Altimetric data of the ERS-2 mission
Altimetric data of the ERS-2 mission, Geophysical Data Record (GDR) in netCDF format. The ERS altimetry data are historically distributed at level 2 only for open ocean applications. CTOH has created a new version of the LEGOS ERS altimetry processing chain (Legrésy and Rémy, 1997), and has conducted a reanalysis of the ERS-2 altimetry waveforms using WAP data kindly provided by ESA. This reprocessing of the ERS-2 waveforms (WAP data) included a new implementation of the ICE-2 retracker algorithm, with additional altimetric corrections to make ERS-2 data compatible and homogenous with the ENVISAT mission for continuity and long-term altimetry data analysis over land and ice sheets. This processing contains the ICE-1 and ICE-2 retracking parameters and updated corrections. We have used GFZ precise orbits (Rudenko et al., 2014) for the period May 1995 - July 2003. We also computed a new dry troposphere correction with ERA-INTERIM fields valid over all surfaces (Blarel and Legresy, 2013) and a new Doppler correction accounting for the range rate (Blarel and Legresy, 2012). For each waveform parameter (range, backscatter, leading edge width and trailing edge slope) we computed empirical corrections to make them comparable to ENVISAT-v2.1. We produce a dataset providing continuity between the ERS-2 and ENVISAT missions (Blarel et al., 2015). While this ERS-2 product focuses on continental surfaces, an alternative REAPER ERS-2 product exists, tailored for ocean applications (ESA Reaper, 2015); they are hence complementary. They are available from May 1995 to June 2003 between 81.46°N and 81.46°S of latitude on this web page: http://ctoh.legos.obs-mip.fr/products/alongtrack-data/ers-2. The along-track spatial resolution is 350 m for high frequency data (20 Hz) and 7 km for low frequency data (1 Hz). The list of available parameters, including geographical locations, time of acquisition, all the variables necessary to compute the altimeter height, outputs from several geoid models and altimetry backscattering coefficients, is provided in the user handbook.
Overview
Lineage
Links
Downloads
- Product available through a AlTiS requests (just select ERS-2 product in the requests form). Product available through a AlTiS requests (just select ERS-2 product in the requests form).
Geolinks
- No links available
Others
- Link to Original Record [https://sedoo.fr/theia-publication-products] This metadata comes from sedoo.fr
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