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Relative to the Ivancich test site several space-borne data were available. In particular, the SAR data were generated in the framework of DORIS project (FP7) by CNR-IREA, and were published in: Calò et al. (2014) Enhanced landslide investigations through advanced DInSAR techniques: The Ivancich case study, Assisi, Italy. Remote Sensing of Environment, 142: 69-82. This dataset is a courtesy of Ing. Maceo Giovanni Angeli (IRPI-CNR) and Dr. Geol. Fabrizio Pontoni (private consultant). The COSMO SkyMED satellite acquires images characterized by: - Band acquisition: X Band - Wavelength (cm): 3.1 - Resolution azimuth/range (m): ≈ 2.5/2.5 – 0.1/0.1 - Revisit time (days): 11 - Incident angle (°): 20-60 - Life status:2007-2014 - Space agency: ASI The images used, processed by SBAS DInSAR technique at full-resolution scale (3 m x 3 m), include 39 images spanning from December 2009 to February 2012 in descending orbit, of the territory of Assisi, Monte Subasio and Valle Umbra. The SAR data reports 522966 SBAS targets in shapefile format provided in SBAS-InSAR geocoded coordinates (Lat./Lon. and UTM WGS84).
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Posted: May 15, 2017, 8:58 pm

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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Posted: May 12, 2017, 9:05 pm

The SAR ground deformation time series relevant to Valle d’Aosta region include deformation data obtained from ASAR-Envisat satellite acquisitions (images available in the framework of Category-1A project, part of the ESA Geohazard Supersites initiative), and elaborated by the ESA’s G-POD service with the SBAS technique. In particular, the analysis provided 23634 measure points, for the observed period from April 2004 to November 2010. The analysis provided for each SBAS targets: - East and North UTM WGS84 coordinates (m); - Temporal interferometric coherence [CohT]; - Deformation velocity (cm/year) [Vel.]; - Azimuth and Range coordinates [Az./Rg.]; - Latitude and Longitude coordinates (deg.) [Lat./Lon]; - Topography (m) [RT]; - Deformation Data (cm), related to the acquisition dates of the exploited SAR images. The dataset of the exploited images are expressed as: [year+((month-1)*30+day)/365]. 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] The deformation time series present a monthly temporal sampling, and provide long time series of deformation, allowing to follow the evolution of surface displacements over time.
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Posted: May 12, 2017, 9:05 pm

Relatively to the Grange Orgiera test site, a space-born analysis, using the DInSAR technique, was done using the ESA’s Grid Processing On-Demand (G-POD) service, for the entire frame considered. 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 21 images acquired in ascending orbit (track 301) between April 2005 and October 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): 80 - Coherence Threshold: 0.7 - Area of Interest (AOI): entire frame - REF point: Lat. 44.5838 – Lon. 7.1434 The achieved SBAS measurements 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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Posted: May 12, 2017, 9:04 pm

The SAR ground deformation time series relevant to Sampeyre frame include deformation data obtained from ASAR-Envisat satellite acquisitions (images available in the framework of Category-1A project, part of the ESA Geohazard Supersites initiative), and elaborated by the ESA’s G-POD service with the SBAS technique. In particular, the analysis provided 65535 measure points, for the observed period from April 2005 to October 2010, relative to the entire frame. The archive provide for each SBAS targets: - ID: Gr1; Gr2; Gr n - East and North UTM WGS84 coordinates (m); - Temporal interferometric coherence [CohT]; - Deformation velocity (cm/year) [Vel]; - Azimuth and Range coordinates [Az/Rg]; - Latitude and Longitude coordinates (deg) [Lat/Lon]; - Topography (m) [RT]; - Deformation Data (cm), related to the date of the exploited SAR images. The date of the exploited images are expressed as: [year+((month-1)*30+day)/365]. The SBAS results, relevant to the entire frame (normally around 100x100 km), have an accuracy of 1 mm/yr for mean velocity measurements, and 5 mm for the deformation measurements [Casu et al., 2006]. The deformation time series present a monthly temporal sampling, and provide long time series of deformation, allowing to follow the evolution of surface displacement over time.
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Posted: May 12, 2017, 9:03 pm

Relatively to the Grange Orgiera test site, a space-born analysis using the DInSAR technique, was done using the ESA’s Grid Processing On-Demand (G-POD) service, for a specific area of interest (AOI). 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 processes by using the G-POD service. The SAR dataset, made of 21 images acquired in ascending orbit (track 301) between April 2005 and October 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): 80 - Coherence Threshold: 0.7 - Area of Interest (AOI): selected AOI close to the test site - REF point: Lat. 44.5838 – Lon. 7.1434 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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Posted: May 12, 2017, 9:03 pm