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training course on weather radar systems - RTC, Regional Training ...

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MODULE A- INTRODUCTION TO RADAR<br />

4.1. M<strong>on</strong>ostatic Radars<br />

M<strong>on</strong>ostatic <strong>radar</strong>s use a comm<strong>on</strong> or adjacent antennas for transmissi<strong>on</strong> and recepti<strong>on</strong>, where the<br />

<strong>radar</strong>s receiving antenna is in relati<strong>on</strong>ship to its transmitting antenna. Most <strong>radar</strong> system are use<br />

a single antenna for both transmitting and receiving; the received signal must come back to the<br />

same place it left in order to be received. This kind of <strong>radar</strong> is a m<strong>on</strong>ostatic <strong>radar</strong>. Doppler<br />

<strong>weather</strong> <strong>radar</strong>s are m<strong>on</strong>ostatic <strong>radar</strong>s.<br />

4.2. Bistatic Radars<br />

A bistatic <strong>radar</strong> has two antennas. Sometimes these are side by side, but sometimes the<br />

transmitter and its antenna at <strong>on</strong>e locati<strong>on</strong> and the receiver and its antenna at another. In this kind<br />

of <strong>radar</strong> the transmitting <strong>radar</strong> system aims at a particular place in the sky where a cloud or other<br />

target is located. The signal from this point is scattered or reradiated in many directi<strong>on</strong>s, much of<br />

being in a generally forward directi<strong>on</strong>. Such receiving <strong>systems</strong> may also be called passive <strong>radar</strong><br />

<strong>systems</strong>.<br />

4.3. Air Surveillance Radars (ASR)<br />

TURKEY RADAR TRAINING 1.0 / ALANYA 2005 35

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