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].

 
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
 

INSPIRE

Identification

File identifier
aa0f56c8-1a92-47dc-a77e-321fe1990cb6   XML
Online resource
Protocol
Protocol
GLG:KML-2.0-http-get-map
Protocol
OGC:WMS-1.1.1-http-get-map
Resource identifier
Metadata language
English
Spatial representation type
Vector
Encoding
Projection
code
WGS 1984
 

Classification of data and services

Topic category
  • Geoscientific information
 

Classification of data and services

Coupled resource
Coupled resource
 
 

Classification of data and services

Coupled resource
Coupled resource
 
 

Keywords

Other keywords
Keywords ( Theme )
  • NEXTDATA
Keywords ( Theme )
  • HAMMER project , Salar , DInSAR analysis , Mean velocity map
Keywords ( Place )
  • Atacama Desert , Antofagasta region , Cile
Keywords ( Theme )
  • CNR IRPI
Keywords ( Theme )
  • CNR IREA
 
 

Geographic coverage

N
S
E
W


 

Temporal reference

Temporal extent
Temporal extent
Date ( Publication )
2015-11-20
 

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Lineage
 

Conformity

Conformity
Conformity
 

Conformity

Conformity
Conformity
 

Restrictions on access and use

Access constraints
 

Restrictions on access and use

 

Responsible organization (s)

Contact for the resource
Organisation name
Italian National Research Council (CNR)
Email
martina.cignetti@irpi.cnr.it
 

Responsible organization (s)

Contact for the resource
Organisation name
Italian National Research Council (CNR)
Email
martina.cignetti@irpi.cnr.it
 

Metadata information

Contact for the metadata
Organisation name
Italian National Research Council (CNR)
Email
manunta.m@irea.cnr.it
Organisation name
Italian National Research Council (CNR)
Email
francesca.ardizzone@irpi.cnr.it
Date stamp
2017-05-12T16:05:43
Metadata language
English
Character set
UTF8
 
 

SDS

Conformance class 1: invocable

Access Point URL
Endpoint URL
Technical specification
 

Conformance class 2: interoperable

Coordinate reference system
 
Quality of Service
 
Access constraints
Limitation
 
Use constraints
Limitation
 
Responsible custodian
Contact for the resource
 
 

Conformance class 3: harmonized

 
 

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