Application of the Procedure. This procedure applies to medical appointments for all employees entitled to sick leave, the employee’s significant other and children and may be extended to other family members as determined by the Human Resources Manager. Policy Section:Facilities & Equipment
Application of the Procedure. ERS and ENVISAT IPTA processing was applied in the St. Moritz test area using SAR data of ascending (26 ERS scenes between 1992.05.16 and 2000.10.10 respectively 36 ENVISAT scenes between 2002.10.15 and 2010.09.28) and descending (41 ERS scenes between 1992.06.04 and 2000.10.29 respectively 35 ENVISAT scenes between 2004.05.16 and 2010.10.17) orbits. Only summer images acquired between May and October were considered because of the presence of snow-cover. As a first step, all ERS and ENVISAT SLCs were co-registered to the same ERS reference SLC of the corresponding orbit geometry.
Application of the Procedure. The multi-scale and multi-sensor SBAS analysis has been carried out by processing both descending and ascending SAR datasets relevant to the Umbria region, (Italy). In particular, the descending dataset is composed of 116 (77 ERS-1/2 and 39 ENVISAT) images and covers the April 1992-September 2010 time interval, while the ascending dataset includes 87 (36 ERS-1/2 and 51 ENVISAT) images spanning from June 1995- September 2010. As results of the regional scale SBAS analysis, low resolution deformation velocity maps and associated time series from both datasets have been produced, allowing the detection of several natural and human induced phenomena occurring in the study area. Figure 2 reports the low resolution deformation velocity map obtained by processing the descending dataset, superimposed on an amplitude SAR image of the analysed area. Such deformation velocity map reveals an overall stability of the area in the observed time interval. However, significant deformation patterns are present in the Xxxxx Umbra, where a subsidence induced by water exploitation occurs, and in the area around Perugia. We point out that the portion of Xxxxx Umbra between Assisi and Foligno has been affected by subsidence since 1992 (Figure 2c), as already shown by Xxxxxxxx et al. (2009), while the Perugia area exhibits ground deformation only since 2000. This is clearly visible in the plot reported in Figure 2b, thus demonstrating the effectiveness of the multi-scale SBAS approach to analyse and monitor large time intervals (almost 20 years) deformation phenomena, characterized by a temporal evolution of displacements that significantly deviate from a linear trend.
(a) Geocoded mean deformation velocity map at low spatial resolution scale (pixel size ≈ 100 m x 100 m) of the whole study area, obtained from descending SAR data, and superimposed on the amplitude SAR image. Deformation values are measured along the satellite Line of Sight (LOS).
(b) Deformation time series relevant to the pixel labelled as (b) in figure 2(a) is shown. Black and red triangles represent ERS and ENVISAT acquisitions, respectively.
(c) Same as (b) but referred to the pixel labelled as (c) in figure 2(a).
Figure 3. Mean deformation velocity maps relevant to the horizontal (E-W) and vertical displacement components (top), obtained by combining descending and ascending SAR data, and superimposed on the amplitude SAR image. Deformation time-series (bottom) relevant to a measure point (see red circle), lo...
Application of the Procedure. ERS-ENVISAT Stitching (Merging) analysis of the area (275 km2) led to the identification of 26842 total measurement points (MP), with a point density of 97 PS/ km2. Figure 5 shows the distribution of the MPs identified compared with single ERS and ENVISAT results. The distribution of MP within the study area is homogeneous with ERS and ENVISAT results. As far as velocity field is concerned the ‘merging velocity’ corresponds generally to the average of ERS and Envisat separate velocity fields. Examples of time series are reported in Figure 6.
Application of the Procedure. Altamira has done the PSInSAR processing of the C-band satellite images for the Hungarian test sites in the framework of international cooperation of XXXXX.
1). The spatial distribution of the scatterers (PS) was good in most cases (4.6 - 87.1 PS/km2), especially if we consider that the measurements have been performed on the most problematic areas regarding the method (rarely built-up areas, steep and variable surface, vegetation cover). Test area Size of test area (km2) Satellite / Band Track dir. Coh. min. Number of PS Average density of PS (PS/km2) Start date End date № of images Average observation interval (day) Rácalmás 513 ERS / C desc. 0,35 24634 48,0 1992.11.24 2000.12.01 56 53 ENVISAT / C desc. 0,35 26853 52,3 2002.11.01 2010.09.10 35 84 Dunaszekcső 153 ERS / C desc. 0,29 2015 13,2 1992.11.24 2000.12.01 54 56 ENVISAT / C desc. 0,37 1917 12,6 2002.11.01 2010.09.10 35 84 Hollóháza 941 ERS / C desc. 0,33 9454 10,0 1992.05.11 2000.11.09 60 53 ENVISAT / C desc. 0,5 4308 4,6 2002.11.14 2007.02.01 22 107
Application of the Procedure. Due to the strong non linear displacement occurred in the temporal gap between ERS and ENVISAT, the ERS-ENVISAT Stitching (Merging) analysis has not been performed for the Silesian coal Basin area data. Below, the ERS and ENVISAT deformation velocity maps are reported (Figs. 10 and 11).
Application of the Procedure. Tramuntana range has been monitored using ERS-1/2 and ENVISAT data stacks in descending orbit. The Figure 12 shows a long time series obtained by joining deformation data from ERS-1/2 and ENVISAT results. The final time series covers the timeframe from 1992 to 2009. 10,00 0,00 -100,070/05/1990 -20,00 -30,00 -40,00 -50,00 -60,00 -70,00 -80,00 -90,00 -100,00 31/01/1993 28/10/1995 24/07/1998 19/04/2001 14/01/2004 10/10/2006 06/07/2009 01/04/2012 ERS ENVISAT ERS 1992-2000 (descending orbit) ENVISAT 2003-2009 (descending orbit)
Application of the Procedure. This procedure applies to medical appointments for all employees entitled to sick leave, the employee's significant other and children and may be extended to other family members as determined by the Human Resources Manager. Policy Section: Facilities and Equipment Policy Name: Temporary Closing of It is the policy of the Keewatin-Xxxxxxxx District School Board that in compliance with the Education Act its schools will remain open during the whole period of the school year. However, the Board recognizes that there may be emergency situations which will dictate a partial or total closing or early dismissal of a school or a group of schools, in order to ensure the safety and comfort of students and staff. The safety and welfare of our students is of prime concern. The Board authorizes the closure of schools in emergency situations in accordance with the guidelines as set out below.
Application of the Procedure. In the post-event, since March 10th 2010, the DRPC in collaboration with the Department of Earth Sciences of the University of Xxxxxxxx, installed a GB-InSAR. The system employed was designed and implemented by Ellegi-LiSAlab s.r.l. and JRC and installed on a stable support, in Sanguinera, that is located on the slope facing the San Fratello landslide, at an average distance of 3.3 km (Figure 4). Figure 4 - GB-InSAR position and its field of view. Monthly cumulative deformation maps were made through the interferometric radar data and the displacement time series of some representative points of the landslide were extracted and analyzed. An example of interferogram obtained during this campaign is shown in Figure 5. The colour of each pixel represents the LoS (line of sight) component of the displacement (Figure 6). Figure 5 - Example of a displacement map of the studied area. The interferogram in Figure 5 represents the displacements along the LoS, since monitoring (March 10th 2010) to May 31st 2011. It shows the presence of principal movements concentrated in defined areas, in the upper part of the slope. On the interferogram some representative points are displayed; the displacement time series of these points, obtained using the GB-InSAR data, are shown in Figure 6. Figure 6 - Displacement time series of ten representative points of the landslide area. The displacements were also studied by the analysis of data obtained through satellite interferometry (PS-InSAR). Especially the ENVISAT and RADARSAT-2 data stacks in descending and ascending orbits, and the COSMO-SkyMed in descending orbit were analyzed. The ENVISAT satellite, provided by ESA space agency, works in C band with a repeat cycle of 35 days (Xxxxxxxxxxx et al., 2005). The analyzed images regard data acquired between November 22nd 2003 and May 20th 2009. Because of the acquisition mode and the exposition of the instable slope, the best information about displacement is obtained from data stacks in ascending orbits. In Figure 6 the ENVISAT data, acquired in ascending orbit and elaborated with PS- InSAR technique, are shown. The RADARSAT-2 satellite, provided by Geospacial Services International, works in C band with a repeat cycle of 24 days (Xxxxxxx et al., 2007). The analyzed images regard data acquired between December 30th 2005 and January 26th 2010. The RADARSAT-2 data, acquired in ascending orbit and elaborated with PS-InSAR technique, are shown in Figure 8. The areas marked in red in 8 ...
Application of the Procedure. The integration of multi-temporal and multi-SAR data has allowed us to detect and monitor different ground surface displacements and their temporal variations associated to each of the slope movements present in the El Portalet landslide complex (Fig.
