Smap downscaling

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August undefined, 2024

WebOct 1, 2024 · The results show that the four algorithms downscaled SM are capable of capturing spatial distribution features of the original SMAP SM. The downscaled regions with favorable accuracy are mostly... WebThe SMAP mission was designed to downscale 36 km 108 radiometer observations using its own on-board L-band radar. The active/passive concept was 109 the main SMAP downscaling approach until the failure of the SMAP radar. Subsequently, 110 Das et al. (2016) proposed an alternative radar downscaling approach using the Sentinel C-

SMAP - National Snow and Ice Data Center

http://ch.whu.edu.cn/en/article/doi/10.13203/j.whugig20240278 fayette county property taxes wv

Spatial Downscaling and Gap-Filling of SMAP Soil …

WebSoil moisture (SM) downscaling has been extensively investigated in recent years to improve coarse resolution of SM products. However, available methods for dow Downscaling … WebComprehensive analysis of alternative downscaled soil moisture products WebThe resulting downscaled SMAP estimates better characterize soil moisture spatial 17 and temporal variability and have better overall validation metrics than the original SMAP soil … friendship day haiku

Remote Sensing Free Full-Text Enhancing Spatial Resolution of SMAP …

Downscaling SMAP Radiometer Soil Moisture Over the …

WebDec 19, 2024 · In addition developing a neural network retrieval, the SMAP study equally aims at investigating the potential of neural networks as a downscaling tool. Since they are able to model non-linear relationships, it is considered that a neural network-based downscaling algorithm could perform better than the linear SMAP downscaling … WebJul 27, 2024 · SMAP (Soil Moisture Active/Passive) and SMOS (Soil Moisture Ocean Salinity) provide soil moisture observations that can be used for studying the global hydrological cycle, agriculture, ecology, and land atmosphere interactions. SMAP provides soil moisture at two grid scales; 36 km (which is close to its native radiometer spatial resolution) and … fayette county property taxesWebMay 1, 2024 · Thus, an appropriate replacement sensor and new algorithms are urgently needed to compensate for the lost radar and estimate soil moisture at high-resolution. … The normalized difference vegetation index (NDVI) has been widely used for remote … Soil moisture generally refers to the amount of water stored in the unsaturated soil … Classification tree analysis (CTA) provides an effective suite of algorithms for … Test simulations were performed to determine a suitable ensemble size. For … The effects of below-average precipitation in 2001–2003 on the average growing … friendship day in finland

"Web, A spatial downscaling approach for the SMAP passive surface soil moisture product using random forest regression, J. Hydrol. 563 (2024) 1009 – 1024. Google Scholar " - Smap downscaling

Smap downscaling

Remote Sensing Free Full-Text An Approach for Downscaling SMAP Soil …

WebFor instance, Zhao et al. (2024) and Im et al. (2016) used the random forest downscaling method and various MODIS surface variables and band information to downscale the coarse resolution microwave products SMAP and AMSR-E to 1 km [30,31]. WebThe GBDT algorithm was used for SM downscaling over the Tibetan Plateau and effectively improved the resolution of the SMAP SM from 36 to 1 km. High-resolution SM can preserve the accuracy of the original SMAP and express detailed spatial SM variability simultaneously .

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WebThe SMAP Validation Experiment 2015 (SMAPVEX15) was an aircraft-based campaign focusing on validating the downscaling algorithm process. The campaign took place in August 2015 in Arizona. The SMAP Validation Experiment 2016 (SMAPVEX16) took place from May to August 2016 in Manitoba, Canada. WebJan 31, 2024 · Spatial Downscaling and Gap-Filling of SMAP Soil Moisture to High Resolution Using MODIS Surface Variables and Machine Learning Approaches over …

WebFeb 8, 2024 · The global scale daily 1-km SMAP SM data are produced by the visible/infrared downscaling algorithm. The downscaling model performs better in middle/low-latitude … WebJan 31, 2024 · Overall, downscaling SMAP SM by using ML techniques and produce spatial–temporal gap-filled SMAP SM at a high resolution (1 km) rather than a coarse …

WebJun 1, 2024 · This study presented a framework based on the WDL algorithm to downscale the spatial resolution of the SMAP SM product from its original 36 km to a spatial resolution of 1 km using high-resolution MODIS surface reflectance, LST, topographic attributes, soil properties, climate, and land cover type information as auxiliary datasets. WebJun 1, 2024 · A new SM downscaling framework based on the Wide & Deep Learning method is proposed to improve the spatial resolution of SMAP SM. • The proposed …

WebJan 31, 2024 · This study focused on achieving the following purposes: (1) to downscale coarse resolution (36 km) SMAP SM at fine resolution (1 km), using RF and ANN models; (2) to evaluate downscaled SM quality of these ML techniques, comparing with ground truth SM observations at different scales over the SMN-SDR Basin; (3) to analyze the influence of …

WebAug 1, 2024 · Three recently developed downscaling algorithms are evaluated and compared: a simple regression algorithm based on 9-km thermal inertial data, a data mining approach called regression tree based... fayette county property records searchWebDownscaling SMAP soil moisture estimation with gradient boosting decision tree regression over the Tibetan Plateau. 2024. ... Assessment of the SMAP-Derived Soil Water Deficit Index (SWDI-SMAP) as an Agricultural Drought Index in China. 2024. fayette county property tax search kyWebDec 15, 2024 · The new version of baseline SMAP downscaling algorithm is utilized for this purpose. • The downscaled product is evaluated using the passive Australian L-band observations. • The impact of using C-band backscatter in place of L-band in downscaling is investigated. Keywords Brightness temperature Backscatter SMAP Sentinel-1A SMAPEx … friendship day images messagesWeb14 0-10 cm soil layer at SMAP overpass times were extracted for building the downscaling model. 15 These variables are computed from the National Oceanic and Atmospheric Administration Noah 16 model, which is the land component of the National Centers for Environmental Prediction meso- friendship day informationWebOct 6, 2024 · This study compares the performances of four regression tree-based ML algorithms in SMAP SM downscaling over southwest France with various land cover types. Every algorithm generates a 1 km grid resolution downscaled SM product from 9 and 36 km scale, respectively. The validation is initially conducted through comparison to the original … fayette county property taxes kyWebHere we present results of SMAP soil moisture product downscaling using MODIS data over the SMAPVEX15 domain and validation with the PALS 1-km soil moisture measurements. … fayette county property tax paymentsWebThe downscaling of the SMAP soil moisture generally improved the representation of spatial heterogeneity of soil moisture and this heterogeneity is heavily dependent on the complex interaction of intertwined geophysical and atmospheric factors such as soil properties, topography, vegetation and meteorological forcing (Crow et al., 2012 ... friendship day in india 2021