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Editor's Note: This page is a summary of news about Helene for Friday, Sept. 27. For the latest on the storm, see our story for Saturday, Sept. 28. ST. MARKS, Fla. – Helene weakened to a post ...
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A Doppler radar is a specialized radar that uses the Doppler effect to produce velocity data about objects at a distance. [1] It does this by bouncing a microwave signal off a desired target and analyzing how the object's motion has altered the frequency of the returned signal.
The Lump Gulch Fire was a wildfire that burned in Jefferson County in the state of Montana in the United States. The fire, which was first reported on June 13, 2020, was started by a downed power line. It burned in the Lewis and Clark National Forest, Helena National Forest, and on state and private land. As of June 23, the fire had burned ...
Pulse-Doppler radar for aircraft detection has two modes. Scan; Track; Scan mode involves frequency filtering, amplitude thresholding, and ambiguity resolution. Once a reflection has been detected and resolved, the pulse-Doppler radar automatically transitions to tracking mode for the volume of space surrounding the track.
Wildfire burns 150+ acres NE of Helena. Wildfire burns 150+ acres NE of Helena. Skip to main content. Sign in. Mail. 24/7 Help. For premium support please call: 800-290-4726 more ways to reach us ...
The fire burned 21,846 acres (88 km 2), and destroyed 72 homes. The fire merged with the nearby Fork Fire (3,484 acres (14 km 2)). The Helena Fire was fully extinguished on November 15, after spreading over 21,846 acres (88 km 2). [1] The cause of the fire was a tree falling on a Trinity Public Utilities District power line.