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ELECTRONICS |
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| in the interval. If the measured
interval between transmission and reception is 100 microseconds, the range
of the target is 9.3 miles. The maximum interval which can be accommodated
is the interval between pulses, or about 240 micro-seconds. Consequently,
the maxi-mum detection distance, as determined by the pulse interval, is
0.093 x 240 = 22 miles. Sufficient power in the transmitter and sensitivity
in the receivers are provided to produce a discernible echo from an aircraft
at this distance.
The azimuth and elevation angles are measured by noting the angles at which the receiving arrays are pointed with respect to true north and the ground plane as the target is observed. In the SCR-268 two directive receiving aerials are provided, the azimuth and elevation arrays. The reception pattern of the azimuth array is a fan-shaped figure with a long vertical axis. The pattern of the elevation array is similar, but rotated through 90 degrees, that is, the long axis is horizontal. The target information gathered |
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