. Airborne radar. Airplanes; Guided missiles. 476 AUTOMATIC TRACKING CIRCUITS. 30 P^ ZI^ ~^ V^ s ?0 _ \l-lx^, uj 10 - ^^ 4 \ \X\ g 0 — Ijj ^ e -10 -20 1 1 1 1 1 1 Mill 1 1 1 1 20,000 20,000 16,000 12,000 RANGE (yards) 20,000 16,000 12,000 RANGE (yards) __ / - -<^ - ^^^^^ ~l 1 1 1 1 II \ 1 <^ i 1 i 0 2 _ ^ — r». i^^ ^ ^ =:=^ 4>' \fy 1 1 1 1 1 1 1 1 1 1 1 1 1 1 16,000 12,000 RANGE (yards) 4000 ^ 20,000 Fig. 9-1 Lead-Pursuit Course Inputs. 16,000 12,000 RANGE (yards) 4000 teristics of the motion which are used to establish angle tracking loop specifications as described
. Airborne radar. Airplanes; Guided missiles. 476 AUTOMATIC TRACKING CIRCUITS. 30 P^ ZI^ ~^ V^ s ?0 _ \l-lx^, uj 10 - ^^ 4 \ \X\ g 0 — Ijj ^ e -10 -20 1 1 1 1 1 1 Mill 1 1 1 1 20,000 20,000 16,000 12,000 RANGE (yards) 20,000 16,000 12,000 RANGE (yards) __ / - -<^ - ^^^^^ ~l 1 1 1 1 II \ 1 <^ i 1 i 0 2 _ ^ — r». i^^ ^ ^ =:=^ 4>' \fy 1 1 1 1 1 1 1 1 1 1 1 1 1 1 16,000 12,000 RANGE (yards) 4000 ^ 20,000 Fig. 9-1 Lead-Pursuit Course Inputs. 16,000 12,000 RANGE (yards) 4000 teristics of the motion which are used to establish angle tracking loop specifications as described in Paragraph 9-6. Table 9-1 TYPICAL MAXIMUM ANGULAR RATES AND ACCELERATIONS OF THE SIGHT LINE CO mils/sec co mils/sec^ Lead Pursuit (Horizontal Target Maneuvers) 46 Lead Collision Course" "At time of firing, 10 seconds to go. (Much more severe at short ranges; see Fig. 2-45.) Fig. 9-1 also shows plots of the lead angle and lead angle rate to illustrate how the antenna must be moved with respect to the antenna platform. Space platform disturbances are not included here, but curves such as these help define the necessary antenna gimbal motion and actuator capabilities. Figs. 9-1 and 2-45 are typical of the plots needed to define the angle track inputs, and in practice many others would be made during studies of various attack conditions to determine the most severe operating requirements. Signal Fades. At long ranges, signal returns from a target are of extremely low power and may be detected only periodically. This variation, of random nature, is referred to as/at^ifiii;. Fading is not a desirable input,. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Povejsil, Donald J. Princeton, N. J. , Van Nostrand
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Keywords: ., bookcentury1900, bookcollectionbiodiversit, booksubjectairplanes
