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  2. Ground-penetrating radar - Wikipedia

    en.wikipedia.org/wiki/Ground-penetrating_radar

    Ground-penetrating radar antennas are generally in contact with the ground for the strongest signal strength; however, GPR air-launched antennas can be used above the ground. Cross borehole GPR has developed within the field of hydrogeophysics to be a valuable means of assessing the presence and amount of soil water.

  3. Sonar - Wikipedia

    en.wikipedia.org/wiki/Sonar

    The LIMIS (limpet mine imaging sonar) is a hand-held or ROV-mounted imaging sonar for use by a diver. Its name is because it was designed for patrol divers (combat frogmen or clearance divers) to look for limpet mines in low visibility water. The LUIS (lensing underwater imaging system) is another imaging sonar for use by a diver.

  4. Synthetic-aperture radar - Wikipedia

    en.wikipedia.org/wiki/Synthetic-aperture_radar

    The pixel locations of the ground in the image is dependent on the satellite–ground geometry model. Grid-division is now done as per the azimuth time. Calculations for the "slant range" (range between the antenna's phase center and the point on the ground) are done for every azimuth time using coordinate transformations.

  5. Sonar image speculated to be Amelia Earhart’s long ... - AOL

    www.aol.com/sonar-image-speculated-amelia...

    Tony Romeo and his Deep Sea Vision team – which captured a sonar image of an aircraft-shaped object in the Pacific Ocean during a three-month expedition to find Earhart’s Lockheed 10-E Electra ...

  6. Explorers say they think they’ve found Amelia Earhart’s long ...

    www.aol.com/news/sonar-imagery-may-revealed...

    By using sonar imaging, a tool for mapping the ocean floor that uses sound waves to measure the distance from the seabed to the surface, the group has spotted an anomaly in the Pacific Ocean ...

  7. Imaging radar - Wikipedia

    en.wikipedia.org/wiki/Imaging_radar

    Imaging radar is an application of radar which is used to create two-dimensional images, typically of landscapes. Imaging radar provides its light to illuminate an area on the ground and take a picture at radio wavelengths. It uses an antenna and digital computer storage to record its images.

  8. This Man Knows the Truth About Amelia Earhart. Why Doesn’t ...

    www.aol.com/man-knows-truth-amelia-earhart...

    A new cohort of explorers is turning to advanced underwater sonar imaging technology in hopes of a breakthrough. One of the first to pioneer the tech was marine explorer Bob Ballard, who ...

  9. Side-scan sonar - Wikipedia

    en.wikipedia.org/wiki/Side-scan_sonar

    Side-scan sonar (also sometimes called side scan sonar, sidescan sonar, side imaging sonar, side-imaging sonar and bottom classification sonar) is a category of sonar system that is used to efficiently create an image of large areas of the sea floor.

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