Weather radar
... create a “duct” whereby radio waves are bent substantially more than in the standard atmosphere. B shows the most common duct-producing situation. Situations C and D are less common. ...
... create a “duct” whereby radio waves are bent substantially more than in the standard atmosphere. B shows the most common duct-producing situation. Situations C and D are less common. ...
Chapter 3.
... 2. An AM wave displayed on an oscilloscope has values of Vmax=4.8 V and Vmni=2.5 V as read from the graticule. What is the percentage of modulation? 5. The maximum peak-to-peak value of an AM wave is 45 V. The peak-to-peak value of modulating signal is 20 V. What is the percentage of modulation? 6. ...
... 2. An AM wave displayed on an oscilloscope has values of Vmax=4.8 V and Vmni=2.5 V as read from the graticule. What is the percentage of modulation? 5. The maximum peak-to-peak value of an AM wave is 45 V. The peak-to-peak value of modulating signal is 20 V. What is the percentage of modulation? 6. ...
Continuous-wave radar
Continuous-wave radar is a type of radar system where a known stable frequency continuous-wave radio energy is transmitted and then received from any reflecting objects. Continuous-wave (CW) radar uses Doppler, which renders the radar immune to interference from large stationary objects and slow moving clutter.CW radar systems are used at both ends of the range spectrum. Inexpensive radio-altimeters, proximity sensors and sport accessories that operate from a few dozen feet to several kilometers Costly early-warning CW angle track (CWAT) radar operating beyond 100 km for use with surface-to-air missile systems↑ ↑