The CryoSat SciEnce-oriented data ANalysis over sea-ICE areas project
Event: 2017 Ocean Surface Topography Science Team Meeting
Session: Science IV: 25 years of satellite altimetry for Cryosphere and Hydrology: from experimental to emerging operational applications
Presentation type: Type Poster
- to provide an independent evaluation of Baseline-C operational IPF2 freeboard products,
- to support ESA in the definition of future CryoSat IPF evolutions based on the outcomes of targeted R&D activities focusing on CryoSat data analysis over sea-ice areas,
- to study, prototype, test new or optimized algorithms that may impact IPF-1 and/or IPF-2,
- to study, prototype, test new freeboard products.
A team with very complementary expertises has been set to address the complex subject of sea-ice remote sensing from both the high spatial diversity and the strong temporal variability aspects due to the sea-ice physics, meteorological events as well as local surface currents.
Dedicated science oriented tools therefore need to be put in place to make best profit of both in situ data and imagery to thoroughly understand the signatures within the altimeter signals.
It is expected that some of the CryoSat Ice Processor limitations be detected/analysed through a refined analysis of the physics behind the Ku band SAR/SARin altimeter products and Ka band products over the Sea-Ice domain.
The team will also implement and assess the outputs of new/recent geophysical retrackers.
The various aspects and steps of the projects will be presented : Refine the surface type detection; Improve retracking using physical based retrackers instead of threshold based retrackers ; Tackle continuity issues (proper retracking of specular and brownian WF in sequence, off-nadir hookings, side lobe contamination effects, freeboard continuity especially at the pack ice - fast ice transitions and between SAR and SARIN modes), assess snow cover impact onto freeboard and ice-thickness measurements, Analyse and Improve the existing freeboard SNR, Study, Prototype and Assess new freeboard measurement techniques, Exploit SARIN mode for freeboard measurement, test SARIN swath-altimetry over sea-ice.