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AccuWeather 1 hour ago Major cross-country storm to spread snow, rain along 2,600-mile swath. The same storm responsible for breaking the dry streak in Southern California at the start of the week ...
Dwell time (T D) in surveillance radar is the time that an antenna beam spends on a target. [1] The dwell time of a 2D–search radar depends predominantly on the antenna's horizontal beam width θ AZ, and; the turn speed n of the antenna (in rotations per minute or rpm, i.e. 360 degrees in 60 seconds = multiplied by a factor of 6).
On November 22, 1987, WTTW's signal was hijacked by an unknown person wearing a Max Headroom mask—the second such signal interruption incident to occur in the Chicago area that night, with the first taking place during the 9 p.m. newscast on independent station WGN-TV (channel 9) two hours prior to the hacker's intrusion of the WTTW signal.
TPY-2 radar in travelling configuration View from the back on a deployed TPY-2 radar. The AN/TPY-2 Surveillance Transportable Radar, also called the Forward Based X-Band Transportable (FBX-T) is a long-range, very high-altitude active digital antenna array [1] [2] X band surveillance radar designed to add a tier to existing missile and air defence systems.
Arlington Heights Air Force Station was activated on 1 April 1960, when Williams Bay AFS was redesignated from P-31 to gap-filler RP-31F. In 1962, the station began providing Semi-Automatic Ground Environment radar tracks to Data Center DC-02 at Truax Field, Wisconsin, for the Chicago Air Defense Sector's ground-controlled interception. [5]
The Chicago "L" is a rapid transit system that serves the city of Chicago and seven of its surrounding suburbs. The system is operated by the Chicago Transit Authority (CTA). On an average weekday, 759,866 passengers ride the "L", [ 1 ] making it the second-busiest rapid transit system in the United States, behind the New York City Subway .
Interstate 490 (I-490), also known as the O'Hare West Bypass and Western O'Hare Beltway, is a six-mile (9.7 km) electronic toll highway and a beltway that is currently under construction near Chicago, Illinois; it will run along the west side of O'Hare International Airport. [1]
The Chicago "L" (short for "elevated") [4] is the rapid transit system serving the city of Chicago and some of its surrounding suburbs in the U.S. state of Illinois.Operated by the Chicago Transit Authority (CTA), it is the fourth-largest rapid transit system in the United States in terms of total route length, at 102.8 miles (165.4 km) long as of 2014, [1] [note 1] and the third-busiest rapid ...