Valle d'Aosta Region Envisat deformation measurements
Relatively to the Valle d’Aosta region test site, a space-borne analysis, using the DInSAR technique, was done using the ESA’s Grid Processing On-Demand (G-POD) service.
The ASAR-Envisat dataset, available through the Virtual Archive 4 of ESA (by the Category-1A project, part of the ESA Geohazard Supersites initiative), was processed by using the G-POD service. The SAR dataset, made of 38 images acquired from ascending orbit (track 301) between June 2004 and November 2010, has been analyzed with the SBAS-DInSAR technique.
The ASAR-Envisat satellite acquires images characterized by:
- Band acquisition: C Band
- Wavelength (cm): 5.6
- Incident angle (°): 23°
- Azimuth/ground range resolution (m): ≈ 4/20
- Revisit time (days): 35
- Life status: 2002 – 2010
- Space agency: ESA
Regarding the G-POD threshold setting of the SBAS processing, the following parameters were used:
- Max Perpendicular Baseline (m): 400
- Max Temporal Baseline (days): 1500
- Ground Pixel Dimension (m): 40
- Coherence Threshold: 0.8
- Area of Interest (AOI): entire frame
- REF point: Lat. 45.737049 – Lon. 7.31899
The achieved SBAS measurements are provided in geocoded coordinates (Lat./Lon. and UTM WGS84), and are reported in an ASCII file.
The SBAS results, relevant to the entire frame (normally around 100x100 km), have an accuracy of 1 mm/yr concerning the mean velocity measurements, and 5 mm for the deformation measurements [Casu et al., 2006]
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Citation proposal
Martina Cignetti (Italian National Research Council (CNR)) - Andrea Manconi (Italian National Research Council (CNR)) (2015) . Valle d'Aosta Region Envisat deformation measurements. https://geoportal.mountaingenius.org/geonetwork/srv/api/records/c52d745f-586e-4d31-9da9-ddc2b411aee5 |
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- c52d745f-586e-4d31-9da9-ddc2b411aee5 XML
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- WWW:LINK-1.0-http--link
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- WWW:DOWNLOAD-1.0-http--download
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- OGC:WMS-1.1.1-http-get-map
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- English
- Spatial representation type
- Vector
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- WGS 1984
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- NEXTDATA
- Keywords ( Theme )
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- HAMMER project , Landslide , DInSAR analysis , ASAR-Envisat satellite
- Keywords ( Place )
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- Valle d'Aosta Region , Northwest Italy
- Keywords ( Theme )
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- CNR IRPI
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- CNR IREA
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))
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- Date ( Publication )
- 2015-11-20
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- Italian National Research Council (CNR)
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- Italian National Research Council (CNR)
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- Italian National Research Council (CNR)
- Organisation name
- Italian National Research Council (CNR)
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- Italian National Reserach Council (CNR)
- manunta.m@irea.cnr.it
- Organisation name
- Italian National Reserach Council (CNR)
- Date stamp
- 2017-05-12T16:02:17
- Metadata language
- English
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- UTF8
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