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Sentinel-3 Delay-Doppler altimetry over Antarctica by Malcolm McMillan; Alan Muir; Andrew Shepherd; Roger Escolà; Mònica Roca; Jérémie Aublanc; Pierre Thibaut; Marco Restano; Américo Ambrozio; Jérôme Benveniste is a Earth and Planetary Sciences article available to read on EtoBox.

What is Sentinel-3 Delay-Doppler altimetry over Antarctica about?

Abstract. The launch of Sentinel-3A in February 2016 represented the beginning of a new long-term series of operational satellite radar altimeters, which will provide Delay-Doppler altimetry measurements over ice sheets for decades to come. Given the potential benefits that these satellites can offer to a range of glaciological applications, it is important to establish their capacity to monitor ice sheet elevation and elevation change. Here, we present the first analysis of Sentinel-3 Delay-Doppler altimetry over the Antarctic ice sheet, and assess the accuracy and precision of retrievals of ice sheet elevation across a range of topographic regimes. Over the low-slope regions of the ice sheet interior, we find that the instrument achieves both an accuracy and a precision of the order of 10 cm, with ∼98 % of the data validated being within 50 cm of co-located airborne measurements. Across the steeper and more complex topography of the ice sheet margin, the accuracy decreases, although analysis at two coastal sites with densely surveyed airborne campaigns shows that ∼60 %–85 % of validated data are still within 1 m of co-located airborne elevation measurements. We then explore the u

Who reads Sentinel-3 Delay-Doppler altimetry over Antarctica?

Author

Malcolm McMillan; Alan Muir; Andrew Shepherd; Roger Escolà; Mònica Roca; Jérémie Aublanc; Pierre Thibaut; Marco Restano; Américo Ambrozio; Jérôme Benveniste

Publisher

Copernicus GmbH; Copernicus Group; Göttingen: Copernicus Publ. (ISSN 1994-0424)

Published

2019

Language

EN

Field

Earth and Planetary Sciences (Physical Sciences)