Altimetry - an overview | ScienceDirect Topics Satellite altimetry is a technique of measuring heights of the Earth's surface from a satellite flying at an attitude of about 1000 km The objective of altimetry is to measure principally sea surface height to an accuracy of about ±1 cm, continuously, objectively, and on a global scale
Altimetry - an overview | ScienceDirect Topics Altimetry for polar ice caps started in 1991 with the launch of the European satellite ERS-1 In almost 25 years, this instrument has allowed us to make progress on numerous subjects However, relatively cumbersome processes of different complexity were necessary, from reprocessing of the waveform to the construction of a topographic map
A review of altimetry waveform retracking for inland water levels Altimetry missions, including radar and laser altimetry, have provided data that greatly enhances the accuracy of nadir-ranging-based water levels The majority of altimetry data are from nadir radar altimeters Radar altimetry data processing has improved tracking, geophysical correction, and waveform retracking
Advances in estimating Sea Level Rise: A review of tide gauge . . . The quasi-global satellite altimetry confirmed that the variations in sea level is ocean-wide, providing further insights on tide gauge measurements which suggest regional variability Complementing tide gauge data with satellite altimetry data would increase existing knowledge of global, regional and coastal sea level variations
Fiducial reference systems for time and coordinates in satellite altimetry New altimetry missions, such as Sentinel-6 Jason-CS, CRISTAL (Polar Ice and Snow Topography) but also other international or national altimeters such as SWOT (Morrow et al , 2019), HY-2C, Quanlan (Chen et al , 2019), among others, and the operational Sentinel-3, Jason-3, HY-2B, CryoSat-2, IceSat-2, set new standards and expectations for time
Satellite Altimetry - an overview | ScienceDirect Topics Satellite altimetry over open and coastal oceans was established as a mature discipline; in 2018, it celebrated its first 25 years with an exceptional symposium on “25 Years of Progress in Radar Altimetry” in Portugal Through the event, the challenges and achievements of altimetry outreach were reviewed
Wave influence on altimetry sea level at the coast The rapid improvements in altimetry processing algorithms and in altimetry technology (e g the new generation of altimeters with a SAR measurement mode) allow new experimental coastal altimetry datasets, with sea level estimates even closer to the coast (up to 1–2 km, Birol et al , 2021) However, as these measurements are collected closer
Mountain snow depth retrievals from customized processing of ICESat-2 . . . The NASA ICESat-2 mission has provided over four years of global satellite laser altimetry measurements since October 2018 Previous studies have shown that standard ICESat-2 data products, when combined with snow-off digital terrain models (DTMs) from airborne laser scanning, have the potential to provide snow depth measurements with varying
Enhancing the temporal resolution of water levels from altimetry using . . . Fig 7 shows daily in-situ water levels (h G) and satellite altimetry water levels (h A) after cleaning the radar altimetry observations The availability period of the Sentinel-3 altimetry observations is from March 2016 to January 2021 for all lakes except for Lake Mälaren and Lake Båven, as only Sentinel-3B data were available over these