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Continuous-wave radar (CW radar) is a type of radar system where a known stable frequency continuous wave radio energy is transmitted and then received from any reflecting objects. [1] Individual objects can be detected using the Doppler effect , which causes the received signal to have a different frequency from the transmitted signal ...
An islandwide power outage occurred on July 5 after gusty winds downed power lines, and the local weather radar was knocked out. Damage on the island was estimated at US$150,000. [99] September 11, 2018: Typhoon Mangkhut passed near Guam, causing about 80% of the island to lose electricity. [100]
Synthetic-aperture radar ( SAR) is a form of radar that is used to create two-dimensional images or three-dimensional reconstructions of objects, such as landscapes. [ 1] SAR uses the motion of the radar antenna over a target region to provide finer spatial resolution than conventional stationary beam-scanning radars.
The 2013 Moore tornado was a large and extremely violent EF5 tornado that ravaged Moore, Oklahoma, and adjacent areas on the afternoon of May 20, 2013, with peak winds estimated at 210 miles per hour (340 km/h), killing 24 people (plus two indirect fatalities) [2] and injuring 212 others. [3]
The Doppler effect (also Doppler shift) is the change in the frequency of a wave in relation to an observer who is moving relative to the source of the wave. [ 1][ 2][ 3] The Doppler effect is named after the physicist Christian Doppler, who described the phenomenon in 1842. A common example of Doppler shift is the change of pitch heard when a ...
New car prices fell 0.2% in July and 1.4% from the prior year. Compared to their peak in February 2022, prices paid for used vehicles are now down 19.4%. Used car prices rose more than 40% ...
Responsibility for the timing of the second bombing was delegated to Tibbets. Scheduled for 11 August, the raid was moved earlier by two days to avoid a five-day period of bad weather forecast to begin on 10 August. [189] Three bomb pre-assemblies had been transported to Tinian, labeled F-31, F-32, and F-33 on their exteriors.
At the conclusion of its fourth rate-setting policy meeting of 2024 on June 12, 2024, the Federal Reserve kept the federal funds target interest rate steady at a 23-year high of 5.25% to 5.50% ...