Results 81 to 90 of about 663,929 (162)

Remote Sensing of Organic Films on the Water Surface Using Dual Co-Polarized Ship-Based X-/C-/S-Band Radar and TerraSAR-X

Remote Sensing, 2018
Microwave radar is a well-established tool for all-weather monitoring of film slicks which appear in radar imagery of the surface of water bodies as areas of reduced backscatter due to suppression of short wind waves.
Stanislav A. Ermakov, Irina A. Sergievskaya, José C.B. da Silva, Ivan A. Kapustin, Olga V. Shomina, Alexander V. Kupaev, Alexander A. Molkov   +6 more
doaj   +1 more source

Characterizing Tidal Marsh Inundation with Synthetic Aperture Radar, Radiometric Modeling, and In Situ Water Level Observations

Remote Sensing
Tidal marshes play a globally critical role in carbon and hydrologic cycles by sequestering carbon dioxide from the atmosphere and exporting dissolved organic carbon to connected estuaries.
Brian T. Lamb, Kyle C. McDonald, Maria A. Tzortziou, Derek S. Tesser   +3 more
doaj   +1 more source

Estimating Stem Water Content From Tower-Based L-Band Tomographic Radar Using a Single-Scattering Model of a Uniform Layer: A First in Situ Experiment

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
Spaceborne synthetic aperture radar missions have the potential to estimate forest vegetation water content (VWC), but understanding the underlying scattering processes and their link to VWC is still limited.
Theresa Leistner, Albert R. Monteith, Jose Gutierrez Lopez, Lars M. H. Ulander   +3 more
doaj   +1 more source

Coordinated optical and radar observations of ionospheric pumping for a frequency pass through the second electron gyroharmonic at HAARP [PDF]

, 2007
On 4 February 2005, the High-frequency Active Auroral Research Program (HAARP) facility was operated in O and X mode while pointing into the magnetic zenith to produce artificial optical emissions in the ionospheric F layer. The pump frequency was set to
Senior, Andrew, Pedersen, T., Kosch, Mike J., Bristow, B., Mishin, E., Watkins, B., Hughes, J., Oyama, S.   +7 more
core   +2 more sources

Soil moisture estimation underneath crop cover using high incidence angle C-band Sentinel-1 SAR data

Kuwait Journal of Science
SAR's return signal sensitivity to dielectric constant and penetration through vegetation makes it ideal for large-scale soil moisture studies. High incidence angle SAR data is especially useful for understanding crop characteristics.
Hari Shanker Srivastava, Thota Sivasankar, Madhuri Dilip Gavali, Parul Patel   +3 more
doaj   +1 more source

Regional Differences in Sentinel-3 Radar Backscatter Over Greenland and its Impact on ice Sheet Altimetry Applications

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
Satellite radar altimetry operating at Ku-band has provided crucial observations of ice sheet elevation change for more than three decades, offering a direct means to assess climate impacts. Surface height is derived from radar waveforms using retracking
Stine Kildegaard Rose, Louise Sandberg Sorensen, Kirk M. Scanlan, Jeremie Aublanc, Filomena Catapano, Alessandro Di Bella, Pierre Femenias, Sebastian B. Simonsen   +7 more
doaj   +1 more source

Glacier melt detection at different sites of Greenland ice sheet using dual-polarized Sentinel-1 images

Geo-spatial Information Science
Synectic Aperture Radar (SAR) backscatter coefficient is sensitive to glacier surface physical characteristic changes, including the states of melting and refreezing, but it is also sensitive to incidence angle variation.
Gang Li, Xiao Chen, Hui Lin, Andrew Hooper, Zhuoqi Chen, Xiao Cheng   +5 more
doaj   +1 more source

Vegetation, topography and snow melt at the Forest-Tundra Ecotone in arctic Europe: a study using synthetic aperture radar [PDF]

, 2003
This research was conducted as part of DART (Dynamic Response of the Forest-Tundra Ecotone to Environmental Change), a four year (1998-2002) European Commission funded international programme of research addressing the potential dynamic response of the ...
Dean, Andrew Mark
core  

A Two-Stream LSTM-Based Backscattering Model at L-Band and S- Band for Dry Soil Surfaces Under Large Roughness Conditions

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
In this article, we report for the first time two radar measurements (Ji Mo 2008 and Min Qin 2009) on natural soil surfaces under large roughness, which were conducted by the China Research Institute of Radiowave Propagation.
Dong Zhu, Peng Zhao, Qiang Zhao, Qing-Liang Li, Yu-Shi Zhang, Li-Xia Yang   +5 more
doaj   +1 more source

Temporal, spatial, spectral and polarisation characteristics of the SAR backscatter from regenerating tropical forests

, 2001
The establishment of an accurate global carbon budget and the consequent ability to understand and predict future environmental change is dependent on knowing the strength of terrestrial sinks and sources of carbon.
Kuplich, Tatiana Mora, Kuplich, T.M.
core   +1 more source