First spaceborne GNSS-Reflectometry observations of hurricanes from the UK TechDemoSat-1 mission

Foti, Giuseppe ORCID: https://orcid.org/0000-0002-1507-2133; Gommenginger, Christine ORCID: https://orcid.org/0000-0002-6941-1671; Srokosz, Meric ORCID: https://orcid.org/0000-0002-7347-7411. 2017 First spaceborne GNSS-Reflectometry observations of hurricanes from the UK TechDemoSat-1 mission. Geophysical Research Letters, 44 (24). 12,358-12,366. https://doi.org/10.1002/2017GL076166

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Abstract/Summary

We present the first examples of GNSS-Reflectometry observations of hurricanes using spaceborne data from the UK TechDemoSat-1 (TDS-1) mission. We confirm that GNSS-R signals can detect ocean condition changes in very high near-surface ocean wind associated with hurricanes. TDS-1 GNSS-R reflections were collocated with IBTrACS hurricane data, MetOp ASCAT A/B scatterometer winds and two re-analysis products. Clear variations of GNSS-R reflected power (σ0) are observed as reflections travel through hurricanes, in some cases up to and through the eye wall. The GNSS-R reflected power is tentatively inverted to estimate wind speed using the TDS-1 baseline wind retrieval algorithm developed for low to moderate winds. Despite this, TDS-1 GNSS-R winds through the hurricanes show closer agreement with IBTrACS estimates than winds provided by scatterometers and reanalyses. GNSS-R wind profiles show realistic spatial patterns and sharp gradients which are consistent with expected structures around the eye of tropical cyclones.

Item Type:	Publication - Article
Digital Object Identifier (DOI):	https://doi.org/10.1002/2017GL076166
ISSN:	00948276
Date made live:	13 Dec 2017 13:39 +0 (UTC)
URI:	https://nora.nerc.ac.uk/id/eprint/518689

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