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Instrumentation Help with Instrumentation Geophysical Instruments GNSS/GPS Geodetic Imaging SAR Satellites TLS Laser Strainmeters Borehole Instrumentation Borehole Strainmeters Borehole Seismometers Borehole Pore Pressure Sensors Borehole Tiltmeters Meteorological Systems Tide Gauge Systems
Geodetic Imaging

Geodetic imaging uses electromagnetic waves at radar and optical laser frequencies to quantify centimeter-scale motions at the Earth’s surface from on the order of a square meter to hundreds of square kilometers.

Synthetic Apeture Radar (SAR)

Synthetic Apeture Radar (SAR) sensors acquire amplitude and phase datasets for the same location at different times allowing for interferometric SAR (InSAR) showing relative ground displacements between the two datasets along the direction of the radar beam. Currently, UNAVCO curates datasets for select SAR satellites.

SAR Instrument Resolution Application
SAR Satellites 1 - 20 m wide-area deformation, frequent repeat
Airborne SAR ~1 m broad area, planned surveys
Ground-based SAR ~1 m focused area, continuous or planned surveys

Laser Scanning Instrumentation

Laser scanning (lidar) instruments have a range of capabilities in terms of measurement range, sample rate, laser wavelength, laser spot size, physical size, weight, and power efficiency. UNAVCO maintains a pool of Terrestrial Laser Scanning (TLS) instruments that are available for Earth science research and has helped with regional geodetic surveys using Airborne Laser Scanning (ALS).

Lidar Instrument Resolution Application
TLS 1 - 10 cm focused area, continuous or planned surveys
ALS 20 cm broad area, planned surveys

For more information about lidar systems, including spaceborne and high-altitude, please see the UNAVCO Knowledge Base on Comparison of Lidar Systems.

Last modified: Friday, 01-Apr-2016 23:53:52 UTC

 

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