ...
2 À s 2 n Á GRACE þ À s 2 n Á GRACE À s 2 n Á GOCE þ À s 2 n Á GRACE ! ...
doi:10.1016/j.geog.2015.06.001
fatcat:32d7f27435bfhb5gslcxcwgily
Gravity Variation in Siberia: GRACE Observation and Possible Causes
2011
Terrestrial, Atmospheric and Oceanic Sciences
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We report the finding, from the GRACE observation, of an increasing trend in the gravity anomaly in Siberia at the rate of up to 0.5 μgal yr -1 during 2003/1 -2009/12, in the backdrop of a negative anomaly ...
Wu, and D. Garcia for inspiring discussions, and S. Tatavian and D. San'kov for providing Siberia geodetic measurements. ...
The standard GRACE data are released in the form of spherical harmonic coefficients typically up to degree n = 120 at monthly intervals (Tapley et al. 2004 ; see http://podaac.jpl.nasa.gov/ grace/documentation.html ...
doi:10.3319/tao.2010.07.26.03(tibxs)
fatcat:ekfrwc5hrjgirnqrrsnjicegoe
GRACE Data-based High Accuracy Global Static Earth's Gravity Field Model
2016
Acta Geodaetica et Cartographica Sinica
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The results demonstrate that the Tongji-Dyn01s has the same accuracy level with those of the latest GRACE-only models, while the Tongji-Dyn01k model is closer to the EIGEN6C2 than the other GRACE-only ...
To recover the highly accurate static earth's gravity field by using GRACE satellite data is one of the hot topics in geodesy. ...
Wu h a n : Wu h a nUn i v e r s i t y
r a v i t yF i e l dR e c o v e r yf r om CHAMP O r b i t a n d A c c e l e r om e t e r D a t a [ D ] ．Z h e n g z h o u : T h e P LA I n f o r m a t i o nE n g ...
doi:10.11947/j.agcs.2016.20150422
doaj:236fc73ab1f44c799b73de21337c5fe3
fatcat:gcu5iwazand2naozt32jq6p54a
Correction
2006
Journal of Cell Biology
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Temporal Evolution of Regional Drought Detected from GRACE TWSA and CCI SM in Yunnan Province, China
2017
Remote Sensing
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In this study, the direction, magnitude, start time, and duration of droughts were investigated, based on Total Water Storage Anomalies (TWSA) of Gravity Recovery and Climate Experiment (GRACE), Climate ...
GRACE observations and CCI SM can be used as important indicators of the spatial distribution of the drought process and its impact on the environment and local communities, which will improve the management ...
Deriving month-to-month gravity field variations from GRACE observations requires a complex inversion of the changing observations between the two formation-flying GRACE spacecrafts, combined with precise ...
doi:10.3390/rs9111124
fatcat:mthrka7zlffxznjwtz7zdagj3e
Application of Accelerometer Data in Precise Orbit Determination of GRACE -A and -B
2008
Chinese Journal of Astronomy and Astrophysics
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We investigate how well the GRACE satellite orbits can be determined using the onboard GPS data combined with the accelerometer data. ...
The relative accuracy between the two GRACE satellites is validated by the KBR data to be on a level of 1.29 cm for the SD, and 1.03 cm for the ZD solution. ...
Acknowledgements The authors extend special thanks to the information system and data center (ISDC) of GeoForschungesZentrum (GFZ), for providing the GPS satellites orbit and GRACE Level 1B data. ...
doi:10.1088/1009-9271/8/5/11
fatcat:houour5sf5fnlgupo3hzqtwcta
Phase Error Modeling and Its Impact on Precise Orbit Determination of GRACE Satellites
2012
Mathematical Problems in Engineering
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are 0.0068 m and 0.0075 m for GRACE A and GRACE B, respectively. ...
The three-dimensional (3D) orbit improvements derived from phase error model correction are 0.0153 m for GRACE A and 0.0131 m for GRACE B, and the 3D influences arisen from random part of phase error model ...
Acknowledgments The authors are grateful to GeoForschungsZentrum GFZ for providing GPS observation data, attitude data, KBR data, and precise science orbit data of GRACE mission. ...
doi:10.1155/2012/710586
fatcat:cfqa6i6vyje7zbeql5iblg2wzu
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