Results 11 to 20 of about 431,526 (216)

Evolution of the Performances of Radar Altimetry Missions from ERS-2 to Sentinel-3A over the Inner Niger Delta

open access: yesRemote Sensing, 2018
Radar altimetry provides unique information on water stages of inland hydro-systems. In this study, the performance of seven altimetry missions, among the most commonly used in land hydrology (i.e., European Remote-Sensing Satellite-2 (ERS-2 ...
Cassandra Normandin   +8 more
doaj   +2 more sources

Monitoring Water Levels and Discharges Using Radar Altimetry in an Ungauged River Basin: The Case of the Ogooué

open access: yesRemote Sensing, 2018
Radar altimetry is now commonly used for the monitoring of water levels in large river basins. In this study, an altimetry-based network of virtual stations was defined in the quasi ungauged Ogooué river basin, located in Gabon, Central Africa, using ...
Sakaros Bogning   +10 more
doaj   +2 more sources

Impact of Surface Soil Moisture Variations on Radar Altimetry Echoes at Ku and Ka Bands in Semi-Arid Areas

open access: yesRemote Sensing, 2018
Radar altimetry provides information on the topography of the Earth surface. It is commonly used for the monitoring not only sea surface height but also ice sheets topography and inland water levels.
Christophe Fatras   +2 more
exaly   +3 more sources

Enhancing Chashma Barrage water level estimations with sentinel 3 radar altimetry

open access: yesDiscover Water
Satellite Radar altimetry has emerged as a powerful tool for monitoring inland water bodies including rivers, lakes, and coastal regions. However, challenges persist regarding its accuracy, particularly over complex terrains.
Tauqeer Ali   +8 more
doaj   +2 more sources

River Water Level and Water Surface Slope Measurement From Spaceborne Radar and LiDAR Altimetry: Evaluation and Implications for Hydrological Studies in the Ganga River

open access: yesIEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
Satellite altimetry has revolutionized river monitoring, particularly for hydrologists working on river flow monitoring in sparsely or ungauged areas. Despite this, there is a lack of a comprehensive evaluation of radar and LiDAR altimeters with varying ...
Pankaj R. Dhote   +7 more
doaj   +2 more sources

Measuring Height Change Around the Periphery of the Greenland Ice Sheet With Radar Altimetry

open access: yesFrontiers in Earth Science, 2019
Ice loss measurements around the periphery of the Greenland Ice Sheet can provide key information on the response to climate change. Here we use the excellent spatial and temporal coverage provided by the European Space Agency (ESA) CryoSat satellite ...
Ian Joughin   +2 more
exaly   +2 more sources

Monitoring Sea Level and Topography of Coastal Lagoons Using Satellite Radar Altimetry: The Example of the Arcachon Bay in the Bay of Biscay

open access: yesRemote Sensing, 2018
Radar altimetry was initially designed to measure the marine geoid. Thanks to the improvement in the orbit determination from the meter to the centimeter level, this technique has been providing accurate measurements of the sea surface topography over ...
Vincent Hanquiez   +2 more
exaly   +2 more sources

Evaluation of historic and operational satellite radar altimetry missions for constructing consistent long-term lake water level records [PDF]

open access: yesHydrology and Earth System Sciences, 2021
A total of 13 satellite missions have been launched since 1985, with different types of radar altimeters on board. This study intends to make a comprehensive evaluation of historic and currently operational satellite radar altimetry missions for lake ...
S. Shu   +8 more
doaj   +1 more source

Joint analysis of coastal altimetry and high-frequency (HF) radar data: observability of seasonal and mesoscale ocean dynamics in the Bay of Biscay [PDF]

open access: yesOcean Science, 2018
Land-based coastal high-frequency (HF) radar systems provide operational measurements of coastal surface currents (within 1–3 m depth) with high spatial (300 m–10 km) and temporal ( ≤ 1 h) sampling resolutions, while the ...
I. Manso-Narvarte   +4 more
doaj   +1 more source

Retrieval of Snow Depth on Arctic Sea Ice From Surface‐Based, Polarimetric, Dual‐Frequency Radar Altimetry

open access: yesGeophysical Research Letters, 2023
Snow depth on sea ice is an Essential Climate Variable and a major source of uncertainty in satellite altimetry‐derived sea ice thickness. During winter of the MOSAiC Expedition, the “KuKa” dual‐frequency, fully polarized Ku‐ and Ka‐band radar was ...
R. Willatt   +23 more
semanticscholar   +1 more source

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