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Accuracy of the Mean Sea Level Continuous Record with Future Altimetric Missions: Jason-3 Vs. Sentinel-3A : Volume 12, Issue 4 (17/07/2015)

By Zawadzki, L.

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Book Id: WPLBN0004020865
Format Type: PDF Article :
File Size: Pages 26
Reproduction Date: 2015

Title: Accuracy of the Mean Sea Level Continuous Record with Future Altimetric Missions: Jason-3 Vs. Sentinel-3A : Volume 12, Issue 4 (17/07/2015)  
Author: Zawadzki, L.
Volume: Vol. 12, Issue 4
Language: English
Subject: Science, Ocean, Science
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Publication Date:
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications


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Ablain, M., & Zawadzki, L. (2015). Accuracy of the Mean Sea Level Continuous Record with Future Altimetric Missions: Jason-3 Vs. Sentinel-3A : Volume 12, Issue 4 (17/07/2015). Retrieved from

Description: Collecte Localisation Satellite (CLS), Ramonville Saint-Agne, France. The current mean sea level (MSL) continuous record, essential for the understanding of climate evolution, is computed with the altimetric measurements of the TOPEX/Poseidon mission, succeeded by Jason-1 and later Jason-2. The accurate continuity of the record is ensured by the conservation of the historical TOPEX orbit, but also by calibration phases between the successive missions which enable a rigorous computation of their relative biases. In order to extend the current MSL record, Jason-3 will be the natural successor of Jason-2: on the same orbit with a calibration phase. Shortly after Jason-3, another altimetric climate-oriented mission, Sentinel-3a, will be launched on a different orbit. In this paper, simulated altimetric sea level data is used to study the sensitivity of the MSL continuous record to the change of the historical orbit for the new Sentinel-3a orbit. By estimating the impact of the absence of calibration phase on the MSL continuous record trend accuracy at global and regional scale and the impact of the orbit change on the long-term continuity of this MSL record, this study shows that linking Sentinel-3a data instead of Jason-3 to the MSL continuous record would prevent from meeting climate users requirements regarding the MSL trend accuracy.

Accuracy of the mean sea level continuous record with future altimetric missions: Jason-3 vs. Sentinel-3a

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