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지진과 화산 폭발은 비극적인 결과를 가져오는 극단의 자연 현상입니다.
유정의 실패(Oil well Failure), 광산 붕괴, 가스 파이프 폭발/누출,
산사태 등의 갑작스런 발생은 많은 희생자와 상상을 초월하는 많은 재산
손실을 초래합니다. 이러한 비극적인 사건들은 종종 잘 감지되지 않는
미세한(밀리미터 혹은 센티미터 정도의) 움직임에 의해 진행됩니다.
이러한 미세한 움직임의 영향이 축적되어 결국 재앙을 불러옵니다.
이러한 재앙을 방지하는 것이 어떤 경우에는 불가능할지 모릅니다.
그러나 그러한 위험 지역이 어딘지 미리 알림으로써 많은 피해와 재난을
방지할 수 도 있을 것입니다.
EarthView InSAR는 전세계에 걸쳐 미세한 지구의 움직임을 빠르고
정확하게 포착할 수 있도록 중요한 정보를 여러분에게 제공합니다. EarthView
InSAR는 가장 많이 사용되는 Interferometry 소프트웨어로 다음과 같은
기능들을 제공합니다.
◎ 주요 기능
- Digital Elevation Models (accuracy: 10 m Radarsat fine beam,
20 meters ERS)
- Vertical height change (subsidence and absidence)
- Horizontal height change
- Seismic deformation due to earthquakes
- Volcano monitoring
- Land dynamics such as landslides and erosion
- Glacier motion and ice sheet mapping
- Land use classification using coherence
◎ Features List
■ Supports tandem and repeat pass space-borne
DEM generation; DEM generation using an external DEM; and 2-, 3-
and 4- pass differential interferometry
■ DEM creation for mapping applications in
Telecommunications, Hydro, Oil/Gas exploration, Pipeline planning,
Aircraft early warning systems
■ Differential interferometry for two-dimensional
mapping of large-scale surface deformation with applications in
oil and gas extraction, slope stability assessment, mining, and
seismic deformation (earthquakes, volcanoes, crustal motion)
■ Data ingest -
ERS-1, ERS-2, JERS-1, ENVISAT, RADARSAT-1 and ALOS JAXA. Single data scenes
or data strips can be processed
■ Supports CDPF, ESA-ESRIN, and Atlantis/CCRS
SAR processors’ Single Look Complex (SLC) data formats.
■ User-friendly graphical user interface (GUI)
provides step by step operation with context sensitive help.
■ User-selectable intermediate and final output
products.
■ Image display capability provided by OpenEV.
■ Automatic ingest of Delft University DEOS
precision ERS-1 and ERS-2 orbits of 10cm accuracy or better. The
precision orbit data can be downloaded at no cost from the WWW.
Accurate baseline estimation is facilitated by refined orbital information.
■ Phase unwrapping uses an Atlantis patented
Iterative Disk Masking (IDM) algorithm with controlled error propagation
and error correction. Uses multiple tiling and seeding techniques.
■ Automatic masking of low coherence areas,
automatic connection of residues. An unwrapping control mask image
is generated for use by the interactive unwrapping tool.
■ Re-engineered output products tool including
an enhanced image listing and visualization.
■ Optional baseline decorrelation and azimuth
spectral overlap filtering.
■ Automatic co-registration bias correction.
This is necessary for automatic detection and correction of large
errors between predicted and true co-registration of the two SAR
images in an InSAR pair. Large errors in azimuth can defeat automatic
co-registration. This facility completes a large-area search to
detect and correct any bias that may be present (up to a maximum
of 2048 pixels).
■ Automatic co-registration is accomplished
via tie-point prediction based on geometric modeling, and is refined
using correlation techniques.
■ Interferogram enhancement filtering with
optional use of phase slope information (phase slope data is very
important for correct enhancement on steep terrain). Data re-sampling
is applied to reduce the amount of data to be phase unwrapped and
give square dimensioned pixels in ground range.
■ The capability to harness multiple CPU’s
to enhance throughput.
EarthView-InSAR
Hardware Requirements
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Platform
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Operating System
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Recommended Hardware
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PC
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Windows NT 4.0 (with service pack 6 or later), Windows 2000
Professionall,
Windows XP Professional, Windows VISTA
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Dual CPU, 256 MB RAM, 8 GB free disk space, 2 GB
swap space, accelerated 3D video card*
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Notes:
It is necessary to use a high bandwidth colour monitor
and graphics card combination capable of supporting
at least 16-bit or 24-bit colour depth. Best performance
is obtained when the graphics card is both hardware
accelerated and OpenGL capable.
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