1148:
642:
35:
213:
add-on unit, increasing the altitude to 65,000 feet (20 km). Installations began in 1956. New-build units from Bendix with this equipment pre-installed became the AN/FPS-20 in 1957. Otherwise similar units with an antenna from
General Electric were known as the AN/FPS-20B. The slotted-waveguide
217:
The FPS-20s were simple pulse-radar systems and subject to jamming using basic techniques. This led to a second series of upgrades to provide anti-jamming capabilities starting in 1959. Among these were the GPA-102 (MK-448) which turned an FPS-20 into an FPS-64 and a FPS-20A to an FPS-66, and the
205:(prf) and 2 microsecond pulse width. The antenna was driven at three fixed speeds of 3.3, 5 or 10 RPM, normally operating at 5. Many of the operating modules were mounted on the rotating platform, with the output signals fed via slip rings to amplifiers and displays at the base of the unit.
115:
377:. radomes.org disputes the link with the CPS-5, which had a somewhat different antenna as can be seen in the photographs in Winkler's work. This confusion may be due to the language in Bacque, which refers to "newly developed AN/FPS-3 long-range radar set".
208:
The FPS-3 was limited to about 55,000 feet (17 km) altitude, which was seen as a limitation in light of new jet-powered bombers known to be in development in the USSR. This led to the development of the
331:
The GPA-27 may be the slotted waveguide mounted on the top of the main antenna seen in images of the FPS-20. However, some images show this on radars labeled FPS-3, although this may be before they were
166:
in 1950, was upgraded to the FPS-20, then spawned over a dozen different variants as additional upgrades were applied. The FPS-20 formed the backbone of the US air defense network through the early
275:
and 100A. These systems were known as the "Blue Pearl", or Bendix Radar
Processor BRP-150. These were remanufactured units with a new antenna, and included a new low-noise front-end amplifier.
1719:
301:(JETDS), all U.S. military radar and tracking systems are assigned a unique identifying alphanumeric designation. The letters “AN” (for Army-Navy) are placed ahead of a three-letter code.
305:
The first letter of the three-letter code denotes the type of platform hosting the electronic device, where A=Aircraft, F=Fixed (land-based), S=Ship-mounted, and T=Ground transportable.
1699:
1239:
1634:
1524:
952:
937:
1544:
1389:
1744:
1514:
1789:
1429:
1199:
229:
A more major update was the MK-747, which added a new antenna from
Raytheon, the Diplex Gating Unit (DGU), a bandpass filter and other modifications, to produce the
907:
3701:
631:
3711:
189:
to control aircraft involved in the atomic bomb tests of early 1951. Over the next few years, 48 FPS-3s were installed to replace older systems in the
3378:
601:
218:
GPA-103 (MK-447) which turned a FPS-20 into an FPS-65 and the FPS-20A into an FPS-67. Similar upgrades using a
Canadian OA-4831 system produced the
3696:
170:
with over 200 units deployed. Most FPS-20 sites were replaced by modern equipment in the late 1960s, although a number were turned over to the
3691:
341:
Winkler refers to upgraded units as FPS-3B on page 76, but other sources agree with his own page 33 that these were actually called FPS-3A.
3067:
1027:
298:
292:
264:
based amplifier and a separate receiver for the
Airborne Instruments Laboratories system, producing the AN/FPS-20/20A JAPAN, or -J.
3051:
3046:
3041:
3031:
3026:
3021:
3006:
3001:
311:
The third letter indicates the function or purpose of the device, where G=Fire control, R=Receiving, S=Search, and T=Transmitting.
108:
AN/FPS-3, AN/MPS-7, AN/FPS-64, AN/FPS-65, AN/FPS-66, AN/FPS-67, AN/FPS-91, AN/FPS-93, AN/FPS-100, AN/FPS-113, AN/GPS-4, AN/FPS-508
3036:
3016:
3011:
2991:
1184:
624:
3072:
837:
2265:
1704:
1289:
1087:
802:
570:
350:
Winkler does not mention this directly, but notes on page 77 that -3A units were also renamed FPS-20 when receiving updates.
1314:
897:
526:
1709:
1194:
1042:
3103:
1714:
1594:
1012:
967:
922:
737:
717:
617:
2069:
1749:
1689:
1329:
1002:
927:
254:
3411:
3147:
2270:
2245:
1354:
972:
807:
2705:
2655:
2645:
2513:
1935:
1814:
1734:
1604:
1349:
1209:
1077:
1072:
1022:
2996:
2595:
2225:
2220:
2215:
2210:
2175:
1779:
1579:
1574:
1489:
1424:
1419:
1259:
1007:
987:
702:
697:
134:
2395:
2362:
2300:
2280:
2235:
1870:
1754:
1659:
1654:
1649:
1599:
1549:
1399:
1364:
762:
3113:
2718:
2695:
1920:
1804:
1799:
1769:
1739:
1589:
1569:
1499:
1479:
1454:
1434:
1414:
1324:
1319:
1284:
1264:
1229:
1214:
1103:
942:
682:
3706:
3157:
3137:
2650:
2570:
2332:
2295:
2255:
2240:
1794:
1784:
1684:
1674:
1669:
1539:
1509:
1504:
1494:
1444:
1359:
1294:
1234:
1052:
997:
977:
315:
Thus, the AN/FPS-20 represents the 20th design of an Army-Navy “Fixed, Radar, Search” electronic device.
3197:
3192:
2290:
2285:
2275:
2250:
2195:
2190:
1960:
1875:
1679:
1564:
1404:
1394:
1369:
1344:
1304:
1279:
1118:
827:
777:
202:
71:
3167:
3142:
3132:
2620:
2385:
2200:
2185:
2180:
2011:
2001:
1996:
1945:
1860:
1809:
1764:
1759:
1644:
1629:
1624:
1584:
1559:
1484:
1474:
1469:
1459:
1409:
1379:
1274:
1254:
1249:
1204:
1179:
1128:
962:
645:
451:
A high-resolution
Slotted-waveguide IFF antenna for the AN/FPS-3 radar by J.Y. Wong 1957 NRC Canada.
3269:
3264:
3259:
3202:
3162:
2983:
2978:
2973:
2968:
2953:
2948:
2943:
2938:
2933:
2923:
2918:
2913:
2908:
2903:
2710:
2230:
2205:
1965:
1829:
1774:
1619:
1609:
1529:
1519:
1384:
1374:
1339:
1334:
1309:
1224:
1219:
1189:
1082:
982:
892:
877:
832:
747:
722:
687:
17:
260:
The FPS-20 was widely used in Japan. They produced their own series of modifications, including a
3254:
2963:
2958:
2928:
2898:
2893:
2888:
2883:
2878:
2868:
2863:
2853:
2848:
2843:
2838:
2833:
2828:
2823:
2818:
2813:
2803:
2798:
2793:
2788:
2783:
2778:
2773:
2768:
2763:
2758:
2753:
2748:
2743:
2728:
2723:
2528:
2523:
2508:
2503:
2498:
2493:
2488:
2483:
2478:
2453:
2443:
2438:
2433:
2428:
2418:
2413:
2260:
1880:
1664:
1639:
1614:
1554:
1534:
1449:
1439:
1299:
1269:
1244:
1174:
847:
842:
787:
667:
268:
138:
308:
The second letter indicates the type of equipment, where P=Radar (pulsed), Q=Sonar, and R=Radio.
3686:
3309:
3294:
3187:
3177:
3172:
2873:
2858:
2808:
2738:
2733:
2635:
2518:
2448:
2423:
1865:
1824:
1464:
1123:
1108:
1057:
1047:
917:
902:
872:
867:
797:
782:
772:
727:
712:
497:(4 ed.). Point Mugu, California: Naval Air Warfare Center Weapons Division. p. 2-8.1.
159:
in the continental United States, and a variety of other users. The design started life as the
549:. Langley AFB, Virginia: United States Air Force Headquarters Air Combat Command. p. 73.
3319:
3249:
2605:
2600:
2580:
2555:
2400:
1930:
1819:
1724:
1694:
1062:
1037:
1032:
992:
957:
947:
932:
857:
852:
767:
3404:
3304:
3284:
3279:
3233:
3108:
2625:
2585:
2575:
2031:
1915:
1905:
1890:
1017:
912:
882:
817:
707:
692:
672:
190:
3389:
541:
8:
3314:
3299:
3289:
3274:
2700:
2685:
2675:
2660:
2640:
2473:
2468:
1900:
1133:
1067:
862:
175:
141:
130:
3324:
2690:
2670:
2630:
2615:
2610:
2463:
2458:
2377:
2372:
2367:
2054:
1910:
732:
609:
160:
588:
2565:
2550:
2545:
2357:
2352:
2159:
2149:
2144:
2139:
2134:
2129:
2124:
2119:
2109:
2104:
2099:
2094:
2089:
2084:
2079:
2074:
2064:
2059:
1955:
550:
582:
3372:
2347:
2337:
2322:
2317:
2154:
2114:
2049:
2021:
1885:
1850:
1147:
752:
677:
641:
543:
Searching the Skies: The Legacy of the United States Cold War
Defense Radar Program
374:
276:
576:
440:
3397:
2680:
2390:
2342:
2026:
2016:
1950:
489:
532:
2408:
1855:
812:
186:
3680:
3352:
3347:
3342:
3223:
1845:
1729:
1113:
887:
742:
488:
Avionics
Department (2013). "Missile and Electronic Equipment Designations".
148:
3420:
3334:
3218:
1895:
822:
792:
261:
3228:
185:
The first AN/FPS-3 arrived in
December 1950, slated for installation at
3665:
3660:
3655:
3650:
3645:
3640:
3635:
3630:
3625:
3620:
3615:
3610:
3605:
2006:
1940:
1925:
1169:
757:
214:
antenna pictured above the AN/FPS-20 is for the associated IFF system.
365:
According to
Winkler, the FPS-3 design was developed from the earlier
233:
and 91A. The similar MK-748 applied to the -60 series resulted in the
3600:
3595:
3590:
3585:
3580:
3575:
3570:
3565:
3560:
3555:
3550:
3545:
3540:
3535:
3530:
3525:
3520:
3515:
3510:
3505:
3500:
3495:
3490:
3485:
3480:
3475:
3470:
3465:
3460:
2665:
2560:
370:
198:
201:
at 750 kW peak power, operating at 1300 MHz a 400 Hz
3455:
3450:
3445:
3440:
3435:
3430:
2590:
2327:
222:
and AN/FPS-87A. The BADGE 412-L upgrade of the FPS-20A created the
167:
540:
Winkler, David F. (1997). "Radar Systems Classification Methods".
34:
114:
554:
429:
152:
127:
64:
156:
145:
3419:
491:
Electronic Warfare and Radar Systems Engineering Handbook
171:
639:
466:
267:
The Indian Air Force used the FPS-20 with a new digital
413:
411:
501:
454:
408:
249:. Canadian AN/FPS-87s were also converted, becoming
487:
286:
602:List of military electronics of the United States
396:
279:later produced a similar digital MTI system, the
3678:
3405:
625:
197:, a mobile version. The system used two 5J26
3068:Aerospace Defense Command Fighter Squadrons
483:
481:
3702:Military equipment introduced in the 1950s
3412:
3398:
632:
618:
33:
3712:Military electronics of the United States
299:Joint Electronics Type Designation System
293:Joint Electronics Type Designation System
193:. The FPS-3 and was also produced as the
478:
253:and 93A. These units were used with the
113:
539:
507:
472:
460:
417:
271:(MTI) system from Bendix to create the
14:
3679:
3073:Aircraft Control and Warning Squadrons
524:
402:
3697:Radars of the United States Air Force
3393:
613:
3692:Military radars of the United States
3379:General Surveillance Radar Stations
24:
3373:Air Defense Command Emblem Gallery
583:AN/FPS-3 Modification History Tree
25:
3723:
1146:
640:
2990:Aircraft Control & Warning
525:Bacque, Cramer (October 1990).
517:
287:Classification of radar systems
445:
434:
423:
359:
344:
335:
325:
135:ground-controlled interception
13:
1:
384:
137:radar system employed by the
389:
7:
595:
10:
3728:
3423:Ground-based search radars
290:
203:pulse repetition frequency
56:General Surveillance Radar
3428:
3365:
3333:
3242:
3211:
3122:
3096:
3085:
3060:
2537:
2309:
2168:
2040:
1989:
1978:
1838:
1162:
1155:
1144:
1096:
660:
653:
646:Aerospace Defense Command
104:
96:
88:
80:
70:
60:
52:
44:
32:
318:
571:AN/FPS-3, 3A, 3B; MPS-7
269:moving target indicator
139:United States Air Force
3375:(on Wikimedia Commons)
2384:Detection and Control
119:
45:Country of origin
39:Bendix AN/FPS-20 radar
430:CPS-5 at FortWiki.com
291:Further information:
117:
908:Minneapolis-St. Paul
191:Lashup Radar Network
2012:Western Air Defense
2002:Eastern Air Defense
1997:Central Air Defense
1705:San Clemente Island
1685:Rockville (Indiana)
589:AN/FPS-20 @ fas.org
577:AN/FPS-20, 20A, 20B
528:History of the BFEC
176:air traffic control
142:Air Defense Command
29:
28:AN/FPS-3, AN/FPS-20
3707:Bendix Corporation
2266:Sault Sainte Marie
1951:Saskatoon Mountain
1315:Continental Divide
126:was a widely used
120:
27:
3674:
3673:
3387:
3386:
3361:
3360:
3081:
3080:
1974:
1973:
1871:Cut Throat Island
1710:Santa Rosa Island
1290:Cheyenne Mountain
1195:Arlington Heights
1142:
1141:
475:, pp. 77–78.
112:
111:
16:(Redirected from
3719:
3414:
3407:
3400:
3391:
3390:
3094:
3093:
1987:
1986:
1715:Saratoga Springs
1595:North Charleston
1160:
1159:
1150:
1078:Wright-Patterson
753:Fort Gregg-Adams
658:
657:
644:
634:
627:
620:
611:
610:
558:
548:
536:
531:. Archived from
511:
505:
499:
498:
496:
485:
476:
470:
464:
458:
452:
449:
443:
438:
432:
427:
421:
415:
406:
400:
378:
375:General Electric
363:
351:
348:
342:
339:
333:
329:
277:General Dynamics
178:use, and became
37:
30:
26:
21:
3727:
3726:
3722:
3721:
3720:
3718:
3717:
3716:
3677:
3676:
3675:
3670:
3424:
3418:
3388:
3383:
3357:
3329:
3238:
3207:
3184:Supersonic Jet:
3118:
3089:
3087:
3077:
3056:
2533:
2305:
2164:
2042:
2036:
1982:
1980:
1970:
1921:Puntzi Mountain
1834:
1750:Tierra Amarilla
1720:Sault Ste Marie
1330:Crystal Springs
1151:
1138:
1092:
1008:Seymour Johnson
988:Richards-Gebaur
649:
638:
607:
598:
593:
564:Further reading
561:
546:
520:
515:
514:
506:
502:
494:
486:
479:
471:
467:
459:
455:
450:
446:
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428:
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409:
401:
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382:
381:
364:
360:
355:
354:
349:
345:
340:
336:
330:
326:
321:
295:
289:
174:, modified for
40:
23:
22:
15:
12:
11:
5:
3725:
3715:
3714:
3709:
3704:
3699:
3694:
3689:
3672:
3671:
3669:
3668:
3663:
3658:
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3513:
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3463:
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3448:
3443:
3438:
3429:
3426:
3425:
3417:
3416:
3409:
3402:
3394:
3385:
3384:
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3381:
3376:
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3302:
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2062:
2057:
2052:
2046:
2044:
2038:
2037:
2035:
2034:
2029:
2024:
2019:
2014:
2009:
2004:
1999:
1993:
1991:
1984:
1976:
1975:
1972:
1971:
1969:
1968:
1963:
1961:Spotted Island
1958:
1953:
1948:
1943:
1938:
1933:
1928:
1923:
1918:
1913:
1908:
1903:
1898:
1893:
1888:
1883:
1878:
1876:Elliston Ridge
1873:
1868:
1863:
1858:
1853:
1848:
1842:
1840:
1836:
1835:
1833:
1832:
1827:
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1817:
1812:
1807:
1802:
1797:
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1787:
1782:
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1762:
1757:
1752:
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1727:
1722:
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1707:
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1697:
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1687:
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1662:
1657:
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1607:
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1507:
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1497:
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1487:
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1467:
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1452:
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1442:
1437:
1432:
1427:
1422:
1417:
1412:
1407:
1402:
1397:
1392:
1387:
1382:
1377:
1372:
1367:
1362:
1357:
1355:Dauphin Island
1352:
1347:
1342:
1337:
1332:
1327:
1322:
1317:
1312:
1307:
1302:
1297:
1292:
1287:
1282:
1277:
1272:
1267:
1262:
1257:
1252:
1247:
1242:
1237:
1232:
1227:
1222:
1217:
1212:
1207:
1202:
1197:
1192:
1187:
1182:
1177:
1172:
1166:
1164:
1157:
1153:
1152:
1145:
1143:
1140:
1139:
1137:
1136:
1131:
1126:
1121:
1116:
1111:
1106:
1100:
1098:
1094:
1093:
1091:
1090:
1085:
1080:
1075:
1070:
1065:
1060:
1055:
1050:
1045:
1040:
1035:
1030:
1028:Suffolk County
1025:
1020:
1015:
1010:
1005:
1000:
995:
990:
985:
980:
975:
970:
965:
960:
955:
950:
945:
940:
935:
930:
925:
920:
915:
910:
905:
900:
895:
890:
885:
880:
875:
870:
865:
860:
855:
850:
845:
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835:
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815:
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795:
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755:
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745:
740:
735:
730:
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720:
715:
710:
705:
700:
695:
690:
685:
680:
675:
670:
664:
662:
655:
651:
650:
637:
636:
629:
622:
614:
605:
604:
597:
594:
592:
591:
586:
580:
574:
567:
566:
565:
560:
559:
537:
535:on 1999-10-02.
521:
519:
516:
513:
512:
500:
477:
465:
453:
444:
433:
422:
407:
394:
393:
391:
388:
386:
383:
380:
379:
357:
356:
353:
352:
343:
334:
323:
322:
320:
317:
313:
312:
309:
306:
288:
285:
187:Eniwetok Atoll
110:
109:
106:
102:
101:
98:
94:
93:
92:3.3, 5, 10 RPM
90:
86:
85:
82:
78:
77:
74:
68:
67:
62:
58:
57:
54:
50:
49:
46:
42:
41:
38:
9:
6:
4:
3:
2:
3724:
3713:
3710:
3708:
3705:
3703:
3700:
3698:
3695:
3693:
3690:
3688:
3687:Ground radars
3685:
3684:
3682:
3667:
3664:
3662:
3659:
3657:
3654:
3652:
3649:
3647:
3644:
3642:
3639:
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3627:
3624:
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3599:
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3499:
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3408:
3403:
3401:
3396:
3395:
3392:
3380:
3377:
3374:
3371:
3370:
3368:
3366:Miscellaneous
3364:
3354:
3353:Texas Tower 4
3351:
3349:
3348:Texas Tower 3
3346:
3344:
3343:Texas Tower 2
3341:
3340:
3338:
3336:
3332:
3326:
3323:
3321:
3318:
3316:
3313:
3311:
3308:
3306:
3303:
3301:
3298:
3296:
3293:
3291:
3288:
3286:
3283:
3281:
3278:
3276:
3273:
3271:
3268:
3266:
3263:
3261:
3258:
3256:
3253:
3251:
3248:
3247:
3245:
3241:
3235:
3232:
3230:
3227:
3225:
3222:
3220:
3217:
3216:
3214:
3210:
3204:
3201:
3199:
3196:
3194:
3191:
3189:
3186:
3183:
3182:
3179:
3176:
3174:
3171:
3169:
3166:
3164:
3161:
3159:
3156:
3154:Subsonic Jet:
3153:
3152:
3149:
3146:
3144:
3141:
3139:
3136:
3134:
3131:
3128:
3127:
3125:
3121:
3115:
3112:
3110:
3107:
3105:
3102:
3101:
3099:
3095:
3092:
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3069:
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3063:
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3033:
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3028:
3025:
3023:
3020:
3018:
3015:
3013:
3010:
3008:
3005:
3003:
3000:
2998:
2995:
2993:
2989:
2988:
2985:
2982:
2980:
2977:
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2800:
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2722:
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2712:
2709:
2707:
2704:
2702:
2699:
2697:
2694:
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2689:
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2684:
2682:
2679:
2677:
2674:
2672:
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2654:
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2649:
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2639:
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2627:
2624:
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2614:
2612:
2609:
2607:
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2579:
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2567:
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2559:
2557:
2554:
2552:
2549:
2547:
2543:
2542:
2540:
2536:
2530:
2527:
2525:
2522:
2520:
2517:
2515:
2512:
2510:
2507:
2505:
2502:
2500:
2497:
2495:
2492:
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2487:
2485:
2482:
2480:
2477:
2475:
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2470:
2467:
2465:
2462:
2460:
2457:
2455:
2452:
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2447:
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2442:
2440:
2437:
2435:
2432:
2430:
2427:
2425:
2422:
2420:
2417:
2415:
2412:
2410:
2406:
2405:
2402:
2399:
2397:
2394:
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2379:
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2344:
2341:
2339:
2336:
2334:
2331:
2329:
2326:
2324:
2321:
2319:
2315:
2314:
2312:
2308:
2302:
2299:
2297:
2294:
2292:
2289:
2287:
2284:
2282:
2279:
2277:
2274:
2272:
2271:San Francisco
2269:
2267:
2264:
2262:
2259:
2257:
2254:
2252:
2249:
2247:
2246:Oklahoma City
2244:
2242:
2239:
2237:
2234:
2232:
2229:
2227:
2224:
2222:
2219:
2217:
2214:
2212:
2209:
2207:
2204:
2202:
2199:
2197:
2194:
2192:
2189:
2187:
2184:
2182:
2179:
2177:
2174:
2173:
2171:
2167:
2161:
2158:
2156:
2153:
2151:
2148:
2146:
2143:
2141:
2138:
2136:
2133:
2131:
2128:
2126:
2123:
2121:
2118:
2116:
2113:
2111:
2108:
2106:
2103:
2101:
2098:
2096:
2093:
2091:
2088:
2086:
2083:
2081:
2078:
2076:
2073:
2071:
2068:
2066:
2063:
2061:
2058:
2056:
2053:
2051:
2048:
2047:
2045:
2039:
2033:
2030:
2028:
2025:
2023:
2020:
2018:
2015:
2013:
2010:
2008:
2005:
2003:
2000:
1998:
1995:
1994:
1992:
1988:
1985:
1977:
1967:
1964:
1962:
1959:
1957:
1956:Sioux Lookout
1954:
1952:
1949:
1947:
1944:
1942:
1939:
1937:
1934:
1932:
1929:
1927:
1924:
1922:
1919:
1917:
1914:
1912:
1909:
1907:
1904:
1902:
1899:
1897:
1894:
1892:
1889:
1887:
1884:
1882:
1879:
1877:
1874:
1872:
1869:
1867:
1864:
1862:
1861:Cape Makkovik
1859:
1857:
1854:
1852:
1849:
1847:
1844:
1843:
1841:
1837:
1831:
1828:
1826:
1823:
1821:
1818:
1816:
1815:Winston-Salem
1813:
1811:
1808:
1806:
1803:
1801:
1798:
1796:
1793:
1791:
1788:
1786:
1783:
1781:
1778:
1776:
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1771:
1768:
1766:
1763:
1761:
1758:
1756:
1753:
1751:
1748:
1746:
1743:
1741:
1738:
1736:
1735:Snow Mountain
1733:
1731:
1728:
1726:
1723:
1721:
1718:
1716:
1713:
1711:
1708:
1706:
1703:
1701:
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1633:
1631:
1628:
1626:
1623:
1621:
1618:
1616:
1613:
1611:
1608:
1606:
1605:Oklahoma City
1603:
1601:
1598:
1596:
1593:
1591:
1588:
1586:
1583:
1581:
1578:
1576:
1573:
1571:
1568:
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1563:
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1556:
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1551:
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1546:
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1528:
1526:
1523:
1521:
1518:
1516:
1513:
1511:
1508:
1506:
1503:
1501:
1498:
1496:
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1491:
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1471:
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1463:
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1458:
1456:
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1401:
1398:
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1381:
1378:
1376:
1373:
1371:
1368:
1366:
1363:
1361:
1358:
1356:
1353:
1351:
1350:Dallas Center
1348:
1346:
1343:
1341:
1338:
1336:
1333:
1331:
1328:
1326:
1323:
1321:
1318:
1316:
1313:
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1238:
1236:
1233:
1231:
1228:
1226:
1223:
1221:
1218:
1216:
1213:
1211:
1210:Bellefontaine
1208:
1206:
1203:
1201:
1198:
1196:
1193:
1191:
1188:
1186:
1183:
1181:
1178:
1176:
1173:
1171:
1168:
1167:
1165:
1161:
1158:
1154:
1149:
1135:
1132:
1130:
1127:
1125:
1122:
1120:
1117:
1115:
1112:
1110:
1109:Frobisher Bay
1107:
1105:
1104:Ernest Harmon
1102:
1101:
1099:
1095:
1089:
1086:
1084:
1081:
1079:
1076:
1074:
1071:
1069:
1066:
1064:
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1054:
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1044:
1041:
1039:
1036:
1034:
1031:
1029:
1026:
1024:
1021:
1019:
1016:
1014:
1011:
1009:
1006:
1004:
1001:
999:
996:
994:
991:
989:
986:
984:
981:
979:
976:
974:
971:
969:
966:
964:
961:
959:
956:
954:
951:
949:
946:
944:
941:
939:
936:
934:
931:
929:
928:Niagara Falls
926:
924:
921:
919:
916:
914:
911:
909:
906:
904:
901:
899:
896:
894:
891:
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884:
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871:
869:
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846:
844:
841:
839:
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749:
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729:
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724:
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719:
716:
714:
711:
709:
706:
704:
701:
699:
696:
694:
691:
689:
686:
684:
683:Davis-Monthan
681:
679:
676:
674:
671:
669:
666:
665:
663:
659:
656:
652:
647:
643:
635:
630:
628:
623:
621:
616:
615:
612:
608:
603:
600:
599:
590:
587:
585:, radomes.org
584:
581:
579:, radomes.org
578:
575:
573:, radomes.org
572:
569:
568:
563:
562:
556:
552:
545:
544:
538:
534:
530:
529:
523:
522:
510:, p. 73.
509:
504:
493:
492:
484:
482:
474:
469:
463:, p. 40.
462:
457:
448:
442:
437:
431:
426:
420:, p. 76.
419:
414:
412:
404:
399:
395:
376:
372:
368:
362:
358:
347:
338:
328:
324:
316:
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307:
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300:
294:
284:
282:
278:
274:
270:
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256:
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236:
232:
227:
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221:
215:
212:
206:
204:
200:
196:
192:
188:
183:
181:
177:
173:
169:
165:
162:
158:
154:
150:
149:Pinetree Line
147:
143:
140:
136:
132:
131:early warning
129:
125:
116:
107:
103:
99:
95:
91:
87:
83:
79:
75:
73:
69:
66:
63:
59:
55:
51:
48:United States
47:
43:
36:
31:
19:
3421:US Air Force
3335:Texas Towers
3270:Investigator
2717:Air Defense
2407:Air Defense
1966:Stephenville
1851:Baldy Hughes
1780:Walnut Ridge
1700:Saint Albans
1580:Mount Lemmon
1575:Mount Laguna
1490:Lake Charles
1425:Grand Rapids
1420:Grand Marais
1260:Cape Charles
1240:Bucks Harbor
978:Presque Isle
898:McGhee Tyson
606:
542:
533:the original
527:
518:Bibliography
508:Winkler 1997
503:
490:
473:Winkler 1997
468:
461:Winkler 1997
456:
447:
436:
425:
418:Winkler 1997
398:
366:
361:
346:
337:
327:
314:
296:
280:
272:
266:
262:tunnel diode
259:
250:
246:
242:
238:
234:
230:
228:
223:
219:
216:
210:
207:
194:
184:
179:
163:
123:
121:
3265:Interpreter
3260:Interdictor
3255:Interceptor
2226:Los Angeles
2221:Kansas City
2216:Great Falls
2211:Grand Forks
2176:Albuquerque
1946:St. Anthony
1881:Fox Harbour
1755:Thomasville
1660:Port Isabel
1655:Port Austin
1650:Point Arena
1635:Owingsville
1600:North Truro
1550:Mill Valley
1525:Lyndonville
1400:Fort Fisher
1365:Duncanville
998:K.I. Sawyer
778:Grand Forks
738:Ethan Allen
441:Radar Types
403:Bacque 1990
155:, the USAF
105:Other Names
3681:Categories
3666:AN/FPS-132
3661:AN/FPS-129
3656:AN/FPS-126
3651:AN/FPS-124
3646:AN/FPS-123
3641:AN/FPS-120
3636:AN/FPS-117
3631:AN/FPS-116
3626:AN/FPS-115
3621:AN/FPS-113
3616:AN/FPS-108
3611:AN/FPS-107
3606:AN/FPS-100
3310:Skywatcher
3129:Propeller:
3097:Electronic
2301:Washington
2281:Sioux City
2236:Montgomery
2032:Fourteenth
1866:Cartwright
1856:Beausejour
1805:Winnemucca
1800:Willow Run
1770:Two Creeks
1740:Sweetwater
1590:North Bend
1570:Mount Hebo
1545:Miles City
1500:Las Cruces
1480:Kirksville
1455:Hutchinson
1435:Hanna City
1415:Gettysburg
1390:Flintstone
1325:Cross City
1320:Cottonwood
1285:Charleston
1230:Brookfield
1215:Belleville
1129:Pepperrell
1088:Youngstown
1053:Vandenberg
1013:Sioux City
968:Pittsburgh
923:New Castle
758:Fort Heath
678:Charleston
385:References
369:design by
297:Under the
281:AN/FPS-113
273:AN/FPS-100
247:AN/FPS-67A
243:AN/FPS-66A
239:AN/FPS-65A
235:AN/FPS-64A
199:magnetrons
118:The FPS-3.
100:750 kW x 2
81:Pulsewidth
3601:AN/FPS-95
3596:AN/FPS-93
3591:AN/FPS-92
3586:AN/FPS-91
3581:AN/FPS-90
3576:AN/FPS-87
3571:AN/FPS-85
3566:AN/FPS-82
3561:AN/FPS-67
3556:AN/FPS-66
3551:AN/FPS-65
3546:AN/FPS-64
3541:AN/FPS-50
3536:AN/FPS-49
3531:AN/FPS-41
3526:AN/FPS-35
3521:AN/FPS-30
3516:AN/FPS-27
3511:AN/FPS-26
3506:AN/FPS-24
3501:AN/FPS-23
3496:AN/FPS-20
3491:AN/FPS-19
3486:AN/FPS-18
3481:AN/FPS-17
3476:AN/FPS-16
3471:AN/FPS-14
3466:AN/FPS-12
3461:AN/FPS-10
3295:Protector
3061:Squadrons
2043:Divisions
1936:Rockville
1931:Red Cliff
1846:Armstrong
1795:West Mesa
1785:Watertown
1745:Texarkana
1675:Rochester
1670:Red Bluff
1540:Mica Peak
1510:Lewistown
1505:Las Vegas
1495:Lake City
1445:Highlands
1360:Dickinson
1295:Claysburg
1235:Brunswick
1083:Wurtsmith
1003:Selfridge
983:R.I. Bong
893:McClellan
878:Malmstrom
833:Kincheloe
808:Homestead
723:Ellsworth
718:Ellington
390:Citations
371:Bell Labs
251:AN/FPS-93
231:AN/FPS-91
224:AN/FPS-82
220:AN/FPS-87
211:AN/GPA-27
124:AN/FPS-20
61:Frequency
3456:AN/FPS-8
3451:AN/FPS-7
3446:AN/FPS-6
3441:AN/FPS-5
3436:AN/FPS-4
3431:AN/FPS-3
3320:Watchman
3305:Searcher
3250:Guardian
3212:Missiles
3123:Fighters
2544:Fighter
2316:Fighter
2296:Syracuse
2256:Portland
2241:New York
1916:Melville
1906:Langanes
1896:Kamloops
1891:Hopedale
1839:Overseas
1730:Snelling
1680:Rockport
1565:Moriarty
1515:Lockport
1405:Fort Lee
1395:Fordland
1370:Eldorado
1345:Cut Bank
1305:Colville
1280:Chandler
1265:Cape Cod
1156:Stations
1124:McAndrew
1119:Keflavik
1097:Overseas
1073:Westover
973:Portland
963:Peterson
848:Lackland
843:Kirtland
838:Kingsley
828:Key West
813:Hurlburt
798:Hamilton
788:Griffiss
668:Amarillo
596:See Also
555:97020912
332:renamed.
257:system.
195:AN/MPS-7
180:ARSR-60s
168:Cold War
164:AN/FPS-3
18:AN/FPS-3
3300:Scanner
3290:Pickett
3285:Outpost
3280:Lookout
3275:Locator
3090:systems
2291:Stewart
2286:Spokane
2276:Seattle
2251:Phoenix
2196:Detroit
2191:Chicago
2169:Sectors
2007:Iceland
1981:Defense
1901:La Scie
1820:Woomera
1810:Winslow
1790:Waverly
1765:Topsham
1760:Tonopah
1645:Palermo
1630:Othello
1625:Osceola
1585:Naselle
1560:Montauk
1485:Klamath
1475:Kingman
1470:Killeen
1460:Joelton
1430:Guthrie
1410:Fortuna
1380:Finland
1275:Caswell
1255:Cambria
1250:Calumet
1205:Bedford
1180:Almaden
1058:Vincent
1048:Tyndall
1023:Stewart
918:Mitchel
903:McGuire
888:McChord
868:MacDill
803:Hancock
783:Grenier
773:Glasgow
743:Fairfax
728:England
713:Edwards
688:Dobbins
3315:Tracer
3234:CIM-10
3224:AIM-26
3114:EC-121
3088:weapon
2984:4756th
2979:4750th
2974:4735th
2969:4734th
2954:4731st
2949:4730th
2944:4729th
2939:4728th
2934:4727th
2924:4721st
2919:4700th
2914:4676th
2909:4620th
2904:4606th
2538:Groups
2529:4780th
2524:4756th
2514:4751st
2509:4750th
2504:4711th
2499:4710th
2494:4709th
2489:4708th
2484:4707th
2479:4706th
2474:4705th
2469:4704th
2454:4700th
2444:4628th
2439:4627th
2434:4625th
2429:4624th
2419:4621st
2414:4620th
2201:Duluth
2186:Boston
2181:Bangor
2022:Fourth
1990:Forces
1941:Saglek
1926:Ramore
1911:Latrar
1830:Zapata
1775:Wadena
1725:Shemya
1690:Roslyn
1620:Opheim
1610:Olathe
1530:Madera
1520:Lufkin
1385:Finley
1375:Empire
1340:Custer
1335:Curlew
1310:Condon
1225:Blaine
1220:Benton
1190:Antigo
1185:Alpena
1063:Walker
1038:Travis
1033:Tinker
993:Robins
958:Perrin
948:Oxnard
938:O'Hare
933:Norton
858:Larson
853:Laredo
823:Imeson
818:Hunter
793:Gunter
768:George
763:Geiger
748:Fallon
703:Duluth
553:
161:Bendix
153:Canada
144:, the
128:L band
65:L band
3325:Vigil
3243:Ships
3229:AIR-2
3219:AIM-4
3203:F-106
3198:F-104
3193:F-102
3188:F-101
3109:EB-57
3104:TB-29
3086:Major
3052:566th
3047:565th
3042:564th
3032:546th
3027:545th
3022:544th
3007:541st
3002:540th
2997:505th
2964:4733d
2959:4732d
2929:4722d
2899:858th
2894:827th
2889:780th
2884:778th
2879:765th
2869:751st
2864:701st
2854:678th
2849:665th
2844:637th
2839:575th
2834:568th
2829:567th
2824:566th
2819:564th
2814:534th
2804:530th
2799:529th
2794:528th
2789:527th
2784:525th
2779:521st
2774:520th
2769:519th
2764:518th
2759:517th
2754:516th
2749:515th
2744:514th
2729:501st
2724:500th
2711:507th
2706:478th
2701:476th
2696:475th
2686:414th
2681:412th
2676:408th
2671:355th
2661:337th
2656:329th
2651:328th
2646:327th
2641:326th
2636:325th
2519:4752d
2464:4703d
2459:4702d
2449:4683d
2424:4622d
2396:551st
2378:507th
2373:328th
2368:325th
2310:Wings
2231:Minot
2206:Goose
2027:Tenth
2017:First
1983:units
1665:Pyote
1640:Ozona
1615:Omaha
1555:Minot
1535:Makah
1450:Houma
1440:Havre
1300:Clear
1270:Carmi
1245:Burns
1200:Baker
1175:Aiken
1170:Adair
1163:CONUS
1134:Thule
1114:Goose
1043:Truax
1018:Stead
953:Paine
913:Minot
883:McCoy
873:March
708:Eglin
693:Dover
673:Beale
661:CONUS
654:Bases
648:(ADC)
547:(PDF)
495:(PDF)
367:CPS-5
319:Notes
157:CONAD
146:NORAD
97:Power
3178:F-94
3173:F-89
3168:F-86
3163:F-84
3158:P-80
3148:F-82
3143:P-61
3138:F-51
3133:F-47
3037:563d
3017:543d
3012:542d
2992:503d
2874:762d
2859:692d
2809:533d
2739:503d
2734:502d
2719:10th
2691:473d
2666:343d
2631:84th
2621:81st
2616:79th
2611:78th
2606:57th
2601:56th
2596:54th
2581:50th
2561:15th
2556:14th
2409:46th
2401:552d
2386:71st
2363:81st
2358:78th
2353:56th
2343:50th
2261:Reno
2160:85th
2150:64th
2145:58th
2140:37th
2135:36th
2130:35th
2125:34th
2110:31st
2105:30th
2100:29th
2095:28th
2090:27th
2085:26th
2080:25th
2075:24th
2065:21st
2060:20th
1886:Hofn
1825:Yaak
1465:Keno
1068:Webb
943:Otis
863:Luke
551:LCCN
373:and
255:SAGE
245:and
133:and
122:The
84:4 ÎĽS
53:Type
2626:82d
2591:53d
2586:52d
2576:33d
2571:32d
2566:23d
2551:4th
2546:1st
2391:73d
2348:52d
2338:33d
2333:32d
2328:23d
2323:4th
2318:1st
2155:73d
2120:33d
2115:32d
2070:23d
2055:9th
2050:8th
2041:Air
1979:Air
1695:Rye
733:Ent
698:Dow
172:FAA
151:in
89:RPM
76:440
72:PRF
3683::
480:^
410:^
283:.
241:,
237:,
226:.
182:.
3413:e
3406:t
3399:v
633:e
626:t
619:v
557:.
405:.
20:)
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