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Open AccessArticle

Analysis of Sentinel-1 Radiometric Stability and Quality for Land Surface Applications

1
IRSTEA, UMR TETIS, 500 rue François Breton, 34093 Montpellier cedex 5, France
2
CNRS, CESBIO, 18 av. Edouard Belin, bpi 2801, 31401 Toulouse cedex 9, France
3
ONERA, BA 701 13661 Salon Cedex AIR, 13661 Salon-de-Provence, France
*
Author to whom correspondence should be addressed.
Academic Editors: Richard Müller and Prasad S. Thenkabail
Remote Sens. 2016, 8(5), 406; https://doi.org/10.3390/rs8050406
Received: 1 March 2016 / Revised: 27 April 2016 / Accepted: 4 May 2016 / Published: 11 May 2016
Land monitoring using temporal series of Synthetic Aperture Radar (SAR) images requires radiometrically well calibrated sensors. In this paper, the radiometric stability of the new SAR Sentinel-1A “S-1A” sensor was first assessed by analyzing temporal variations of the backscattering coefficient (σ°) returned from invariant targets. Second, the radiometric level of invariant targets was compared from S-1A and Radarsat-2 “RS-2” data. The results show three stable sub-time series of S-1A data. The first (between 1 October 2014 and 19 March 2015) and third (between 25 November 2015 and 1 February 2016) sub-time series have almost the same mean σ°-values (a difference lower than 0.3 dB). The mean σ°-value of the second sub-time series (between 19 March 2015 and 25 November 2015) is higher than that of the first and the third sub-time series by roughly 0.9 dB. Moreover, our results show that the stability of each sub-time series is better than 0.48 dB. In addition, the results show that S-1A images of the first and third sub-time series appear to be well calibrated in comparison to RS-2 data, with a difference between S-1A and RS-2 lower than 0.3 dB. However, the S-1A images of the second sub-time series have σ°-values that are higher than those from RS-2 by roughly 1 dB. View Full-Text
Keywords: Synthetic Aperture Radar; Sentinel-1A; radiometric stability and quality; Radarsat-2 Synthetic Aperture Radar; Sentinel-1A; radiometric stability and quality; Radarsat-2
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MDPI and ACS Style

El Hajj, M.; Baghdadi, N.; Zribi, M.; Angelliaume, S. Analysis of Sentinel-1 Radiometric Stability and Quality for Land Surface Applications. Remote Sens. 2016, 8, 406. https://doi.org/10.3390/rs8050406

AMA Style

El Hajj M, Baghdadi N, Zribi M, Angelliaume S. Analysis of Sentinel-1 Radiometric Stability and Quality for Land Surface Applications. Remote Sensing. 2016; 8(5):406. https://doi.org/10.3390/rs8050406

Chicago/Turabian Style

El Hajj, Mohammad; Baghdadi, Nicolas; Zribi, Mehrez; Angelliaume, Sébastien. 2016. "Analysis of Sentinel-1 Radiometric Stability and Quality for Land Surface Applications" Remote Sens. 8, no. 5: 406. https://doi.org/10.3390/rs8050406

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Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

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