Salar de Atacama Envisat deformation measurements
Relatively to the Salar de Atacama test site, a space-born 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 18 images acquired in ascending orbit (track 282) between March 2003 and September 2009, 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 (°C): 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 SABS processing, the following parameters were used:
- Max Perpendicular Baseline (m): 400
- Max Temporal Baseline (days): 1500
- Ground Pixel Dimension (m): 80
- Coherence Threshold: 0.8
- Area of Interest (AOI): entire frame
- REF point: Lat. 23.773739 – Lon. 67.936905
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 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
(2015) . Salar de Atacama Envisat deformation measurements. Italian National Research Council (CNR) https://geoportal.mountaingenius.org/geonetwork/srv/api/records/aa0f56c8-1a92-47dc-a77e-321fe1990cb6 |
Simple
- Date ( Publication )
- 2015-11-20
- Edition
- Purpose
- Provide ASAR-Envisat deformation maps and associated time series for the Salar de Atacama 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
Publisher
- Maintenance and update frequency
- As needed
- Keywords ( Theme )
-
- NEXTDATA
- Keywords ( Theme )
-
- HAMMER project , Salar , DInSAR analysis , Mean velocity map
- Keywords ( Place )
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- Atacama Desert , Antofagasta region , Cile
- 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
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- Reference system identifier
- WGS 1984
- Protocol
- Name
- Description
- OnLine resource
-
View in Google Earth
View in Google Earth
- OnLine resource
-
gn:ATCAMA_SAR_Envisat_Asce_wgs84
Show geographic position
- Hierarchy level
- Dataset
- Statement
gmd:MD_Metadata
- File identifier
- aa0f56c8-1a92-47dc-a77e-321fe1990cb6 XML
- Metadata language
- English
- Character set
- UTF8
- Parent identifier
- 676c61d3-69ea-48ac-a73f-83582ca6da19
- Date stamp
- 2017-05-12T16:05:43
- Metadata standard name
- ISO 19115:2003/19139
- Metadata standard version
- 1.0
Point of contact
Point of contact
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