Recommendation and Future Work
1. Introduction
Centre of Volcanology and Geological azard Mitigation CVGM ndonesia recorded of tectonic activities of Mt. Bromo, their recorded tectonic activity dominated by continuing tremor vibration with maksimum amplitude which tend to fluctuate. Mount Bromo status is now siaga level of . Potential to evoke freatik eruptions and magmatic materials, distribution materials such as ash plumes and pyroclastis fall will occur around Corresponding author. Tel.: 8 ‐8 ‐ 88 E ‐mail address: arbadiis.u‐tokyo.ac.jp 4 0 the volcano. Mount Bromo is located in East Java Province, one of the most active volcanoes in ndonesia which short eruptions cycle among year to years. The objective of this study is to support disaster assessment due to volcanic activities regarding to deformations caused eruptions in and by using time series nSAR interferometric SAR in year cycles of mount Bromo. The most commonly rapid technique of assessment is used remote sensing method Lu et al., , remote sensing has been largely implemented to rapid assess damages assessment e.g Voigt et al, after aiti earthquake in . Long time observations are needed to learn risk and vulnerability assessments to understand and possibly mitigate the impact of such catastrophic events on human beings and their environment.2. Methodology
Mount Bromo is located in East Java Province, one of the most active volcanoes in ndonesia which short eruptions cycle among year to years. Synthetic aperture radar SAR is a technique that allows highresolution radar images to be formed from data acquired by sidelooking radar instruments carried by aircraft or spacecraft Curlander and McDonough., . The amplitude of a SAR image can be interpreted in terms of the scattering properties of the Earths surface . 2.1 Data Processing For analyzing the deformation events in to late we used SAR data derived from ALOSPALSAR and another observations from to the early of we used SAR data derived from ALOS Palsar‐ mages which L‐band frequency characteristic onboard from Advanced Land Observing Satellite ALOS with active microwave sensor. Table below show detalis data are used for this study. Table 1. Data information Date Sensor Processing Type Polarization Orbit 8 8 ALOSPalsar ALOSPalsar ALOSPalsar ALOSPalsar ALOSPalsar ALOSPalsar ALOS Palsar ALOS Palsar L. . L. . L. . L. . L. . L. . L. . L. . Descending Descending Descending Descending Descending Descending Descending Descending PALSAR‐ is L‐band frequency active microwave remote sensing which characterize enable to penetrate cloud cloud‐free and day‐and‐night observation. mages below are used for interferometric SAR Processing. The synthetic aperture radar signal processing could be implemented simply as follow below. 2.2 Flow Chart n this research we proposed time series nSAR method in the conventional single‐ interferogram approach, derives from two radar images of the same area acquired at different times to measure ground displacement. The technique uses the phase difference of backscattered signals from the two acquisitions to measure differential motion in the Line Of Sight LOS direction include vertical and horizontal components.Parts
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