Geophysical instruments measure the physical attributes of the Earth, and these measurements are collected for use by the UNAVCO science community.
GPS/GNSS Receivers (GPS, GLONASS, etc) collect GNSS data which, after processing, is used to measure millimeter-level surface motion measurements at specific points over a period of time; the datasets include temporary, episodic campaign surveys and permanent installations.
Geodetic Imaging uses data from radar or optical laser which, after processing, is used to measure centimeter-scale motions on the Earth's surface over several square meters to hundreds of square kilometers.
Laser Strainmeters are long-baseline (on the order of 0.5 km) measurements of deformation on the Earth's surface.
Borehole instrumentation is grouted in place 100 to 200 m below the surface to operate at the low noise levels required to capture small, short term transients. The instrumentation in the borehole casing can include:
Meteorological Systems can be co-located with other geodetic instruments to provide near-surface atmospheric measurements.
Tide Gauge Systems can be co-located with other geodetic instruments to provide sea level measurements.
Last modified: Wednesday, 25-Nov-2015 23:39:20 UTC