The configuration in which the Doppler radar beams are both forward and backward looking is called as?(a) Janus(b) Dual(c) Redundant(d) Wide beamI have been asked this question by my school principal while I was bunking the class.This interesting question is from Doppler Radar topic in division Celestial Navigation, Doppler and Altimeter Radars of Avionics

The configuration in which the Doppler radar beams are both forward an

1.	The configuration in which the Doppler radar beams are both forward and backward looking is called as?(a) Janus(b) Dual(c) Redundant(d) Wide beamI have been asked this question by my school principal while I was bunking the class.This interesting question is from Doppler Radar topic in division Celestial Navigation, Doppler and Altimeter Radars of Avionics
Answer» Right option is (a) JANUS To elaborate: Since the three orthogonal components of velocity are of interest, a minimum of three noncoplanar BEAMS are required to measure the three components. Since such a beam configuration has both forward and rearward looking beams it is CALLED Janus configuration, NAMED after the roman GOD who has the ability to look backward as well as forward.

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