Radar Principles Explained

This solution analyzes the truthfulness of two statements concerning radar technology.

Statement Analysis

• Statement A: The Radar pulse width is of the order of microseconds.
  • Radar pulses are short bursts of electromagnetic energy.
  • Their duration, or pulse width (denoted as $ \tau $), determines the radar's ability to distinguish closely spaced targets and influences range resolution.
  • Typical pulse widths range from nanoseconds ($ ns $) to milliseconds ($ ms $). Pulse widths of the order of microseconds ($ \mu s $) are common in many radar applications, including weather radar.
  • Therefore, Statement A is considered true.
• Statement B: The Doppler Weather Radar detects the shift in the phase of the pulse of energy.
  • Doppler weather radar operates by transmitting pulses and analyzing the reflected signals.
  • The motion of precipitation particles (like rain or hail) towards or away from the radar causes a change in the frequency of the reflected pulse, known as the Doppler effect.
  • This frequency shift is directly related to a change in the phase of the received signal from one pulse to the next.
  • By measuring this phase shift (or the resulting frequency shift), Doppler radar can determine the velocity of the precipitation.
  • Therefore, Statement B is considered true.

Conclusion

Since both Statement A and Statement B are true, the correct option is that both statements are true.