sector scan


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sector scan

[′sek·tər ‚skan]
(electronics)
A radar scan through a limited angle, as distinguished from complete rotation.

sector scan

sector scan
Sector scan.
sector scanclick for a larger image
Sectional aeronautical charts.
sector scan
A scan pattern in which the radar beam is made to rotate in the horizontal plane about the transmitter through a selected angle. This pattern is used in fire control, airborne interception, and the precision approach radars.
sector search
i. A method of searching for a ground target in a given sector. This method is used when the area of search is restricted. If the area is bigger, the creeping-line-ahead search method is used for the outer zone, whereas the sector search is used for the inner zone. The method involves flying along a radial and returning to base along a slightly different radial. The distance between the two radials, at the farthest place, is determined by the sweep width.
ii. Searching for an aerial target in a given sector. The radar aerial in this case looks and transmits within the given sector.
References in periodicals archive ?
The 9S19M2 Imbir radar set is designed for sector scan, with its main function being TBM warning.
The radar has limited autonomous-operation capability, with a range of about S0-60 km and a sector scan of 120 degrees in azimuth and 6-7 degrees in elevation.
The radar makes use of Doppler processing while its MTI facility features automatic target tracking and sector scan.
As shown in Figure 1, the sector scan differs from the circular scan in that the antenna moves back and forth across a segment of angle.
RF complex types are deemed to be less-than-desirable donors (unless some predictable pattern exists with which the receiver can be synchronised) as are emitters performing sector scans. BBDS further believes that the approach offers a high degree of resistance to countermeasures with its ability to derive a useable plot even when the donor emitter is subjected to noise jamming.