810 



display systems, amplitude-modulated, 

 613-615; combination, 619; control 

 loop and, 611; design problems of, 

 607-677; ground mapping and, 781- 

 782; input information types, 619- 

 621; types of, 613 



divergence factor, 191 



doppler equation, 729 



doppler effect, 6, 15; discrimination by, 

 10 



doppler filter, 167, 324, 331 



doppler frequency, 26, 181; FM devia- 

 tion from, 314; noise and, 270 



doppler navigation systems, 725-759; 

 accuracy in, 734-736; "altitude hole" 

 and, 752-754; basic principles, 728- 

 833; coherency in, 738; computations 

 possible in, 745-746; errors caused by 

 interaction with ground and water, 

 746-749; flight test results of, 755-759; 

 forms of, 733-736; frequency trackers 

 in, 742-743; heading reference in, 746; 

 low-altitude performance of, 752-754; 

 major characteristics and components 

 of, 736-746; navigation computer and, 

 744-746; performance data for, 755- 

 759; polarization used in, 738-739; 

 radar range equation and, 749-752; 

 stabilization of, 741-742; transmission 

 frequency of, 738; transmission types, 

 736-738; see also pulsed doppler sys- 

 tems 



doppler radar systems, 22, 162-168, 293, 

 742; clutter problem and, 227; de- 

 scribed, in -11%; design of, 280; sea 

 return in, 217-219; target motion 

 and, 180-181; see also doppler effect; 

 doppler navigation system 



doppler shift, 22, 26, 166, 308, 729, 731 



doppler signal-to-noise ratio, 750 



doppler spectrum, 217 



doppler techniques, use of, 317 



Dorr, R., 663-664 



double-ring strapping, magnetron an- 

 ode, 583 



Dougherty, J. P., 502 n. 



Douglas sea state, 747-748 



drift, 394; antenna, 462 



drift angle, doppler navigation system, 

 743-744 



drift errors, ground mapping, 776 



Dunn, J. H., 395 n., 422 n., 479 n. 



INDEX 



duplexed-active operation, 317 

 duplexing problem, 566-573; doppler 



navigation system and, 753 

 dynamic lag, automatic tracking, 479 

 dynamic lag errors, 124 

 dynamic system, 2, 41 



early warning detection and interception 

 vectoring, 52; see also airborne early 

 warning (AEW) 



earth-flattening procedure, 233 



earth's curvature, effect of, 190-191 



East, T. W. R., 230 n. 



echo, radar, 174-175; multiple-time- 

 around, 220-221 



echoing area, 176 



eclipsing, 162-166; in pulsed doppler 

 systems, 328-329 



ECM, see electronic countermeasures 



Ektron cell, 346 



electrical-to-light transducers, 627-634 



electrochemical corrosion, 709 



electroluminescence, in display system 

 design, 665-671 



electromagnetic radiations, 2, 35-36; see 

 also radio waves 



electron beam, focussing of, 658-659 



electronic equipment, airborne, see air- 

 borne electronic equipment; cooling 

 of, 687-688 



electron gun, 622-624; storage tubes 

 and, 656 



electronic countermeasures (ECM), 2, 

 55-56 



electronic environment, 35-36 



electron motion, magnetrons and, 580- 

 582 



electrostatic storage, 310 



elevated duct, 235 



elevation coverage, 114 



Emerson, W. H., 566 n. 



endurance limit, stress and, 701 



enemy target, detection of, 5; see also 

 target 



energy density spectrum, 240 



energy transfer function, 242 



envelope detector, 382-385 



environment, effects of on human opera- 

 tion, 644-645; launching zone parame- 

 ters and, 120; natural vs. induced, 681 



environmental factors, 35-36; frequency 

 deviations and, 402-403; mechanical 



