Combining airborne photographs and spaceborne SAR data to monitor temperate glaciers. Potentials and limits
Emmanuel Trouvé
(1)
,
Gabriel Vasile
(2)
,
Michel Gay
(1, 3)
,
Lionel Bombrun
(1)
,
Pierre Grussenmeyer
(4)
,
Tania Landes
(4)
,
Philippe Bolon
(2)
,
Ivan Petillot
(2)
,
Jean-Marie Nicolas
(5)
,
Andreea Julea
(2)
,
Jocelyn Chanussot
(1)
,
Mathieu Koehl
(4)
,
Lionel Valet
(2)
1
GIPSA-SIGMAPHY -
GIPSA - Signal Images Physique
2 LISTIC - Laboratoire d'Informatique, Systèmes, Traitement de l'Information et de la Connaissance
3 GIPSA-Services - GIPSA-Services
4 MAP - Modèles et simulation pour l'architecture, l'urbanisme et le paysage
5 LTSI - Laboratoire Traitement du Signal et de l'Image
2 LISTIC - Laboratoire d'Informatique, Systèmes, Traitement de l'Information et de la Connaissance
3 GIPSA-Services - GIPSA-Services
4 MAP - Modèles et simulation pour l'architecture, l'urbanisme et le paysage
5 LTSI - Laboratoire Traitement du Signal et de l'Image
Emmanuel Trouvé
- Fonction : Auteur
- PersonId : 1358147
- ORCID : 0000-0003-2140-3303
- IdRef : 035526211
Gabriel Vasile
- Fonction : Auteur
- PersonId : 6912
- IdHAL : gabriel-vasile
- ORCID : 0000-0002-6458-3634
- IdRef : 120253240
Michel Gay
- Fonction : Auteur
- PersonId : 18973
- IdHAL : michel-gay
- ORCID : 0000-0003-1748-0955
Lionel Bombrun
- Fonction : Auteur
- PersonId : 1189
- IdHAL : lionel-bombrun
- ORCID : 0000-0001-9036-3988
- IdRef : 137837461
Pierre Grussenmeyer
- Fonction : Auteur
- PersonId : 749150
- IdHAL : pierre-grussenmeyer
- ORCID : 0000-0002-7292-2755
- IdRef : 035306858
Andreea Julea
- Fonction : Auteur
- PersonId : 874247
Jocelyn Chanussot
- Fonction : Auteur
- PersonId : 21313
- IdHAL : jocelyn-chanussot
- ORCID : 0000-0003-4817-2875
- IdRef : 104503181
Résumé
Monitoring temperate glacier activity has become more and more necessary for economical and security reasons and as an indicator of the local effects of global climate change. Remote sensing data provide useful information on such complex geophysical objects, but they require specific processing tech- niques to cope with the difficult context of moving and changing features in high-relief areas. This paper presents the first results of a project involving four laboratories developing and combining specific methods to extract information from optical and synthetic aperture radar (SAR) data. Two different information sources are processed, namely: 1) airborne photography and 2) spaceborne C-band SAR interferometry. The difficulties and limitations of their processing in the context of Alpine glaciers are discussed and illustrated on two glaciers located in the Mont-Blanc area. The results obtained by aerial triangulation techniques provide digital terrain models with an accuracy that is better than 30 cm, which is compatible with the computation of volume balance and useful for precise georeferencing and slope measurement updating. The results obtained by SAR differential interferometry using European Remote Sensing Satellite images show that it is possible to measure temperate glacier surface velocity fields from October to April in one-day interferograms with approximately 20-m ground sampling. This allows to derive ice surface strain rate fields required to model the glacier flow. These different measurements are complementary to results obtained during the summer from satellite optical data and ground measurements that are available only in few accessible points.
Format du dépôt | Fichier |
---|---|
Type de dépôt | Article dans une revue |
Résumé |
en
Monitoring temperate glacier activity has become more and more necessary for economical and security reasons and as an indicator of the local effects of global climate change. Remote sensing data provide useful information on such complex geophysical objects, but they require specific processing tech- niques to cope with the difficult context of moving and changing features in high-relief areas. This paper presents the first results of a project involving four laboratories developing and combining specific methods to extract information from optical and synthetic aperture radar (SAR) data. Two different information sources are processed, namely: 1) airborne photography and 2) spaceborne C-band SAR interferometry. The difficulties and limitations of their processing in the context of Alpine glaciers are discussed and illustrated on two glaciers located in the Mont-Blanc area. The results obtained by aerial triangulation techniques provide digital terrain models with an accuracy that is better than 30 cm, which is compatible with the computation of volume balance and useful for precise georeferencing and slope measurement updating. The results obtained by SAR differential interferometry using European Remote Sensing Satellite images show that it is possible to measure temperate glacier surface velocity fields from October to April in one-day interferograms with approximately 20-m ground sampling. This allows to derive ice surface strain rate fields required to model the glacier flow. These different measurements are complementary to results obtained during the summer from satellite optical data and ground measurements that are available only in few accessible points.
|
Titre |
en
Combining airborne photographs and spaceborne SAR data to monitor temperate glaciers. Potentials and limits
|
Auteur(s) |
Emmanuel Trouvé
1
, Gabriel Vasile
2
, Michel Gay
1, 3
, Lionel Bombrun
1
, Pierre Grussenmeyer
4
, Tania Landes
4
, Philippe Bolon
2
, Ivan Petillot
2
, Jean-Marie Nicolas
5
, Andreea Julea
2
, Jocelyn Chanussot
1
, Mathieu Koehl
4
, Lionel Valet
2
1
GIPSA-SIGMAPHY -
GIPSA - Signal Images Physique
( 388744 )
- GIPSA-lab, 11 rue des Mathématiques, Grenoble Campus BP46, F-38402 SAINT MARTIN D'HERES CEDEX
- France
2
LISTIC -
Laboratoire d'Informatique, Systèmes, Traitement de l'Information et de la Connaissance
( 7118 )
- BP 80439 74944 ANNECY LE VIEUX Cedex
- France
3
GIPSA-Services -
GIPSA-Services
( 408880 )
- GIPSA-lab, 11 rue des Mathématiques, Grenoble Campus BP46, F-38402 SAINT MARTIN D'HERES CEDEX
- France
4
MAP -
Modèles et simulation pour l'architecture, l'urbanisme et le paysage
( 516 )
- France
5
LTSI -
Laboratoire Traitement du Signal et de l'Image
( 3179 )
- Campus de Beaulieu, 263 Avenue du Général Leclerc - CS 74205 - 35042 Rennes Cedex
- France
|
Page/Identifiant |
905-924
|
Numéro |
4
|
Volume |
45
|
Vulgarisation |
Non
|
Comité de lecture |
Oui
|
Audience |
Internationale
|
Date de publication |
2007-04
|
Langue du document |
Anglais
|
Nom de la revue |
|
Domaine(s) |
|
Référence interne |
|
Mots-clés |
en
synthetic aperture radar (InSAR) interferometry, velocity field., temper- ate glacier, velocity field, Airborne photogrammetry, digital terrain model (DTM)
|
DOI | 10.1109/TGRS.2006.890554 |
Origine :
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