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National Guard Members Continue LA Wildfire Response
January 21, 2025
— LOS ANGELES – U.S. Army Sgt. Ricardo Hernandez watched from a cross street as sporadic traffic...
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— CHANNEL ISLANDS AIR NATIONAL GUARD STATION, Calif. - Amid the wildfire crisis in California, an Air...
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January 14, 2025
— CHANNEL ISLANDS AIR NATIONAL GUARD STATION, Calif. – The National Guard is part of a multi-agency...
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January 13, 2025
— CHEYENNE, Wyo. – Three Wyoming Air National Guard C-130s equipped with the U.S. Forest Service’s...
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January 10, 2025
— MOFFETT AIR NATIONAL GUARD BASE, Calif. - Hundreds of National Guard members are now involved in...
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Pioneers in Seabed Imaging: NSWC PCD's Dr. Julius Hagemann and the SHADOWGRAPH Sonar
Naval Surface Warfare Center Panama City Division
Sept. 28, 2022 | 25:47
Dr. Dan Sternlicht, Naval Surface Warfare Center Panama City Division (NSWC PCD) Distinguished Scientist for Littoral Sensing Technologies, briefs his “Pioneers in Seabed Imaging: NSWC PCD’s Dr. Julius Hagemann and the SHADOWGRAPH Sonar” presentation, Sept. 28.
The SHADOWGRAPH system evolved from a 1954 proposal by Dr. Julius Hagemann for a fixed-beam, side-looking, high-resolution sonar to be carried in a towed vehicle that flew 15 feet above the ocean bottom. This is the first known example of sidescan sonar technology, which would modernize mine hunting and revolutionize our understanding of the ocean depths.
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