05-12-2012, 04:59 PM
Introduction to RADAR
[attachment=42675]
What is RADAR
RADAR (Radio Detection And Ranging) is a way to detect and study far off targets by transmitting a radio pulse in the direction of the target and observing the reflection of the wave.
Invention of RADAR
German Christian Huelsmeyer was the first to discover the effect of radar in 1904, but radar as we know it was invented and the acronym established in 1935 by three British scientists, Sir Robert Watson-Watt, A F Wilkins and H E Wimperis along with Sir Henry Tizard discovered its use putting it to exellent effect in World War II.
Radar observables
Target range
Target angles (azimuth & elevation)
Target size (radar cross section)
Target speed (Doppler)
Target features (imaging)
Maximum unambiguous range
When ambiguity arises?
If the pulse repetition frequency is too high, echo signals from some targets might arrive after the transmission of next pulse, and ambiguities in measuring range might result.
[attachment=42675]
What is RADAR
RADAR (Radio Detection And Ranging) is a way to detect and study far off targets by transmitting a radio pulse in the direction of the target and observing the reflection of the wave.
Invention of RADAR
German Christian Huelsmeyer was the first to discover the effect of radar in 1904, but radar as we know it was invented and the acronym established in 1935 by three British scientists, Sir Robert Watson-Watt, A F Wilkins and H E Wimperis along with Sir Henry Tizard discovered its use putting it to exellent effect in World War II.
Radar observables
Target range
Target angles (azimuth & elevation)
Target size (radar cross section)
Target speed (Doppler)
Target features (imaging)
Maximum unambiguous range
When ambiguity arises?
If the pulse repetition frequency is too high, echo signals from some targets might arrive after the transmission of next pulse, and ambiguities in measuring range might result.