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Identification, friend or foe ( IFF) is a combat identification system designed for command and control. It uses a transponder that listens for an interrogation signal and then sends a response that identifies the broadcaster. IFF systems usually use radar frequencies, but other electromagnetic frequencies, radio or infrared, may be used. [1]
Original air date. The Six Million Dollar Man. "The Moon and the Desert". Richard Irving. Martin Caidin & Henri Simoun. March 7, 1973. ( 1973-03-07) Steve Austin is an astronaut who has made three Moon landings. In a test flight accident caused by a malfunctioning center stick, his right arm is severed, his left eye is blinded, and both legs ...
Active noise control ( ANC ), also known as noise cancellation ( NC ), or active noise reduction ( ANR ), is a method for reducing unwanted sound by the addition of a second sound specifically designed to cancel the first. The concept was first developed in the late 1930s; later developmental work that began in the 1950s eventually resulted in ...
WASHINGTON (Reuters) -The U.S. military will deploy additional fighter jets and Navy warships to the Middle East, the Pentagon said on Friday, as Washington seeks to bolster defenses following ...
While not an SI-unit, the litre may be used with SI units. It is equivalent to (10 cm) 3 = (1 dm) 3 = 10 −3 m 3. Many non-SI units continue to be used in the scientific, technical, and commercial literature. Some units are deeply embedded in history and culture, and their use has not been entirely replaced by their SI alternatives.
July 17, 2024 at 8:32 AM. Matt McClain/The Washington Post/Getty Images. Within 30 minutes of the shooting at Donald Trump’s Pennsylvania rally on Saturday, federal law enforcement used a ...
Lucifer is an American fantasy police procedural comedy-drama television series developed by Tom Kapinos that premiered on Fox on January 25, 2016. It features characters created by Neil Gaiman, Sam Kieth, and Mike Dringenberg taken from the comic book series The Sandman, which later became the protagonist of the spin-off comic book series Lucifer written by Mike Carey, both published by DC ...
Amateur teleprinting over radio (AMTOR) D-STAR (Digital Data) a high speed (128 kbit/s), data-only mode. Hellschreiber, also referred to as either Feld-Hell, or Hell a facsimile-based teleprinter. Discrete multi-tone modulation modes such as Multi Tone 63 (MT63) Multiple frequency-shift keying (MFSK) modes such as. FSK441, JT6M, JT65, and FT8.