12.02.2014 Views

Radar System Engineering

Radar System Engineering

Radar System Engineering

SHOW MORE
SHOW LESS

You also want an ePaper? Increase the reach of your titles

YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.

212 THE GATHERING AND PRESENTATION OF RADAR DATA [SEC. 615<br />

tracking on aircraft targets by means of rapid scanning. The inherent<br />

dMiculty of the problem is displayed by the fact that the GCA really<br />

consists of three separate radar equipments. One is a PPI set which<br />

presents a general picture of the air traffic situation; the other two, which<br />

comprise the precision system, have “ beavertail” beams narrow respectively<br />

in azimuth and in elevation. Each of these is rapidly scanned in<br />

its narrow dimension, and separate indicators of the “stretched PPI”<br />

type present the two angular coordinates. The set is fully described in<br />

Sec. 8“13 of Vol. 2 of this series.

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!