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Integration of multiple drought indices using a triple collocation approach
Stochastic Environmental Research and Risk Assessment, 2021Three drought indices (the Standardized Precipitation Index [SPI], Evaporative Stress Index [ESI], and Soil Moisture Anomaly Index [SMAI]) were integrated using triple collocation (TC) to produce the merged drought index (MDI). The new index was then compared with the Gravity recovery and climate experiment (GRACE)–Drought severity index (DSI), a ...
Jongjin Baik +3 more
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Nonparametric triple collocation
Water Resources Research, 2017AbstractTriple collocation has found widespread application in the hydrological sciences because it provides information about the errors in our measurements without requiring that we have any direct access to the true value of the variable being measured.
Grey S. Nearing +7 more
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Estimating SMOS error structure using triple collocation
2011 IEEE International Geoscience and Remote Sensing Symposium, 2011Soil moisture is one of the most important variables regarding climate evolution. It is an ECV (Essential Climate Variable) and there are several data sets of soil moisture derived from satellite data or models. Now time series of soil moisture are available for more than 30 years and it has become important to estimate the error associated to each ...
D.J. Leroux +3 more
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Precipitation Merging Based on the Triple Collocation Method Across Mainland China
IEEE Transactions on Geoscience and Remote Sensing, 2021Triple collocation (TC) is a novel method for quantifying the uncertainties of three data sets with mutually independent errors and has been widely used over different geographical fields. Researches in recent years report that TC shows potential in merging multiple data sets from different sources, while the TC-based merging method has not been used ...
Feng Lyu +6 more
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Triple Collocation-Based Merging of Satellite Soil Moisture Retrievals
IEEE Transactions on Geoscience and Remote Sensing, 2017We propose a method for merging soil moisture retrievals from spaceborne active and passive microwave instruments based on weighted averaging taking into account the error characteristics of the individual data sets. The merging scheme is parameterized using error variance estimates obtained from using triple collocation analysis (TCA).
Alexander Gruber +3 more
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Solution by triple collocation for periodic operation of heat regenerators
Computers & Chemical Engineering, 1984Abstract The problem of periodic, countercurrent operation of packed-bed heat regenerators is considered and solved using triple collocation. This novel method uses collocation in two space variables: along the bed length and along the radius of the solid particles, and collocation in time.
P.A. Ramachandran, M.P. Duduković
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A Binned Triple Collocation for Estimating Regime-Dependent Uncertainties of Precipitation
IEEE Geoscience and Remote Sensing Letters, 2022Triple collocation (TC)-based methods have become popular to estimate the uncertainty of many geophysical variables retrieved from satellite observations. The true advantage of these methods is that no ground-based truth is required and they can thus be applied on a global scale.
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Calibrating wave resource assessments through application of the triple collocation technique
Renewable Energy, 2017Abstract Numerical wave models are often used to hindcast wave conditions and predict the theoretical energy production from wave energy conversion (WEC) devices. It is widely acknowledged that numerical model suffer from bias's and uncertainties which ultimately affect the final predictions of WEC power.
Bryson Robertson +3 more
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Validation of the SMAP freeze/thaw product using categorical triple collocation
Remote Sensing of Environment, 2018Abstract The landscape freeze/thaw (FT) state plays an important role in local, regional and global weather and climate, but is difficult to monitor. The Soil Moisture Active Passive (SMAP) satellite mission provides hemispheric estimates of landscape FT state at a spatial resolution of approximately 36 2 km 2 .
Haobo Lyu +16 more
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