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The launch of Sentinel-1 constellation raise a new era for InSAR applications and time series analysis. The wide coverage, fine temporal and spatial resolution, precise control of orbits and the free distribution policy bring more new chances than ever to earth observations applications. In this experiment we use Sentinel-1A data that covers a period of one year and a half (from November 2014 to June...
Comparing with its former C-band fellows ERS and Envisat, Sentinel data is favored for its short revisit days (12 days) and free distribution policy. Moreover, TOPS mode can cover a much larger monitoring area (250 km in azimuth) while maintaining a relative high range/ azimuth resolution (4m*20m in general). The advantages of TOPS mode made it become the default mode for Sentinel-1. This paper describes...
This brief study introduces a partially working concept being developed at IT4Innovations supercomputer (HPC) facility. This concept consists of several modules that form a whole body of an efficient system for observation of terrain or objects displacements using satellite SAR interferometry (InSAR). A metadata database helps to locate data stored in various storages and to perform basic analyzes...
In the state of Indiana over 1500 million tons of coal were extracted from underground in the past 150 years. As a consequence, today many of the long-abandoned mines pose a serious risk to the local. When the abandoned mine shafts collapse, the ground above can drop as much as several feet along with everything on it. Thus it is essential for a long-term-wide-range monitoring technique to map the...
The persistent scatterers (PS) technique is a powerful remote sensing technology that exploits a long series of synthetic aperture radar data for monitoring ground deformations with millimeter accuracy on a high spatial density of ground targets. One of the major limitations of this technique is due to atmospheric effects, and in particular to high Water Vapor (WV) variability. As a consequence, to...
Change detection is an application to which SAR is particularly well suited since SARs can consistently produce high quality fine resolution imagery from multiple repeat pass collections. The aim of this paper is to extract all possible information from SAR-InSAR data and to asses to which extent this information can be exploited for change detection purposes in Hong Kong. We collaborate with Planning...
TerraSAR X-band (TSX) data can provide a high resolution of 1m, short revisit period of 11 days, and sensitive ground subsidence information. Permanent Scatterers (PS) technology was developed as a powerful tool for extracting the ground displacement information from TSX images. In this work, we exploit the potential of TSX for monitoring ground subsiding for the urban area in Hong Kong. A total of...
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