INDEX 



atmospheric noise, 395; see also noise 



ATR tubes, duplexing and, 568 



attack diagram, 64 



attack display, 654-655 



attack doctrine, fire-control system and, 

 120-123 



attack phase system logic, 117-118 



attenuation, 175, 227-230, 391; precipi- 

 tation and, 230-231, 767; by propel- 

 lant gases, 231-233 



attenuators, meteorological, 761-762, 

 767 



A-type presentation, 613-614 



aural indicator, in display system 

 design, 676-677 



autocorrelation, defined, 305 



autocorrelation function, 247-259, 288 



automatic angle tracking, 474 



automatic frequency control (AFC), 

 350-352, 394, 401-402; in air-weather 

 radar, 770; continuous-correction 

 type, 407-411; design of, 542; in- 

 stantaneous, 415-416; limit-activated, 

 412-413 



automatic gain control (AGC), 265, 

 379-380, 394, 416-428 



automatic space stabilization system, 

 395 



automatic tracking, general problems of, 

 471-474 



automatic tracking circuits, 471-510; 

 accuracy requirements in, 479-480; 

 angle tracking and, 480-489; design 

 considerations, 508-510; external in- 

 puts to, 475-479; general problem of, 

 471-474; range and velocity tracking 

 and, 498-510; range tracking design 

 example, 505-508; servo system trans- 

 fer function, 502-504; tracking loop 

 design, 485-486; tracking loop net- 

 work and amplifier, 496-497 



Axelby, George S., 446 n., 458 n., 467 n., 

 471 n. 



Axford, W. E., 233 n. 



back-scattering, 10, 174 

 back-scattering coefficient, 760-761, 766 

 back-scattering cross section, 176 

 back-up coverage, 74 

 backward wave oscillator, 602 

 Bacon, R. H., 735 n. 

 balance point, 303 



807 



bandpass characteristic, pulsed doppler 

 system, 331-332 



bandpass detection filters, 167 



bandwidth, angular resolution and, 333; 

 angular scanning and, 319; automatic 

 tracking and, 474; carrier frequency 

 and, 260; detection minimum, 299; 

 discriminator design and, 415; dy- 

 namic response of receiver and, 375- 

 376; filter, 327, 335; gain product, 

 365-367; of IF amplifier, 365; of infra- 

 red sensing systems, 799; in intensity- 

 modulated display, 618, 633; of Janus 

 and non-Janus systems, 750-751; 

 noise and, 260, 268, 285; predetection 

 and postdetection and, 167-168; ra- 

 dome design and, 533; scan modula- 

 tion and, 290; in tracking-loop design, 

 485; transmitted, 295; voltage reflec- 

 tor and, 543; wide, 336-338 



bandwidth capability, 543-545 



Barnes, J. F., 242 n. 



Barnett, E. F., 555 n. 



battle-control system, 53, 66; see also 

 fire-control system 



beacon system, 11-12 



beam attacks, accuracy requirements 

 for, 125-129 



beam deflection, cathode ray tube, 624- 

 625 



beam power pattern, ground mapping, 

 774-780 



beam-shaping tubes, 671-673 



beam splitting, 96 



beam-type amplifiers, 599-601; see also 

 klystron; magnetron 



beamwidth, 151; accuracy of, 80-82; 

 angle noise and, 207; angular resolu- 

 tion and, 169, 333; antenna pattern 

 and, 143; cathode ray tube and, 632; 

 defined, 170, 515; detection probabili- 

 ty and, 156; efi^ective, 173; ground 

 mapping and, 774; height-finding 

 system and, 95; scanning and, 159- 

 160; sea return and, 212; tactical 

 problem and, 89-92; velocity bias 

 error and, 748; vertical, 91-92 



beating frequency, 361 



Bessel function, 169, 261, 521-522 



Bessemer, C. W., 634 n. 



bias errors, angle tracking loop, 489- 

 490; automatic tracking, 479; 



