Results 21 to 30 of about 8,433 (234)
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 +1 more source
Error characterisation of global active and passive microwave soil moisture datasets [PDF]
Hydrology and Earth System Sciences, 2010 Understanding the error structures of remotely sensed soil moisture observations is essential for correctly interpreting observed variations and trends in the data or assimilating them in hydrological or numerical weather prediction models. Nevertheless,
W. A. Dorigo +6 more
doaj +1 more source
Estimates of Mode-S EHS aircraft-derived wind observation errors using triple collocation [PDF]
Atmospheric Measurement Techniques, 2016 Information on the accuracy of meteorological observation is essential to assess the applicability of the measurements. In general, accuracy information is difficult to obtain in operational situations, since the truth is unknown. One method to determine
S. de Haan
doaj +1 more source
Remote Sensing, 2014 Nowadays, spaceborne Synthetic Aperture Radar (SAR) has become a powerful tool for providing significant wave height (SWH). Traditionally, validation of SAR derived SWH has been carried out against buoy measurements or model outputs, which only yield an ...
He Wang, Jianhua Zhu, Jingsong Yang
doaj +1 more source
Inconsistencies of interannual variability and trends in long-term satellite leaf area index products [PDF]
, 2017 Understanding the long-term performance of global satellite leaf area index (LAI) products is important for global change research. However, few effort has been devoted to evaluating the long-term time-series consistencies of LAI products.
Claverie, Martin +5 more
core +1 more source
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 +6 more
doaj +1 more source
Extended triple collocation: estimating errors and correlation coefficients with respect to an unknown target [PDF]
, 2014 Calibration 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,
Entekhabi, Dara +5 more
core +2 more sources
Discrete mechanics and optimal control: An analysis [PDF]
, 2009 The optimal control of a mechanical system is of crucial importance in many application areas. Typical examples are the determination of a time-minimal path in vehicle dynamics, a minimal energy trajectory in space mission design, or optimal motion ...
Junge, Oliver +2 more
core +3 more sources
Frontiers in Climate, 2021 The majority of people in East Africa rely on the agro-pastoral system for their livelihood, which is highly vulnerable to droughts and flooding. Agro-pastoral droughts are endemic to the region and are considered the main natural hazard that contributes
Shahriar Pervez +7 more
doaj +1 more source
Merging Microwave, Optical, and Reanalysis Data for 1 Km Daily Soil Moisture by Triple Collocation
Remote Sensing, 2022 High-spatiotemporal resolution soil moisture (SM) plays an essential role in optimized irrigation, agricultural droughts, and hydrometeorological model simulations. However, producing high-spatiotemporal seamless soil moisture products is challenging due
Luyao Zhu +6 more
doaj +1 more source