Radar System Engineering

SEC.317] NA VIGA TIO.V 109
Airborne radar is best used as a supplement to standard navigational
methods, rather than as a substitute for them. Overland navigation by
the traditional dead-reckoning procedure can be based upon determinations
of ground speed and drift angle made by the radar operator through
measurements of the motion of ground targets, while the position of the
N
FIG.334.-Boston, Mass. Detailed resolutionof land-waterboundariespermitsdirect
comparisonwith conventionalmaps. Wavelength = 1,25cm, 0.8° beam, altitude 4000ft,
~adi”s5 na”tiral rni. 42”21’?J,71°03’~V.
aircraft is checked at intervals against a map by the identification of
radar landmarks along the route.
The characteristics of the radar system must be kept in mind when
flights are planned. Each radar set has its limitations in range and
resolution. The maximum range is limited by many factors, 1 including
the transmitted power, the receiver sensitivity, and the antenna gain.
] See Chap. 2.