Results 21 to 30 of about 5,604,864 (173)

Surface soil moisture from combined active and passive microwave observations: Integrating ASCAT and SMAP observations based on machine learning approaches

Remote Sensing of Environment
International audienceThe fusion of active and passive microwave measurements is expected to provide more robust surface soil moisture (SSM) mapping across various environmental conditions compared to the use of a single sensor.
Wang, Shaohua, Wigneron, Jean-Pierre, Fu, Peng, Letu, Husi, Chen, Nengcheng, Li, Xiaojun, Zeng, Jiangyuan, Zhang, Xiang, Cosh, Michael, Ma, Hongliang, Peng, Jian   +10 more
core   +2 more sources

The SMAP Mission Combined Active-Passive Soil Moisture Product at 9 Km and 3 Km Spatial Resolutions

Remote Sensing of Environment, 2018
The NASA Soil Moisture Active Passive (SMAP) mission was launched on January 31st, 2015. The spacecraft was to provide high-resolution (3 km and 9 km) global soil moisture estimates at regular intervals by combining for the first time L-band radiometer ...
Jackson, Thomas J., O'Neill, Peggy E., Cosh, Michael H., Lopez-Baeza, Ernesto, Entekhabi, Dara, Bosch, David D., Njoku, Eni G., Rowlandson, Tracy, Crow, Wade, Caldwell, Todd, Dunbar, R. Scott, Berg, Aaron, Collins, Chandra H., Moghaddam, Mahta, Thibeault, Marc, Chen, Fan, Walker, Jeffrey P., Wu, Xiaoling, Colliander, Andreas, Yueh, Simon, Das, Narendra N., Starks, Patrick J.   +21 more
core   +1 more source

Soil Moisture Retrieval Using SMAP L-Band Radiometer and RISAT-1 C-Band SAR Data in the Paddy Dominated Tropical Region of India

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2021
National Aeronautics and Space Administration's soil moisture active–passive (SMAP) mission potential to produce high-resolution soil moisture suffered adversely due to its L-band synthetic-aperture radar (SAR) failure.
Gurjeet Singh, Narendra Das, Rabindra Panda, Binayak Mohanty, Dara Entekhabi, Bimal Bhattacharya   +5 more
doaj   +1 more source

HIGH-RESOLUTION ENHANCED PRODUCT BASED ON SMAP ACTIVE-PASSIVE APPROACH USING SENTINEL 1A AND 1B SAR DATA [PDF]

The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2018
SMAP project released a new enhanced high-resolution (3km) soil moisture active-passive product. This product is obtained by combining the SMAP radiometer data and the Sentinel-1A and -1B Synthetic Aperture Radar (SAR) data.
N. N. Das, D. Entekhabi, S. Kim, T. Jagdhuber, S. Dunbar, S. Yueh, P. E. O’Neill, A. Colliander, J. Walker, T. J. Jackson   +9 more
doaj   +1 more source

Validation of SMOS, SMAP, and ESA CCI Soil Moisture Over a Humid Region

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2021
With recent advances in satellite microwave soil moisture estimation, there is a demand for up-to-date validation of satellite soil moisture products. This article presents a sparse network validation over a humid region within the Laurentian Great Lakes
Xiaoyong Xu, Steven Frey
doaj   +1 more source

Investigating the Potential of Downscaling Approaches for SMAP Radiometer Soil Moisture in Agroforestry Areas, China

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2022
Accurate high-spatial-resolution soil moisture content (SMC) datasets are crucial for applications, such as erosion modelling, flood forecasting, and agricultural production.
Huizhen Cui, Lingmei Jiang, Menxin Wu, Jian Wang, Fangbo Pan, Wanjin Liao   +5 more
doaj   +1 more source

DOWNSCALING OF SMAP SOIL MOISTURE PRODUCT BY DATA FUSION WITH VIIRS LST/EVI PRODUCT [PDF]

The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2021
Soil moisture is an essential variable of environment and climate change, which affects the energy and water exchange between soil and atmosphere. The estimation of soil moisture is thus very important in geoscience, while at same time also challenging ...
X. Lei, Y. Wang, T. Guo
doaj   +1 more source

Controls on surface soil drying rates observed by SMAP and simulated by the Noah land surface model [PDF]

Hydrology and Earth System Sciences, 2018
Drydown periods that follow precipitation events provide an opportunity to assess controls on soil evaporation on a continental scale. We use SMAP (Soil Moisture Active Passive) observations and Noah simulations from drydown periods to quantify the ...
P. J. Shellito, E. E. Small, B. Livneh
doaj   +1 more source

A reduced latency regional gap-filling method for SMAP using random forest regression

iScience, 2023
Summary: The soil moisture active/passive (SMAP) mission represents a significant advance in measuring soil moisture from satellites. However, its large spatial-temporal data gaps limit the use of its values in near-real-time (NRT) applications ...
Xiaoyi Wang, Haishen Lü, Wade T. Crow, Gerald Corzo, Yonghua Zhu, Jianbin Su, Jingyao Zheng, Qiqi Gou   +7 more
doaj   +1 more source

Downscaling of SMAP Soil Moisture Using Land Surface Temperature and Vegetation Data

Vadose Zone Journal, 2018
Remotely sensed soil moisture retrieved by the Soil Moisture Active and Passive (SMAP) sensor is currently provided at a 9-km grid resolution. Although valuable, some applications in weather, agriculture, ecology, and watershed hydrology require soil ...
Bin Fang, Venkataraman Lakshmi, Rajat Bindlish, Thomas J. Jackson   +3 more
doaj   +1 more source