Next Article in Journal
Ensemble Modelling of Skipjack Tuna (Katsuwonus pelamis) Habitats in the Western North Pacific Using Satellite Remotely Sensed Data; a Comparative Analysis Using Machine-Learning Models
Next Article in Special Issue
Sensitivity of Altimeter Wave Height Assessment to Data Selection
Previous Article in Journal
Analyzing the Uncertainty of Degree Confluence Project for Validating Global Land-Cover Maps Using Reference Data-Based Classification Schemes
Previous Article in Special Issue
Global Assessments of the HY-2B Measurements and Cross-Calibrations with Jason-3
Open AccessArticle

Sentinel-3 Microwave Radiometers: Instrument Description, Calibration and Geophysical Products Performances

1
Collecte Localisation Satellites (CLS), 31520 Ramonville Saint-Agne, France
2
Centre National d’Etudes Spatiales (CNES), 18 avenue Edouard Belin, 31400 Toulouse, France
3
European Space Agency (ESA) European Space Research Institute (ESRIN), Largo Galileo Galilei 1, 00044 Frascati, Italy
4
European Space Agency (ESA) European Space Technology and Research Centre (ESTEC), Keplerlaan 1, 2201 AZ Noordwijk, The Netherlands
5
Thalès Alenia Space, 26 Avenue Jean François Champollion, 31100 Toulouse, France
6
Airbus Defence and Space S.A.U., former EADS CASA Espacio, 28022 Madrid, Spain
*
Author to whom correspondence should be addressed.
Remote Sens. 2020, 12(16), 2590; https://doi.org/10.3390/rs12162590
Received: 30 June 2020 / Revised: 31 July 2020 / Accepted: 4 August 2020 / Published: 12 August 2020
(This article belongs to the Special Issue Calibration and Validation of Satellite Altimetry)
Copernicus Sentinel-3 Surface Topography Mission embarks a two-channel microwave radiometer combined with the altimeter in order to correct the altimeter range for the excess path delay resulting from the presence of water vapour in the troposphere. The in-flight calibration of a single instrument is the critical point to achieve the expected performances. In the context of a constellation, the inter-calibration is even more important. After a presentation of the instrument design, we present the diagnoses used for the calibration of Sentinel-3A, using vicarious calibration over specific areas and double difference methods. The inter-calibration of Sentinel-3B with Sentinel-3A is performed during the tandem phase, using the residual differences of co-located measurements. Finally performances are assessed at crossover points with two parameters, first the wet troposphere correction by comparison with Jason-3; secondly on the Sea Surface Height by difference of variance. Analysis results have shown that Sentinel-3A is well calibrated, consistent with other instruments, and that Sentinel-3B is calibrated within 0.4 K with Sentinel-3A as a reference. Performances and stability fulfill the requirements for both missions. View Full-Text
Keywords: microwave radiometry; altimetry; calibration; Copernicus/Sentinel-3; vicarious calibration; ocean; model comparison microwave radiometry; altimetry; calibration; Copernicus/Sentinel-3; vicarious calibration; ocean; model comparison
Show Figures

Graphical abstract

MDPI and ACS Style

Frery, M.-L.; Siméon, M.; Goldstein, C.; Féménias, P.; Borde, F.; Houpert, A.; Olea Garcia, A. Sentinel-3 Microwave Radiometers: Instrument Description, Calibration and Geophysical Products Performances. Remote Sens. 2020, 12, 2590.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Search more from Scilit
 
Search
Back to TopTop