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]
|
|
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 |
Simple
- Date ( Publication )
- 2015-11-20
- Edition
- Purpose
- Provide ASAR-Envisat deformation maps and associated time series for the Valle d’Aosta region test site. Carry out a critical analysis of the possibility of using space-borne DInSAR techniques to obtain multi-decadal time series of ground deformations for landslide areas, to be correlated with meteorological and climatic variables.
- Status
- Completed
Author
Author
- Maintenance and update frequency
- As needed
- Keywords ( Theme )
-
- NEXTDATA
- Keywords ( Theme )
-
- HAMMER project , Landslide , DInSAR analysis , ASAR-Envisat satellite
- Keywords ( Place )
-
- Valle d'Aosta Region , Northwest Italy
- Keywords ( Theme )
-
- CNR IRPI
- Keywords ( Theme )
-
- CNR IREA
- Access constraints
- Intellectual property rights
- Use constraints
- Intellectual property rights
- Other constraints
- Spatial representation type
- Vector
- Metadata language
- English
- Character set
- UTF8
- Topic category
-
- Geoscientific information
- Time period
- 20022010
))
- Supplemental Information
- You can customize the template to suit your needs. You can add and remove fields and fill out default information (e.g. contact details). Fields you can not change in the default view may be accessible in the more comprehensive (and more complex) advanced view. You can even use the XML editor to create custom structures, but they have to be validated by the system, so know what you do :-)
- Reference system identifier
- WGS 1984
- Protocol
- WWW:LINK-1.0-http--link
- Name
- Description
- OnLine resource
- https://geoportal.mountaingenius.org/geonetwork/srv/en/resources.get?uuid=c52d745f-586e-4d31-9da9-ddc2b411aee5&fname=&access=private
- Protocol
- OGC:WMS-1.1.1-http-get-map
- Name
- Description
- Hierarchy level
- Dataset
- Statement
gmd:MD_Metadata
- File identifier
- c52d745f-586e-4d31-9da9-ddc2b411aee5 XML
- Metadata language
- English
- Character set
- UTF8
- Parent identifier
- ee14a6a6-7e17-4eea-8cca-d50ff94f5a9c
- Date stamp
- 2017-05-12T16:02:17
- Metadata standard name
- ISO 19115:2003/19139
- Metadata standard version
- 1.0
Point of contact
Point of contact
Overviews
Provided by
