An attempt to perform inter-band calibration validation for Sentinel-2 using snowy sites such as DomeC in Antarctica
International audience In the frame of the monitoring of Sentinel 2 MSI sensors in orbit, a method for inter-band calibration validation, using Antarctic site, has been developed and tested. The method relies on the directional hemispheric reflectance found in ASTER data base. In order to consider t...
Published in: | Sensors, Systems, and Next-Generation Satellites XXIII |
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ftccsdartic:oai:HAL:hal-02409754v1 2023-05-15T13:46:13+02:00 An attempt to perform inter-band calibration validation for Sentinel-2 using snowy sites such as DomeC in Antarctica Une tentative de validation de l'étalonnage inter-bande de Sentinel 2 à partir de sites neigeux tels que Dome c en Antarctique Viallefont-Robinet, Françoise ONERA / DOTA, Université de Toulouse Toulouse ONERA-PRES Université de Toulouse Strasbourg, France 2019-09-09 https://hal.archives-ouvertes.fr/hal-02409754 https://hal.archives-ouvertes.fr/hal-02409754/document https://hal.archives-ouvertes.fr/hal-02409754/file/DOTA19188.1571908876_preprint.pdf https://doi.org/10.1117/12.2532851 en eng HAL CCSD info:eu-repo/semantics/altIdentifier/doi/10.1117/12.2532851 hal-02409754 https://hal.archives-ouvertes.fr/hal-02409754 https://hal.archives-ouvertes.fr/hal-02409754/document https://hal.archives-ouvertes.fr/hal-02409754/file/DOTA19188.1571908876_preprint.pdf doi:10.1117/12.2532851 info:eu-repo/semantics/OpenAccess SPIE Remote Sensing 2019 https://hal.archives-ouvertes.fr/hal-02409754 SPIE Remote Sensing 2019, Sep 2019, Strasbourg, France. ⟨10.1117/12.2532851⟩ INTER-BANDE ETALONNAGE VALIDATION TELEDETECTION SENTINEL 2 ANTARCTIQUE ETALONNAGE RADIOMETRIQUE CALIBRATION [SPI]Engineering Sciences [physics] [PHYS]Physics [physics] info:eu-repo/semantics/conferenceObject Conference papers 2019 ftccsdartic https://doi.org/10.1117/12.2532851 2021-11-07T01:27:27Z International audience In the frame of the monitoring of Sentinel 2 MSI sensors in orbit, a method for inter-band calibration validation, using Antarctic site, has been developed and tested. The method relies on the directional hemispheric reflectance found in ASTER data base. In order to consider that the spectral shape of the directional directional reflectance is the same as the directional hemispheric one, wavelengths have to be limited to the spectral range below 0.9 µm. Thus this method cannot perform the inter-band calibration for the whole set of spectral bands of MSI but only from B1 to B8A. Results for B9 seem also correct although the central wavelength is a little bit beyond 0.9 µm. Given a clear day acquisition on DomeC site, a first set of computations of Top Of Atmosphere (TOA) reflectances for MSI spectral bands is performed using the three ASTER reflectances corresponding respectively to small, medium and coarse grain size for snow. The spectral reflectances are normalized by the B2 value. The comparison of the three normalized TOA reflectances to the actual one given by MSI enables to select the right snow grain size. Then the second step is the atmospheric parameters adjustment. Water content is assessed thanks to B9 band centered at 0.945 µm and ozone is assessed thanks to mainly B3 band centered at 0.56 µm. For a clear day, the aerosol optical thickness is weak and thus the TOA reflectance is not very sensitive to the more or less low abundance of continental aerosols. The ratio of normalized reflectance given by MSI to the normalized reflectance given by the computation is assessed for each spectral band between B1 and B9 and is compared to the inter-band calibration validations performed with other methods. Dans le cadre du suivi en orbite du capteur MSI de Sentinel 2, une méthode de validation de l'étalonnage inter-bande a été développée et testée. La méthode s'appuie sur la réflectance hémisphérique - directionnelle que l'on trouve dans la base de données ASTER. Pour pouvoir ... Conference Object Antarc* Antarctic Antarctica Antarctique* Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Antarctic Sensors, Systems, and Next-Generation Satellites XXIII 64 |
institution |
Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
INTER-BANDE ETALONNAGE VALIDATION TELEDETECTION SENTINEL 2 ANTARCTIQUE ETALONNAGE RADIOMETRIQUE CALIBRATION [SPI]Engineering Sciences [physics] [PHYS]Physics [physics] |
spellingShingle |
INTER-BANDE ETALONNAGE VALIDATION TELEDETECTION SENTINEL 2 ANTARCTIQUE ETALONNAGE RADIOMETRIQUE CALIBRATION [SPI]Engineering Sciences [physics] [PHYS]Physics [physics] Viallefont-Robinet, Françoise An attempt to perform inter-band calibration validation for Sentinel-2 using snowy sites such as DomeC in Antarctica |
topic_facet |
INTER-BANDE ETALONNAGE VALIDATION TELEDETECTION SENTINEL 2 ANTARCTIQUE ETALONNAGE RADIOMETRIQUE CALIBRATION [SPI]Engineering Sciences [physics] [PHYS]Physics [physics] |
description |
International audience In the frame of the monitoring of Sentinel 2 MSI sensors in orbit, a method for inter-band calibration validation, using Antarctic site, has been developed and tested. The method relies on the directional hemispheric reflectance found in ASTER data base. In order to consider that the spectral shape of the directional directional reflectance is the same as the directional hemispheric one, wavelengths have to be limited to the spectral range below 0.9 µm. Thus this method cannot perform the inter-band calibration for the whole set of spectral bands of MSI but only from B1 to B8A. Results for B9 seem also correct although the central wavelength is a little bit beyond 0.9 µm. Given a clear day acquisition on DomeC site, a first set of computations of Top Of Atmosphere (TOA) reflectances for MSI spectral bands is performed using the three ASTER reflectances corresponding respectively to small, medium and coarse grain size for snow. The spectral reflectances are normalized by the B2 value. The comparison of the three normalized TOA reflectances to the actual one given by MSI enables to select the right snow grain size. Then the second step is the atmospheric parameters adjustment. Water content is assessed thanks to B9 band centered at 0.945 µm and ozone is assessed thanks to mainly B3 band centered at 0.56 µm. For a clear day, the aerosol optical thickness is weak and thus the TOA reflectance is not very sensitive to the more or less low abundance of continental aerosols. The ratio of normalized reflectance given by MSI to the normalized reflectance given by the computation is assessed for each spectral band between B1 and B9 and is compared to the inter-band calibration validations performed with other methods. Dans le cadre du suivi en orbite du capteur MSI de Sentinel 2, une méthode de validation de l'étalonnage inter-bande a été développée et testée. La méthode s'appuie sur la réflectance hémisphérique - directionnelle que l'on trouve dans la base de données ASTER. Pour pouvoir ... |
author2 |
ONERA / DOTA, Université de Toulouse Toulouse ONERA-PRES Université de Toulouse |
format |
Conference Object |
author |
Viallefont-Robinet, Françoise |
author_facet |
Viallefont-Robinet, Françoise |
author_sort |
Viallefont-Robinet, Françoise |
title |
An attempt to perform inter-band calibration validation for Sentinel-2 using snowy sites such as DomeC in Antarctica |
title_short |
An attempt to perform inter-band calibration validation for Sentinel-2 using snowy sites such as DomeC in Antarctica |
title_full |
An attempt to perform inter-band calibration validation for Sentinel-2 using snowy sites such as DomeC in Antarctica |
title_fullStr |
An attempt to perform inter-band calibration validation for Sentinel-2 using snowy sites such as DomeC in Antarctica |
title_full_unstemmed |
An attempt to perform inter-band calibration validation for Sentinel-2 using snowy sites such as DomeC in Antarctica |
title_sort |
attempt to perform inter-band calibration validation for sentinel-2 using snowy sites such as domec in antarctica |
publisher |
HAL CCSD |
publishDate |
2019 |
url |
https://hal.archives-ouvertes.fr/hal-02409754 https://hal.archives-ouvertes.fr/hal-02409754/document https://hal.archives-ouvertes.fr/hal-02409754/file/DOTA19188.1571908876_preprint.pdf https://doi.org/10.1117/12.2532851 |
op_coverage |
Strasbourg, France |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic Antarctica Antarctique* |
genre_facet |
Antarc* Antarctic Antarctica Antarctique* |
op_source |
SPIE Remote Sensing 2019 https://hal.archives-ouvertes.fr/hal-02409754 SPIE Remote Sensing 2019, Sep 2019, Strasbourg, France. ⟨10.1117/12.2532851⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1117/12.2532851 hal-02409754 https://hal.archives-ouvertes.fr/hal-02409754 https://hal.archives-ouvertes.fr/hal-02409754/document https://hal.archives-ouvertes.fr/hal-02409754/file/DOTA19188.1571908876_preprint.pdf doi:10.1117/12.2532851 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1117/12.2532851 |
container_title |
Sensors, Systems, and Next-Generation Satellites XXIII |
container_start_page |
64 |
_version_ |
1766238503850475520 |