Backscattering signatures at Ka, Ku, C and S bands from low resolution radar altimetry over land
International audience Radar backscattering coefficients from synthetic aperture radars and scatterometers are commonly used to characterize the land surface properties and monitor their temporal evolution. Radar altimetry is mostly used, over land, to provide time series of water stage of lakes, ri...
Published in: | Advances in Space Research |
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Main Authors: | , , , , , , , , , , , |
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Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2020
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Online Access: | https://hal.archives-ouvertes.fr/hal-02972926 https://doi.org/10.1016/j.asr.2020.06.043 |
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ftccsdartic:oai:HAL:hal-02972926v1 |
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Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
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language |
English |
topic |
Radar altimetry Backscattering Land surface properties [PHYS]Physics [physics] [SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph] |
spellingShingle |
Radar altimetry Backscattering Land surface properties [PHYS]Physics [physics] [SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph] Frappart, Frédéric Blarel, Fabien Papa, Fabrice Prigent, Catherine Mougin, Éric Paillou, Philippe Baup, Frédéric Zeiger, Pierre Salameh, Edward Darrozes, José Bourrel, Luc Rémy, Frédérique Backscattering signatures at Ka, Ku, C and S bands from low resolution radar altimetry over land |
topic_facet |
Radar altimetry Backscattering Land surface properties [PHYS]Physics [physics] [SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph] |
description |
International audience Radar backscattering coefficients from synthetic aperture radars and scatterometers are commonly used to characterize the land surface properties and monitor their temporal evolution. Radar altimetry is mostly used, over land, to provide time series of water stage of lakes, rivers and wetlands and the topography of the ice sheets. Very few studies used the radar altimetry backscattering coefficients for geophysical applications except to determine changes in Arctic lakes state surface, surface soil moisture in semi-arid environments or flood extent at high latitude. As radar altimetry missions acquired data in four frequency bands (mostly C and Ku but also S and Ka), this study proposes the first thorough analysis of the backscattering signatures of land surfaces using observations from ERS-2, Jason-1, ENVISAT, Jason-2 and SARAL radar altimetry missions The spatial and temporal variations of several altimetric information (backscattering coefficient, waveform peakiness, leading edge width and trailing edge slope) are examined at global scale, for each frequency band separately, as well as for their differences. Their relationship with related variations in the surface characteristics (i.e., soil type, soil moisture, presence of water and snow) are evidenced. Finally, spatial patterns and temporal variations computed over selected regions, representative of the major bioclimatic areas, are related to their surface properties and changes. |
author2 |
Laboratoire d'Etude du Rayonnement et de la Matière en Astrophysique (LERMA (UMR_8112)) Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-CY Cergy Paris Université (CY) ASP 2020 Laboratoire d'Astrophysique de Bordeaux Pessac (LAB) Université de Bordeaux (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Bordeaux (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) Centre d'études spatiales de la biosphère (CESBIO) Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Université Toulouse III - Paul Sabatier (UT3) Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP) Météo France-Centre National d'Études Spatiales Toulouse (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Frappart, Frédéric Blarel, Fabien Papa, Fabrice Prigent, Catherine Mougin, Éric Paillou, Philippe Baup, Frédéric Zeiger, Pierre Salameh, Edward Darrozes, José Bourrel, Luc Rémy, Frédérique |
author_facet |
Frappart, Frédéric Blarel, Fabien Papa, Fabrice Prigent, Catherine Mougin, Éric Paillou, Philippe Baup, Frédéric Zeiger, Pierre Salameh, Edward Darrozes, José Bourrel, Luc Rémy, Frédérique |
author_sort |
Frappart, Frédéric |
title |
Backscattering signatures at Ka, Ku, C and S bands from low resolution radar altimetry over land |
title_short |
Backscattering signatures at Ka, Ku, C and S bands from low resolution radar altimetry over land |
title_full |
Backscattering signatures at Ka, Ku, C and S bands from low resolution radar altimetry over land |
title_fullStr |
Backscattering signatures at Ka, Ku, C and S bands from low resolution radar altimetry over land |
title_full_unstemmed |
Backscattering signatures at Ka, Ku, C and S bands from low resolution radar altimetry over land |
title_sort |
backscattering signatures at ka, ku, c and s bands from low resolution radar altimetry over land |
publisher |
HAL CCSD |
publishDate |
2020 |
url |
https://hal.archives-ouvertes.fr/hal-02972926 https://doi.org/10.1016/j.asr.2020.06.043 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
ISSN: 0273-1177 Advances in Space Research https://hal.archives-ouvertes.fr/hal-02972926 Advances in Space Research, Elsevier, 2020, 68 (2), pp.989-1012. ⟨10.1016/j.asr.2020.06.043⟩ |
op_relation |
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op_doi |
https://doi.org/10.1016/j.asr.2020.06.043 |
container_title |
Advances in Space Research |
container_volume |
68 |
container_issue |
2 |
container_start_page |
989 |
op_container_end_page |
1012 |
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1766340814363951104 |
spelling |
ftccsdartic:oai:HAL:hal-02972926v1 2023-05-15T15:09:40+02:00 Backscattering signatures at Ka, Ku, C and S bands from low resolution radar altimetry over land Frappart, Frédéric Blarel, Fabien Papa, Fabrice Prigent, Catherine Mougin, Éric Paillou, Philippe Baup, Frédéric Zeiger, Pierre Salameh, Edward Darrozes, José Bourrel, Luc Rémy, Frédérique Laboratoire d'Etude du Rayonnement et de la Matière en Astrophysique (LERMA (UMR_8112)) Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-CY Cergy Paris Université (CY) ASP 2020 Laboratoire d'Astrophysique de Bordeaux Pessac (LAB) Université de Bordeaux (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Bordeaux (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) Centre d'études spatiales de la biosphère (CESBIO) Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Université Toulouse III - Paul Sabatier (UT3) Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP) Météo France-Centre National d'Études Spatiales Toulouse (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS) 2020-07 https://hal.archives-ouvertes.fr/hal-02972926 https://doi.org/10.1016/j.asr.2020.06.043 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.asr.2020.06.043 hal-02972926 https://hal.archives-ouvertes.fr/hal-02972926 BIBCODE: 2021AdSpR.68.989F doi:10.1016/j.asr.2020.06.043 WOS: 000659783700001 ISSN: 0273-1177 Advances in Space Research https://hal.archives-ouvertes.fr/hal-02972926 Advances in Space Research, Elsevier, 2020, 68 (2), pp.989-1012. ⟨10.1016/j.asr.2020.06.043⟩ Radar altimetry Backscattering Land surface properties [PHYS]Physics [physics] [SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph] info:eu-repo/semantics/article Journal articles 2020 ftccsdartic https://doi.org/10.1016/j.asr.2020.06.043 2021-12-25T23:38:48Z International audience Radar backscattering coefficients from synthetic aperture radars and scatterometers are commonly used to characterize the land surface properties and monitor their temporal evolution. Radar altimetry is mostly used, over land, to provide time series of water stage of lakes, rivers and wetlands and the topography of the ice sheets. Very few studies used the radar altimetry backscattering coefficients for geophysical applications except to determine changes in Arctic lakes state surface, surface soil moisture in semi-arid environments or flood extent at high latitude. As radar altimetry missions acquired data in four frequency bands (mostly C and Ku but also S and Ka), this study proposes the first thorough analysis of the backscattering signatures of land surfaces using observations from ERS-2, Jason-1, ENVISAT, Jason-2 and SARAL radar altimetry missions The spatial and temporal variations of several altimetric information (backscattering coefficient, waveform peakiness, leading edge width and trailing edge slope) are examined at global scale, for each frequency band separately, as well as for their differences. Their relationship with related variations in the surface characteristics (i.e., soil type, soil moisture, presence of water and snow) are evidenced. Finally, spatial patterns and temporal variations computed over selected regions, representative of the major bioclimatic areas, are related to their surface properties and changes. Article in Journal/Newspaper Arctic Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Arctic Advances in Space Research 68 2 989 1012 |