Results 11 to 20 of about 4,899 (168)

Measuring currents, ice drift, and waves from space: the Sea surface KInematics Multiscale monitoring (SKIM) concept [PDF]

Ocean Science, 2018
We propose a satellite mission that uses a near-nadir Ka-band Doppler radar to measure surface currents, ice drift and ocean waves at spatial scales of 40 km and more, with snapshots at least every day for latitudes 75 to 82°, and every few days for ...
F. Ardhuin, Y. Aksenov, A. Benetazzo, L. Bertino, P. Brandt, E. Caubet, B. Chapron, F. Collard, S. Cravatte, J.-M. Delouis, F. Dias, G. Dibarboure, L. Gaultier, J. Johannessen, A. Korosov, G. Manucharyan, D. Menemenlis, M. Menendez, G. Monnier, A. Mouche, F. Nouguier, G. Nurser, P. Rampal, A. Reniers, E. Rodriguez, J. Stopa, C. Tison, C. Ubelmann, E. van Sebille, J. Xie   +29 more
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Measuring ocean total surface current velocity with the KuROS and KaRADOC airborne near-nadir Doppler radars: a multi-scale analysis in preparation for the SKIM mission [PDF]

Ocean Science, 2020
Surface currents are poorly known over most of the world's oceans. Satellite-borne Doppler wave and current scatterometers (DWaCSs) are among the proposed techniques to fill this observation gap.
L. Marié, F. Collard, F. Nouguier, L. Pineau-Guillou, D. Hauser, F. Boy, S. Méric, P. Sutherland, C. Peureux, G. Monnier, B. Chapron, A. Martin, P. Dubois, C. Donlon, T. Casal, F. Ardhuin   +15 more
doaj   +1 more source

Physics-Based Forward Modeling of Ocean Surface Swell Effects on SMAP L1-C NRCS Observations

Sensors, 2022
This paper examines the impact of ocean surface swell waves on near-coastal L-band high-resolution synthetic aperture radar (SAR) data collected using the National Aeronautics and Space Administration’s (NASA) Soil Moisture Active/Passive (SMAP) radar at
Shanka N. Wijesundara, Joel T. Johnson
doaj   +1 more source

Effects of decimetre-scale surface roughness on L-band brightness temperature of sea ice [PDF]

The Cryosphere, 2020
Sea ice thickness is an essential climate variable. Current L-Band sea ice thickness retrieval methods do not account for sea ice surface roughness that is hypothesised to be not relevant to the process.
M. Miernecki, M. Miernecki, L. Kaleschke, L. Kaleschke, N. Maaß, S. Hendricks, S. S. Søbjærg   +6 more
doaj   +1 more source

Improved hydrometeor detection near the Earth's surface by a conically scanning spaceborne W-band radar [PDF]

Atmospheric Measurement Techniques
The Earth's strong radar surface return limits the detection of clouds and precipitation in the lowest part of the atmosphere by nadir-pointing spaceborne radars such as CloudSat and EarthCARE.
M. Coppola, A. Battaglia, A. Battaglia, F. Tridon, P. Kollias, P. Kollias   +5 more
doaj   +1 more source

Analysis of Ku- and Ka-Band Sea Surface Backscattering Characteristics at Low-Incidence Angles Based on the GPM Dual-Frequency Precipitation Radar Measurements

Remote Sensing, 2019
The co-located normalized radar backscatter cross section measurements from the Global Precipitation Measurement (GPM) Ku/Ka-band dual-frequency precipitation radar (DPR) and sea surface wind; wave and temperature observations from the National Data Buoy
Qiushuang Yan, Jie Zhang, Chenqing Fan, Junmin Meng   +3 more
doaj   +1 more source

Airborne observations of arctic-boreal water surface elevations from AirSWOT Ka-Band InSAR and LVIS LiDAR

Environmental Research Letters, 2020
AirSWOT is an experimental airborne Ka-band radar interferometer developed by NASA-JPL as a validation instrument for the forthcoming NASA Surface Water and Ocean Topography (SWOT) satellite mission.
Jessica V Fayne, Laurence C Smith, Lincoln H Pitcher, Ethan D Kyzivat, Sarah W Cooley, Matthew G Cooper, Michael W. Denbina, Albert C. Chen, Curtis W. Chen, Tamlin M. Pavelsky   +9 more
doaj   +1 more source

Liver cancer mortality trends in South Africa: 1999–2015

BMC Cancer, 2018
Background In South Africa (SA), liver cancer (LC) is a public health problem and information is limited. Methods Joinpoint regression analysis was computed for the most recent LC mortality data from Statistics South Africa (StatsSA), by age group, sex ...
Daniel Mak, Mazvita Sengayi, Wenlong C. Chen, Chantal Babb de Villiers, Elvira Singh, Anna Kramvis   +5 more
doaj   +1 more source

Demonstration of Two Portable Scanning LiDAR Systems Flown at Low-Altitude for Investigating Coastal Sea Surface Topography

Remote Sensing, 2011
We demonstrate the efficacy of a commercial portable 2D laser scanner (operating at a wavelength close to 1,000 nm) deployed from a fixed-wing aircraft for measuring the sea surface topography and wave profiles over coastal waters.
Jorg Hacker, Julian Vrbancich, Wolfgang Lieff   +2 more
doaj   +1 more source

Temporal behavior of major crops with SWOT Ka-band SAR observations

GIScience & Remote Sensing
Accurate monitoring of crop development is critical for understanding production drivers and implementing effective agricultural policies. In this study, we propose a novel application of the surface water and ocean topography (SWOT) Ka-band synthetic ...
Henri Bazzi, Nicolas Baghdadi, Cecile Cazals, Saeideh Maleki, Mehrez Zribi, Frédéric Frappart   +5 more
doaj   +1 more source