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NEXRAD

The Next Generation Weather Radar, which is the current network of Doppler radar stations operated by the National Weather Service, the Federal Aviation Administration, and the Department of Defense.

Phased Array Radar

An advanced type of radar that uses a large number of small antennas working together to electronically steer radar beams, allowing for faster and more flexible scanning of the atmosphere compared to traditional radars that mechanically rotate.

Testbed

A controlled environment or facility used for testing new technologies, systems, or scientific theories under real-world conditions or simulations, before widespread deployment.

Under Secretary

Refers to the Under Secretary of Commerce for Oceans and Atmosphere, who also serves as the Administrator of the National Oceanic and Atmospheric Administration (NOAA).

Gap Radar Coverage

Areas where the existing weather radar system has limited or no ability to detect weather phenomena, often due to terrain blocking signals or distance from radar stations.

Data Assimilation Technologies

Methods and tools used to combine observations (like radar data) with numerical weather prediction models to produce the most accurate possible representation of the current state of the atmosphere.