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Radar Lab


Faculty

Sarah Kruse (Director)     Tim Dixon

Radar image

Terrestrial Radar Interferometry (TRI) is a ground-based radar technique that uses both phase and amplitude information from a coherent radar signal to generate maps of terrain elevation and displacement (deformation). The system can be used to study landslides, slope stability on volcanoes, the stability of quarry walls, levees and bridges, and the motion of glaciers. USF's Radar Lab uses the Gamma system. This is a real-aperture radar that operates at a frequency of 17.2 GHz (Ku-band) and allows for displacement (range change) measurements in the line-of -site direction with millimeter precision. The device uses three slotted waveguide antennas (one transmit, two receive). Successive images formed by the transmitting and either one of the reception antennas can be used to generate range change information with 1 to 2 minute updates. Since the two receiving antennas have a small separation distance between them, the signals received at each one can also be interferometricly combined to generate DEMs (digital elevation models) with vertical precision of 1 to 2 meters, and horizontal resolution equivalent to the pixel size of the amplitude image, approximately 2 meters in range and 5 to 10 meters in azimuth. References


Radar image

Ground Penetrating Radar (GPR) is a ground-based radar technique that uses radar waves transmitted into the ground to map soil and rock stratigraphy and buried objects at depths ranging from centimeters to tens of meters. Transmitting and receiving antenna pairs are towed or pushed along the ground or water surfaces to produce 2D profiles and 3D data volume images of subsurface structure. USF Radar Lab has used GPR systems to study the explosive history of volcanos, the structure of volcanic flows, the geometry and hydrologic function of sinkholes, beach and shoreline evolution, the geological history of the Everglades, archeological sites, and the location of clandestine graves. Current projects include:

  • characterizing sandhill wetland hydrogeology  (Christine Downs)
  • full waveform inversion for pipes and the Chang'E3 lunar GPR data
        ( Sajad Jazayeri)
  • high resolution imaging of lava tubes  (Sanaz Esmaeili)
  • imaging ice volume in a cave  (Jackson Hubbard)
  • mapping fault structures in Crater Lake National Park

The Radar Lab runs an unshielded system from Sensors and Software, Inc. with 200, 100, and 50 MHz antennas (left), a shielded system from Mala Geoscience, Inc. with 800, 500, 250, and 100 MHz antennas (below), and laser and GPS-based positioning systems. References

Radar image
Radar image