Results 111 to 120 of about 436,480 (263)

National Air Traffic Services [PDF]

, 2004
National Air Traffic Services (NATS) are concerned with ensuring low probabilities of errors in determining aircraft positions. In general, error probabilities depend on the tails of some probability distributions for which there has been no theoretical ...
Andre Leger, Andre, Budd, Chris, Hill, Andrew   +2 more
core  

Compensating Changes in the Penetration Depth of Pulse-Limited Radar Altimetry Over the Greenland Ice Sheet

IEEE Transactions on Geoscience and Remote Sensing, 2019
Changes in firn properties affect the shape of pulse-limited radar altimeter echoes acquired over the polar ice sheets. We apply a waveform deconvolution model to CryoSat-2 low-resolution mode echoes to determine the depth distribution of radar ...
T. Slater, A. Shepherd, M. McMillan, T. Armitage, Inès N. Otosaka, R. Arthern   +5 more
semanticscholar   +1 more source

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

Frontiers 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 ...
L. Gray, D. Burgess, L. Copland, K. Langley, P. Gogineni, J. Paden, C. Leuschen, D. van As, R. Fausto, I. Joughin, Ben E. Smith   +10 more
semanticscholar   +1 more source

Beyond Exact Repeat Missions: Embracing Geodetic Altimetry for Inland Water Monitoring and Modeling

Journal of Remote Sensing
Satellite radar altimetry has become an essential tool for hydrological research over the past 2 decades. Unlike imagery that quantifies the water dynamics from the horizontal dimension, altimetry observations deliver vertical information, which is ...
Liguang Jiang, Karina Nielsen, Ole B. Andersen   +2 more
doaj   +1 more source

Infilling Missing Data in Hydrology: Solutions Using Satellite Radar Altimetry and Multiple Imputation for Data-Sparse Regions

Water, 2018
In developing regions missing data are prevalent in historical hydrological datasets, owing to financial, institutional, operational and technical challenges.
I. Ekeu-wei, G. A. Blackburn, P. Pedruco
semanticscholar   +1 more source

InSAR observations of ice elevation and velocity fluctuations at the Flade Isblink ice cap, eastern North Greenland [PDF]

, 2010
The 8500 km(2) Flade Isblink ice cap (FIIC) (81 degrees 15'N, 15 degrees 0'W) is the largest ice cap in Greenland. We use repeat-pass interferometric synthetic aperture radar (InSAR) techniques to investigate the form and flow of the FIIC.
Andrew Shepherd, Atwood, Aud Sundal, Bartholomew, Bingham, Boon, Brenner, Dall, Das, DiMarzio, DiMarzio, Eero Rinnem, Gens, Goldstein, Hall, Helk, Higgins, Hoen, Iken, Iken, Joughin, Joughin, Joughin, Joughin, Kelly, Koch, Krabill, Kwok, Maidment, Massonnet, Mikkelsen, Mohr, Paterson, Peter Nienow, Pritchard, Rignot, Rosen, Scharroo, Schutz, Shepherd, Shepherd, Steffen, Steven J. Palmer, Werner, Zwally, Zwally, Zwally   +46 more
core   +1 more source

Secular Trends in Global Tides derived from Satellite Radar Altimetry

Journal of Geophysical Research: Oceans, 2022
I. Bij de Vaate, D. C. Slobbe, M. Verlaan   +2 more
semanticscholar   +1 more source

Daily River Discharge Estimation Using Multi-Mission Radar Altimetry Data and Ensemble Learning Regression in the Lower Mekong River Basin

Remote Sensing, 2019
Estimating river discharge (Q) is critical for ecosystems and water resource management. Traditionally, estimating Q has depended on a single rating curve or the Manning equation. In contrast to the single rating curve, several rating curves at different
Donghwan Kim, Hyongki Lee, Chi-Hung Chang, D. Bui, S. Jayasinghe, S. Basnayake, F. Chishtie, E. Hwang   +7 more
semanticscholar   +1 more source

Problem footprints in Magellan altimetry data [PDF]

The intensity, time-delay, and frequency content of radar echoes from the Magellan altimetry system are reduced to several parameters that are of great use in addressing many geological issues of the surface of Venus.
Plaut, Jeffrey J.
core   +1 more source

Impact of high frequency waves on the ocean altimeter range bias [PDF]

, 2009
New aircraft observations are presented on the range determination error in satellite altimetry associated with ocean waves. Laser-based measurements of the cross correlation between the gravity wave slope and elevation are reported for the first time ...
Campbell, J. W., Chapron, Bertrand, Elfouhaily, T., Vandemark, Douglas C.   +3 more
core   +1 more source