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Collecting and Analyzing Geospatial Information
ALOS ALOS-2 TerraSAR-X Services Pleiades SPOT-5 SPOT6 & 7 WorldView-1 WorldView-2 WorldView-3 GeoEye-1
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Aerial photogrammetric surveying Aerial laser surveying Thermal sensor surveying Hyperspectral Sensor Surveying PALS (Portable Aerialphotography and Locator System)
Vehicle/Ground Surveying
Road condition laser surveying Road condition surveying GPS surveying TS surveying Precision surveying Terrestrial Laser Surveying Ground based InSAR and Radar
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Utilizing Geospatial Information
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Shoken Taisho

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PasCAL for LGWAN Our Town Guide Facilities Booking System
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Disaster prevention plans and hazard maps Road and bridge design Water supply and sewage facility management Dam and Port Management Rivers and erosion control Ubiquitous Consulting

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Sale of high-precision aerial photographs Aerial photographs of Okinawa Prefecture Satellite images Mapping data for GIS 3D Map Data 3D Elevation Data

Ground based InSAR and Radar

To date, PASCO has developed measuring technologies and built up a wealth of experience in the analysis of images obtained by synthetic aperture radar (SAR) satellites, disaster prevention consultancy, and the maintenance and management of social infrastructure facilities such as bridges. Utilizing this knowhow and experience, PASCO provides services through its ground based InSAR and ground based radar, which are able to capture extremely small changes.

Advantages of ground based InSAR, and areas of application

Measuring ground surface variation of mines
(The above figure uses separate digital elevation data.)

On a ground based InSAR (IBIS-FL), the transmission antenna moves along a rail while sending out radar waves toward the target range. The receiver antenna then records the reflected waves that are sent back from the target object. The two-dimensional measuring feature on synthetic aperture radar (SAR) enables the measurement of surface displacement. As it is possible to take constant measurements through the automatic operation feature, ground based InSAR can be harnessed for the monitoring of steady slope collapses, and for the monitoring of large-scale structures such as dams.

Advantages in comparison with conventional technology

  • Remote surveying up to 4km
  • High-precision detection of relative displacement to the degree of 1/10mm
  • Real-time monitoring of wide-area targets (several km2)
  • Automatic operations
  • Able to carry out measurement in all weather conditions, in both day and night

Areas of application

  • Capturing relative displacement for places where landslides have occurred
  • Capturing surface conditions, such as for the erosion of volcanic edifices
  • Measuring extremely small displacements for structures that are long and wide, such as dams etc.

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Advantages of ground based radar, and areas of application

Ground based radar (IBIS-FS) transmits radar waves from its transmission antenna, records reflected waves sent back from the target object using its receiver antenna, and extracts information on the degree of variation based on the degree of phase displacement.

Advantages in comparison with conventional technology

  • Remote measurement up to 1km
  • High-precision detection of relative displacement to the degree of 1/10mm
  • Quick installation and implementation of measurement activities
  • Sampling of frequency for structures up to 100Hz

Areas of application

  • Analyzing changes in structures and risks of collapse
  • Measuring resonant frequencies of structures such as bridges
  • Capturing fixed frequencies of structures etc.

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