Results 1 to 10 of about 1,060 (148)

Niger discharge from radar altimetry: bridging gaps between gauge and altimetry time series [PDF]

open access: yesHydrology and Earth System Sciences, 2019
The Niger River represents a challenging target for deriving discharge from spaceborne radar altimeter measurements, particularly since most terrestrial gauges ceased to provide data during the 2000s. Here, we propose deriving altimetric rating curves by
S. Schröder   +7 more
doaj   +5 more sources

Altimetry Method for an Interferometric Radar Altimeter Based on a Phase Quality Evaluation [PDF]

open access: yesSensors, 2023
A radar altimeter (RA) is useful to improve autonomous functions such as landing guidance or navigation control of an aircraft. To ensure more precise and safer flights by aircraft, an interferometric RA (IRA) capable of measuring the angle of a target ...
Jong-Soo Ha, Sung-Yong Hong
doaj   +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

Satellite radar altimetry for monitoring small rivers and lakes in Indonesia [PDF]

open access: yesHydrology and Earth System Sciences, 2015
Remote sensing and satellite geodetic observations are capable of hydrologic monitoring of freshwater resources. Although satellite radar altimetry has been used in monitoring water level or discharge, its use is often limited to monitoring large rivers (
Y. B. Sulistioadi   +7 more
doaj   +1 more source

Time-evolving mass loss of the Greenland Ice Sheet from satellite altimetry [PDF]

open access: yesThe Cryosphere, 2014
Mass changes of the Greenland Ice Sheet may be estimated by the input–output method (IOM), satellite gravimetry, or via surface elevation change rates (dH/dt).
R. T. W. L. Hurkmans   +6 more
doaj   +1 more source

Combining satellite radar altimetry, SAR surface soil moisture and GRACE total storage changes for hydrological model calibration in a large poorly gauged catchment [PDF]

open access: yesHydrology and Earth System Sciences, 2011
The availability of data is a major challenge for hydrological modelling in large parts of the world. Remote sensing data can be exploited to improve models of ungauged or poorly gauged catchments.
C. Milzow   +2 more
doaj   +1 more source

Quality analysis of water level series obtained by altimetric radar satellite along the São Francisco River

open access: yesRBRH, 2021
Radar altimeters are instruments carried on space missions and allow for determination of heights, particularly in oceans and ice sheets. The use of altimetry data on continental waters involves several challenges, such as the revisit frequency ...
Luana Kessia Lucas Alves Martins   +3 more
doaj   +1 more source

Real-time remote sensing driven river basin modeling using radar altimetry [PDF]

open access: yesHydrology and Earth System Sciences, 2011
Many river basins have a weak in-situ hydrometeorological monitoring infrastructure. However, water resources practitioners depend on reliable hydrological models for management purposes. Remote sensing (RS) data have been recognized as an alternative to
S. J. Pereira-Cardenal   +6 more
doaj   +1 more source

Evaluation of the Performances of Radar and Lidar Altimetry Missions for Water Level Retrievals in Mountainous Environment: The Case of the Swiss Lakes

open access: yesRemote Sensing, 2021
Radar altimetry is now commonly used to provide long-term monitoring of inland water levels in complement to or for replacing disappearing in situ networks of gauge stations.
Frédéric Frappart   +7 more
doaj   +1 more source

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