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Topic: Millimeter Cloud Radar

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	Learn more about Radar in the online encyclopedia. (Site not responding. Last check: 2007-11-02)
		Radar waves reflect in a variety of ways depending on the size of the radio wave and the shape of the target.
		Early radars used very long wavelengths that were larger than the targets and received a vague signal, whereas modern systems use shorter wavelengths (a few centimetres) that can image objects the size of a loaf of bread or larger.
		This means that a radar has a distinct minimum range, which is the length of the pulse divided by the speed of light, divided by two.
	www.onlineencyclopedia.org /r/ra/radar.html (4547 words)

	Radar - Open Encyclopedia (Site not responding. Last check: 2007-11-02)
		The disadvantage of CW radar and SARH weapons is that the launch aircraft must continue to point its radar (and thus its nose) at the target for the entire duration of the missile's flight, leaving the attacker vulnerable to a counterattack.
		Other mathematical developments in radar signal processing include time-frequency analysis (Weyl Heisenberg or wavelet), as well as the chirplet transform which makes use of the fact that radar returns from moving targets typically "chirp" (change their frequency as a function of time, as does the sound of a bird or bat).
		The Freya radar was in fact much more sophisticated than its CH counterpart, and by operating in the 1.2 m wavelength (as opposed to ten times that for the CH) the Freya was able to be much smaller and yet offer better resolution.
	open-encyclopedia.com /Radar (5823 words)

	Radar Article, Radar Information (Site not responding. Last check: 2007-11-02)
		Early radars used very long wavelengths that were larger than the targets and received a vague signal, whereas modern systems use shorter wavelengths (a few centimetres) that can image objectsthe size of a loaf of bread or larger.
		This means that a radar has a distinct minimum range,which is the length of the pulse divided by the speed of light, divided by two.
		Other mathematical developments in radar signal processing include time-frequency analysis (Weyl Heisenberg or wavelet), aswell as the chirplet transform which makes use of the fact that radar returns from movingtargets typically "chirp" (change their frequency as a function of time, as does the sound of a bird or bat).
	www.anoca.org /radars/radio/radar.html (5169 words)

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