Results 11 to 20 of about 506,951 (266)

Global-scale Evaluation of SMAP, SMOS and ASCAT Soil Moisture Products using Triple Collocation. [PDF]

Remote Sens Environ, 2018
Global-scale surface soil moisture products are currently available from multiple remote sensing platforms. Footprint-scale assessments of these products are generally restricted to limited number of densely-instrumented validation sites. However, by taking active and passive soil moisture products together with a third independent soil moisture ...
Chen F, Crow WT, Bindlish R, Colliander A, Burgin MS, Asanuma J, Aida K.   +6 more
europepmc   +6 more sources

Extended triple collocation: Estimating errors and correlation coefficients with respect to an unknown target [PDF]

Geophysical Research Letters, 2014
AbstractCalibration and validation of geophysical measurement systems typically require knowledge of the “true” value of the target variable. However, the data considered to represent the “true” values often include their own measurement errors, biasing calibration, and validation results.
McColl, Kaighin Alexander, Vogelzang, Jur, Konings, Alexandra G., Entekhabi, Dara, Piles Guillem, Maria, Stoffelen, Ad   +5 more
core   +10 more sources

Triple collocation-based multi-source evaporation and transpiration merging

Agricultural and Forest Meteorology, 2023
Jongmin Park, J. Baik, Minha Choi
semanticscholar   +4 more sources

Beyond triple collocation: Applications to soil moisture monitoring [PDF]

Journal of Geophysical Research: Atmospheres, 2014
AbstractTriple collocation (TC) is routinely used to resolve approximated linear relationships between different measurements (or representations) of a geophysical variable that are subject to errors. It has been utilized in the context of calibration, validation, bias correction, and error characterization to allow comparisons of diverse data records ...
Su, C-H, Ryu, D, Crow, WT, Western, AW
openaire   +4 more sources

Global Calibration and Error Estimation of Altimeter, Scatterometer, and Radiometer Wind Speed Using Triple Collocation

Remote Sensing, 2020
The accuracy of wind speed measurements is important in many applications. In the present work, error standard deviations of wind speed measured by satellites and National Data Buoy Center (NDBC) buoys were estimated using triple collocation.
Agustinus Ribal, Ian R. Young
doaj   +3 more sources

Proposing a new integration system: Tolerance Merged Collocation comparative to Modified and Scaled Triple Collocation and weighting scheme to integrate four indices

Geomatics, Natural Hazards & Risk
The absence of a global standard for drought assessment has led to inconsistencies in observational methods. This study explores recent advancements in merging techniques to enhance drought monitoring, develop more reliable indices, and introduce a ...
Zanib Badar, Jianyi Lin, Mohammed M. A. Almazah, Ijaz Hussain, Shreefa O. Hilali, A. Y. Al-Rezami, Abdulkareem M. Basheer   +6 more
doaj   +2 more sources

Recent advances in (soil moisture) triple collocation analysis

International Journal of Applied Earth Observation and Geoinformation, 2016
Abstract To date, triple collocation (TC) analysis is one of the most important methods for the global-scale evaluation of remotely sensed soil moisture data sets. In this study we review existing implementations of soil moisture TC analysis as well as investigations of the assumptions underlying the method.
A. Gruber, C.-H. Su, S. Zwieback, W. Crow, W. Dorigo, W. Wagner   +5 more
openaire   +3 more sources

Triple Collocation-Based Uncertainty Analysis and Data Fusion of Multi-Source Evapotranspiration Data Across China

Atmosphere
Accurate estimation of evapotranspiration (ET) is critical for understanding land-atmospheric interactions. Despite the advancement in ET measurement, a single ET estimate still suffers from inherent uncertainties.
Dayang Wang, Shaobo Liu, Dagang Wang
doaj   +2 more sources

Applying triple collocation for verifying wind resource measurements and reanalysis data

Journal of Physics: Conference Series
Dual comparisons or dual collocation, respectively, is a standard approach in wind data analysis, and particularly in the wind energy resource assessment context, for comparing and relating two time series from different sources describing the same ...
J. Gottschall, Angela Moskal
semanticscholar   +2 more sources

A Hybrid Triple Collocation-Deep Learning Approach for Improving Soil Moisture Estimation from Satellite and Model-Based Data

Remote Sensing, 2022
Satellite retrieval and land surface models have become the mainstream methods for monitoring soil moisture (SM) over large regions; however, the uncertainty and coarse spatial resolution of these products limit their applications at the regional and ...
Wenting Ming, Xuan Ji, Mingda Zhang, Yungang Li, Chang Liu, Yinfei Wang, Jiqiu Li   +6 more
doaj   +2 more sources