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Project Diana marked the birth of radar astronomy later used to map Venus and other nearby planets, and was a necessary precursor to the US space program. It was the first demonstration that terrestrial radio signals could penetrate the ionosphere, [1] opening the possibility of radio communications beyond the Earth for space probes and human ...
While the facility soon evolved to become the third largest radio observatory in the world, some radar astronomy continued. The largest (250-ft or 76-m in diameter) of their three fully steerable radio telescopes became operational just in time to radar track Sputnik 1, the first artificial satellite, in October 1957. [97]
Night-time visual detection of a bomber was good to about 300 m and the existing Chain Home systems simply did not have the accuracy needed to get the fighters that close. Bowen decided that an airborne radar should not exceed 90 kg (200 lb) in weight or 8 ft³ (230 L) in volume and should require no more than 500 watts of power. To reduce the ...
The circuit of a coherer receiver, that recorded the received code on a Morse paper tape recorder. Unlike modern AM radio stations that transmit a continuous radio frequency, whose amplitude (power) is modulated by an audio signal, the first radio transmitters transmitted information by wireless telegraphy (radiotelegraphy), the transmitter was turned on and off (on-off keying) to produce ...
Space-time adaptive processing (STAP) is a signal processing technique most commonly used in radar systems. It involves adaptive array processing algorithms to aid in target detection. Radar signal processing benefits from STAP in areas where interference is a problem (i.e. ground clutter , jamming , etc.).
V1 Gen2 Radar Detector. A massive upgrade from the first-gen Valentine, the V1 Gen2 features an all-new magnesium case. This patented radar-seeking engine is adapted from a concept used by ...
The first public demonstration of the Telemobiloscope was in the courtyard of the Dom Hotel in Cologne on 17 May 1904. The metal gate to the courtyard was the target, and the transmission path was through a curtain – showing that the apparatus could work when the target could not be seen.
Radar astronomy is a technique of observing nearby astronomical objects by reflecting radio waves or microwaves off target objects and analyzing their reflections. Radar astronomy differs from radio astronomy in that the latter is a passive observation (i.e., receiving only) and the former an active one (transmitting and receiving).