RADAR is an electromagnetic system for the detection and location of target objects such as aircraft, ships, spacecraft, vehicles, people, and the natural environment which can … Built-in navigation computers (CR-3 and E6B). <>

The Radar Range Equation - the radar range equation relates the range of the radar to the characteristics of the transmitter, receiver, antenna, target and the environment.

Make private notes for specific questions.

Let us now discuss the principle of radar.Radar is used for detecting the objects and finding their location. We can understand the As shown in the figure, Radar mainly consists of a transmitter and a receiver. Discuss specific questions with other students through comments.

The two way distance between the Radar and target will be 2R, since the distance between the Radar and the target is R.Radar signals should be transmitted at every clock pulse. endstream x��ْ$�q%��?�z�F�$b�yHAJVf���n��62#s�ݥu��y~� ��^?f�� ,�Ъ��~ xc �G�� `K�m��rB��� �"�����%����� ���tz�d� �����x

If we select a shorter duration between the two clock pulses, then the echo signal corresponding to present clock pulse will be received after the next clock pulse. M�������!9��D�g?� f�z��c)P�����,�7q�� Due to this, the range of the target seems to be smaller than the actual range.So, we have to select the duration between the two clock pulses in such a way that the echo signal corresponding to present clock pulse will be received before the next clock pulse starts. Book 1 “Radar Basics” (Revision from 20.12.2009) This educational endowment is a printable summary of the first chapter of the internet representation “Radar Basics”, containing a lecture on the principles of radar technology. endobj Search for specific keywords in questions and answers. The signal, which is reflected back towards the Antenna gets received by the Following are the basic terms, which are useful in this tutorial.Now, let us discuss about these basic terms one by one.Let the time taken for the signal to travel from Radar to target and back to Radar be ‘T’.

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The time interval between the successive clock pulses is called Therefore, pulse repetition frequency is nothing but the frequency at which Radar transmits the signal.We know that Radar signals should be transmitted at every clock pulse. Please Note : This List Is Not The Final … The function of the Target reflects this received signal in various directions.

Note: unmodulated CW waveforms do not permit the measurement of range.

Lecture notes; Course Description. %���� <> 14. A typical As shown in the figure, Radar transmits a periodic signal. It is having a series of narrow rectangular shaped pulses. (b) A pulsed radar operating at 10 GHz has an antenna with a gain of 28dB and a transmitter of 2 KW (pulse power). The officer on watch must be able to maneuver the ship in any conditions: adverse weather and sea conditions, high-density traffic areas.

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Mark questions for later review or set various question flags. Then, we will get the true range of the target and it is also called maximum unambiguous range of the target or simply, From Equation 2, we will get the pulse repetition time, $T_P$ as the reciprocal of pulse repetition frequency, $f_P$. 1193 0 obj The duration between the two clock pulses should be properly chosen in such a way that the echo signal corresponding to present clock pulse should be received before the next clock pulse.

2 0 obj $$R_{un}=\frac{C\left ( \frac{1}{f_P} \right )}{2}$$We can use either Equation 3 or Equation 5 for calculating maximum unambiguous range of the target.We will get the value of maximum unambiguous range of the target, $R_{un}$ by substituting the values of $C$ and $T_P$ in Equation 3.Similarly, we will get the value of maximum unambiguous range of the target, $R_{un}$ by substituting the values of $C$ and $f_P$ in Equation 5.Substitute, $R=R_{min}$ and $T=\tau$ in Equation 1.We will get the value of minimum range of the target, $R_{min}$ by substituting the values of $C$ and $\tau$ in Equation 6.

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