The ISAR Instrument Uncertainty Model
The ISAR Instrument Uncertainty Model
Measurements of sea surface temperature at the skin interface () made by an Infrared Sea Surface Temperature Autonomous Radiometer (ISAR) have been used for a number of years to validate satellite sea surface temperature (SST), especially high-accuracy observations such as made by the Advanced Along-Track Scanning Radiometer (AATSR). The ISAR instrument accuracy for measuring is ±0.1 K (Donlon et al.), but to satisfy Quality Assurance Framework for Earth Observation (QA4EO) principles and metrological standards (Joint Committee for Guides in Metrology), an uncertainty model is required. To develop the ISAR uncertainty model, all sources of uncertainty in the instrument are analyzed and an uncertainty value is assigned to each component. Finally, the individual uncertainty components are propagated through the ISAR retrieval algorithm to estimate a total uncertainty for each measurement. The resulting ISAR uncertainty model applied to a 12-yr archive of measurements from the Bay of Biscay shows that 77.6% of the data are expected to be within ±0.1 K and a further 17.2% are within 0.2 K.
ocean circulation, thermocline circulation, topographic effects, general circulation models
2415-2433
Wimmer, Werenfrid
7b66c35e-5f83-4f95-82e3-5ced9614f28d
Robinson, Ian S.
548399f7-f9eb-41ea-a28d-a248d3011edc
November 2016
Wimmer, Werenfrid
7b66c35e-5f83-4f95-82e3-5ced9614f28d
Robinson, Ian S.
548399f7-f9eb-41ea-a28d-a248d3011edc
Wimmer, Werenfrid and Robinson, Ian S.
(2016)
The ISAR Instrument Uncertainty Model.
Journal of Atmospheric and Oceanic Technology, 33 (11), .
(doi:10.1175/JTECH-D-16-0096.1).
Abstract
Measurements of sea surface temperature at the skin interface () made by an Infrared Sea Surface Temperature Autonomous Radiometer (ISAR) have been used for a number of years to validate satellite sea surface temperature (SST), especially high-accuracy observations such as made by the Advanced Along-Track Scanning Radiometer (AATSR). The ISAR instrument accuracy for measuring is ±0.1 K (Donlon et al.), but to satisfy Quality Assurance Framework for Earth Observation (QA4EO) principles and metrological standards (Joint Committee for Guides in Metrology), an uncertainty model is required. To develop the ISAR uncertainty model, all sources of uncertainty in the instrument are analyzed and an uncertainty value is assigned to each component. Finally, the individual uncertainty components are propagated through the ISAR retrieval algorithm to estimate a total uncertainty for each measurement. The resulting ISAR uncertainty model applied to a 12-yr archive of measurements from the Bay of Biscay shows that 77.6% of the data are expected to be within ±0.1 K and a further 17.2% are within 0.2 K.
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jtech-d-16-0096%2E1.pdf
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Accepted/In Press date: 6 May 2016
e-pub ahead of print date: 7 November 2016
Published date: November 2016
Keywords:
ocean circulation, thermocline circulation, topographic effects, general circulation models
Organisations:
Physical Oceanography
Identifiers
Local EPrints ID: 404629
URI: http://eprints.soton.ac.uk/id/eprint/404629
ISSN: 0739-0572
PURE UUID: 212444d0-d2ff-41a0-bb93-0b968a9cf936
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Date deposited: 12 Jan 2017 12:05
Last modified: 16 Mar 2024 03:39
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