240:
27:
293:
265:
WSR-74C radars were generally local-use radars that didn't operate unless severe weather was expected, while WSR-74S radars were generally used to replace WSR-57 radars in the national weather surveillance network. When a network radar went down, a nearby local radar might have to supply updates
253:
The WSR-57 network was very spread out, with 66 radars to cover the entire country. There was little to no overlap in case one of these vacuum-tube radars went down for maintenance. The WSR-74 was introduced as a "gap filler", as well as an updated radar that, among other things, was
273:
128 of the WSR-57 and WSR-74 model radars were spread across the country as the
National Weather Service's radar network until the 1990s. They were gradually replaced by the WSR-88D model (Weather Surveillance Radar - 1988, Doppler), constituting the
1564:
220:). S band frequencies are better suited because they are not attenuated significantly in heavy rain while the C Band is strongly attenuated, and has a generally shorter maximum effective range.
1862:
1796:
223:
The WSR-74C uses a wavelength of 5.4 cm. It also has a dish diameter of 8 feet, and a maximum range of 579 km (313 nm) as it was used only for
208:
There are two types in the WSR-74 series, which are almost identical except for operating frequency. The WSR-74C (used for local warnings) operates in the
1458:
255:
200:
model to improve forecasts and severe weather warnings. Some have been sold to other countries like
Australia, Greece, and Pakistan.
1603:
715:
284:
No WSR-74S's are in the NWS inventory today, having been replaced by the WSR-88D, but some of these radars are in commercial use.
1599:
1584:
292:
1538:
695:
1608:
1780:
262:
won the contract to design, manufacture, test, and deliver the entire WSR-74 radar network (both C and S-Band versions).
266:
like a network radar. NWS Lubbock received the first WSR-74C in August 1973 following widespread attention from the F5
1559:
244:
103:
1451:
1415:
WSR-74S providing local coverage. Became part of the national network after the WSR-57 at Miami was destroyed in
860:
1703:
1684:
296:
Circles showing the coverage of the WSR-57 and WSR-74 radars. Note the large gap over the western United States.
281:
The last WSR-74C used by the NWS was located in
Williston, ND, before being decommissioned at the end of 2012.
193:
1689:
1683:
Whiton, Roger C.; Smith, Paul L.; Bigler, Stuart G.; Wilk, Kenneth E.; Harbuck, Albert C. (1 June 1998).
1103:
1444:
1554:
259:
1685:"History of Operational Use of Weather Radar by U.S. Weather Services. Part I: The Pre-NEXRAD Era"
1724:
1708:
1716:
1569:
1698:
1416:
26:
1784:
267:
239:
1845:
1741:
1249:
1856:
1728:
1482:
1468:
228:
209:
95:
78:
40:
1574:
1264:
224:
1821:
581:
1638:
1777:
1321:
1720:
1712:
1670:
1753:
1589:
1492:
1487:
247:
115:
1296:
1040:
843:
1594:
1497:
1579:
217:
1613:
1533:
1523:
1502:
1376:
1357:
1334:
1309:
1273:
1224:
275:
213:
197:
89:
1436:
1518:
1154:
291:
238:
177:
302:
212:, and the WSR-74S (used in the national network) operates in the
1822:"Assessment of Nexrad Coverage and Associated Weather Services"
1440:
1704:
10.1175/1520-0434(1998)013<0219:HOOUOW>2.0.CO;2
278:
network. The WSR-74 had served the NWS for two decades.
749:
On top of the
Federal Building in Westwood to this day.
364:
Was atop the WSFO building at 3420 Norman Berry Drive
1665:Paul Sirvatka. "WSR - Weather Surveillance Radar."
1547:
1511:
1475:
300:WSR-74 sites include the following two categories:
162:
154:
144:
136:
126:
114:
102:
84:
74:
61:
46:
36:
1671:<http://weather.cod.edu/sirvatka/radar.html>
1241:Was a WSR-74C from Oct. 9, 1976 to Nov. 27, 1977
196:. They were added to the existing network of the
1697:(2). American Meteorological Society: 219–243.
1452:
8:
19:
1778:http://sysu1.wsicorp.com/unidata/intro.html
1459:
1445:
1437:
25:
18:
1702:
31:WSR-74C radar from Central Illinois WFO.
1863:National Weather Service weather radars
1630:
254:transistor-based. In the early 1970s,
718:radar, still used by Local Media/NWS.
700:(Doppler capability after July 1991)
7:
158:0.9 km (0.56 mi) in range
256:Enterprise Electronics Corporation
148:2.6 m (8.5 ft) (WSR-74C)
14:
1797:"Weather radar shutdown imminent"
1669:. College of DuPage. 4 Apr. 2006
1390:WSR-74S providing local coverage
1253:WSR-74S providing local coverage
1194:WSR-74S providing local coverage
216:(like the WSR-57 and the current
150:3.7 m (12 ft) (WSR-74S)
1754:"NWS Lubbock, TX Office History"
1600:Multifunction Phased Array Radar
1585:Advanced Technology Demonstrator
1326:At East Memphis/Agricenter site
192:adars designed in 1974 for the
62:
1:
1609:Joint Polarization Experiment
1512:Weather surveillance radars
1387:San Juan, Puerto Rico (SJU)
1879:
1846:Stormtrack.org Forum 10344
661:Atop the Federal Building
245:Darwin, Northern Territory
16:Weather surveillance radar
1742:Stormtrack.org Forum 9498
1412:West Palm Beach, FL (PBI)
575:Corpus Christi, TX (CRP)
24:
1346:Patuxent River, MD (NHK)
1121:Wichita Falls, TX (SPS)
921:At the Paducah Airport.
684:Houghton Lake, MI (HTL)
194:National Weather Service
110:545 and 162 Hz (WSR-74S)
1783:April 20, 2008, at the
1690:Weather and Forecasting
1639:"Advanced Search - ITS"
1476:Military weather radars
897:North Platte, NE (LBF)
724:Indianapolis, IN (IND)
1349:At Patuxent River NAS
1018:Sioux Falls, SD (FSD)
464:Chattanooga, TN (CHA)
398:Baton Rouge, LA (BTR)
297:
250:
37:Country of origin
1401:Volens, VA (VQN/7VM)
1301:(Doppler capability)
1180:Binghamton, NY (BGM)
1041:Springfield, IL (SPI)
1029:South Bend, IN (SBN)
1007:Shreveport, LA (SHV)
985:San Angelo, TX (SJT)
964:Rapid City, SD (RAP)
760:Louisville, KY (SDF)
746:Los Angeles, CA (LAX)
659:Harrisburg, PA (HAR)
627:Fort Wayne, IN (FWA)
611:Fort Smith, AR (FSM)
442:Burlington, VT (BTV)
295:
288:Radar sites in the US
242:
1297:Marseilles, IL (MMO)
1191:Charleston, WV (CRW)
1143:Worcester, MA (ORH)
1132:Williston, ND (ISN)
974:Rochester, MN (RST)
859:(Doppler capability
856:Montgomery, AL (MGM)
812:Marquette, MI (MQT)
796:At Madison Airport.
735:Las Vegas, NV (LAS)
696:Huntsville, AL (HSV)
559:Concordia, KS (CNK)
486:Cleveland, OH (CLE)
453:Charlotte, NC (CLT)
258:(EEC), based out of
132:1 and 4 μs (WSR-74S)
1382:September 13, 1995
1369:Portland, ME (PWM)
1360:at Washington, DC.
1285:Longview, TX (GGG)
1186:September 26, 1995
1169:Alliance, NE (AIA)
1110:Waterloo, IA (ALO)
996:Savannah, GA (SAV)
943:Portland, OR (PDX)
875:Muskegon, MI (MKG)
822:Meridian, MS (MEI)
727:September 28, 1977
673:Hartford, CT (BDL)
643:Goodland, KS (GLD)
543:Columbus, OH (CMH)
532:Columbus, GA (CSG)
518:Columbia, SC (CAE)
502:Columbia, MO (COU)
478:September 15, 1976
475:Cheyenne, WY (CYS)
459:September 17, 1996
431:Bismarck, ND (BIS)
420:Billings, MT (BIL)
260:Enterprise, Alabama
21:
1519:WSR-1, 1A, 3 and 4
1423:December 17, 1980
1396:February 26, 1999
1364:November 17, 1995
1265:Key West, FL (EYW)
1244:November 27, 1996
1217:Detroit, MI (DTW)
1206:Chatham, MA (CHH)
1138:December 31, 2012
1135:February 21, 1978
1127:December 26, 1996
1113:November 19, 1976
1104:September 13, 1995
1002:February 11, 1997
999:November 15, 1982
959:December 22, 1995
953:Raleigh, NC (RDU)
933:Phoenix, AZ (PHX)
928:February 23, 1996
902:November 27, 1996
886:Norfolk, NE (OFK)
828:December 26, 1996
771:Lubbock, TX (LBB)
763:April or May 1978
741:September 1, 1995
730:February 28, 1996
711:December 15, 1999?
707:Replaced a WSR-3.
650:Replaced a WSR-3.
634:Replaced a WSR-3.
618:Replaced a WSR-3.
606:January 15, 2000?
566:Replaced a WSR-3.
550:Replaced a WSR-3.
523:Replaced a WSR-1.
509:Replaced a WSR-3.
497:November 15, 1995
493:Replaced a WSR-3.
456:February 28, 1978
437:February 28, 1996
409:Beckley, WV (BKW)
376:Augusta, GA (AGS)
334:November 15, 1995
317:Abilene, TX (ABI)
298:
251:
94:5400 MHz (WSR-74C
88:2890 MHz (WSR-74S
1622:
1621:
1430:
1429:
1426:October 13, 1995
1407:December 1, 1995
1322:Memphis, TN (MEG)
1316:January 19, 1996
1305:November 1, 1974.
1280:October 20, 1998
1250:Jackson, KY (JKL)
1230:November 9, 1995
1201:January 12, 1996
1175:January 17, 1997
1153:
1152:
1124:February 5, 1977
1116:January 17, 1997
1100:November 8, 1976
1092:December 6, 1995
1086:Tupelo, MS (TUP)
1064:Tucson, AZ (TUS)
1059:November 2, 1995
1053:Topeka, KS (TOP)
1045:October 16, 1980
1032:October 22, 1982
969:November 4, 1996
948:January 30, 1996
918:Paducah, KY (PAH)
851:January 19, 1996
838:October 12, 1995
833:Mobile, AL (MOB)
825:November 2, 1976
803:Replaced a WSR-3
793:Madison, WI (MSN)
690:December 9, 1996
687:February 1, 1977
679:November 2, 1995
668:January 12, 1996
654:October 25, 1995
614:November 25, 1975
589:Duluth, MN (DLH)
578:February 1, 1976
570:November 9, 1995
562:February 18, 1977
554:December 1, 1995
527:October 25, 1995
521:January 26, 1976
448:January 29, 1998
415:January 12, 1996
412:November 1, 1977
401:October 20, 1978
393:October 13, 1995
387:Austin, TX (AUS)
371:February 1, 1996
368:October 20, 1976
361:Atlanta, GA (ATL)
356:December 9, 1996
350:Alpena, MI (APN)
345:November 2, 1995
339:Albany, NY (ALB)
243:WSR-74C Radar in
172:
171:
1870:
1848:
1843:
1837:
1836:
1834:
1832:
1818:
1812:
1811:
1809:
1807:
1801:Williston Herald
1793:
1787:
1775:
1769:
1768:
1766:
1764:
1750:
1744:
1739:
1733:
1732:
1706:
1680:
1674:
1663:
1657:
1656:
1654:
1652:
1643:
1635:
1534:WSR-88D (NEXRAD)
1529:WSR-74C and -74S
1461:
1454:
1447:
1438:
1417:Hurricane Andrew
1238:February 1, 1978
1235:Fargo, ND (FAR)
1155:
1075:Tulsa, OK (TUL)
1024:October 4, 1996
980:January 9, 1997
938:August 15, 1994
907:Omaha, NE (OVN)
881:August 13, 1996
848:August 30, 1977
844:Moline, IL (MLI)
782:Macon, GA (MCN)
603:August 30, 1977
505:November 9, 1977
434:October 5, 1978
328:Akron, OH (CAK)
320:August 27, 1977
303:
204:Radar properties
168:500 KW (WSR-74S)
166:250 KW (WSR-74C)
108:259 Hz (WSR-74C)
64:
57:
55:
29:
22:
1878:
1877:
1873:
1872:
1871:
1869:
1868:
1867:
1853:
1852:
1851:
1844:
1840:
1830:
1828:
1820:
1819:
1815:
1805:
1803:
1795:
1794:
1790:
1785:Wayback Machine
1776:
1772:
1762:
1760:
1752:
1751:
1747:
1740:
1736:
1682:
1681:
1677:
1664:
1660:
1650:
1648:
1641:
1637:
1636:
1632:
1628:
1623:
1618:
1548:Research radars
1543:
1507:
1471:
1465:
1435:
1413:
1404:April 12, 1977
1388:
1374:
1373:
1354:
1347:
1331:
1324:
1306:
1299:
1291:March 14, 1996
1270:
1252:
1240:
1239:
1222:
1221:
1192:
1164:Decommissioned
1097:Waco, TX (ACT)
1078:March 12, 1976
1070:March 14, 1996
991:April 22, 1997
919:
892:March 25, 1997
878:March 25, 1976
857:
801:
794:
785:April 18, 1977
747:
712:
705:
698:
648:
647:
632:
631:
616:
615:
600:Erie, PA (ERI)
595:March 25, 1997
564:
563:
548:
547:
507:
506:
491:
490:
481:April 24, 1996
423:April 18, 1978
362:
323:April 30, 1997
312:Decommissioned
290:
268:Lubbock tornado
237:
229:Doppler dilemma
206:
167:
149:
131:
121:
109:
93:
69:
53:
51:
32:
17:
12:
11:
5:
1876:
1874:
1866:
1865:
1855:
1854:
1850:
1849:
1838:
1813:
1788:
1770:
1745:
1734:
1675:
1658:
1629:
1627:
1624:
1620:
1619:
1617:
1616:
1611:
1606:
1597:
1592:
1587:
1582:
1577:
1572:
1567:
1562:
1557:
1551:
1549:
1545:
1544:
1542:
1541:
1536:
1531:
1526:
1521:
1515:
1513:
1509:
1508:
1506:
1505:
1500:
1495:
1490:
1485:
1479:
1477:
1473:
1472:
1469:weather radars
1466:
1464:
1463:
1456:
1449:
1441:
1434:
1431:
1428:
1427:
1424:
1421:
1409:
1408:
1405:
1402:
1398:
1397:
1394:
1392:
1384:
1383:
1380:
1372:March 5, 1985
1370:
1366:
1365:
1362:
1351:
1343:
1342:
1341:June 21, 1995
1339:
1328:
1318:
1317:
1314:
1303:
1293:
1292:
1289:
1288:March 1, 1978
1286:
1282:
1281:
1278:
1267:
1261:
1260:
1257:
1256:April 1, 1981
1254:
1246:
1245:
1242:
1236:
1232:
1231:
1228:
1218:
1214:
1213:
1212:April 5, 1995
1210:
1207:
1203:
1202:
1199:
1196:
1188:
1187:
1184:
1183:March 8, 1978
1181:
1177:
1176:
1173:
1172:June 10, 1977
1170:
1166:
1165:
1162:
1159:
1151:
1150:
1149:April 5, 1995
1147:
1144:
1140:
1139:
1136:
1133:
1129:
1128:
1125:
1122:
1118:
1117:
1114:
1111:
1107:
1106:
1101:
1098:
1094:
1093:
1090:
1089:April 1, 1983
1087:
1083:
1082:
1081:April 5, 1995
1079:
1076:
1072:
1071:
1068:
1065:
1061:
1060:
1057:
1054:
1050:
1049:
1048:July 30, 1996
1046:
1043:
1037:
1036:
1033:
1030:
1026:
1025:
1022:
1019:
1015:
1014:
1011:
1008:
1004:
1003:
1000:
997:
993:
992:
989:
986:
982:
981:
978:
975:
971:
970:
967:
965:
961:
960:
957:
954:
950:
949:
946:
944:
940:
939:
936:
934:
930:
929:
926:
923:
915:
914:
913:July 10, 1996
911:
908:
904:
903:
900:
898:
894:
893:
890:
887:
883:
882:
879:
876:
872:
871:
868:
865:
853:
852:
849:
846:
840:
839:
836:
834:
830:
829:
826:
823:
819:
818:
817:July 16, 1996
815:
813:
809:
808:
805:
800:June 19, 1979
798:
790:
789:
788:April 3, 1996
786:
783:
779:
778:
777:April 3, 1996
775:
772:
768:
767:
766:July 19, 1994
764:
761:
757:
756:
753:
751:
743:
742:
739:
736:
732:
731:
728:
725:
721:
720:
709:
702:
692:
691:
688:
685:
681:
680:
677:
674:
670:
669:
666:
665:June 28, 1977
663:
656:
655:
652:
644:
640:
639:
636:
630:March 12, 1976
628:
624:
623:
620:
612:
608:
607:
604:
601:
597:
596:
593:
590:
586:
585:
579:
576:
572:
571:
568:
560:
556:
555:
552:
544:
540:
539:
538:April 3, 1996
536:
535:April 2, 1979
533:
529:
528:
525:
519:
515:
514:
513:June 19, 1996
511:
503:
499:
498:
495:
489:August 4, 1976
487:
483:
482:
479:
476:
472:
471:
470:June 10, 1998
468:
465:
461:
460:
457:
454:
450:
449:
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443:
439:
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435:
432:
428:
427:
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421:
417:
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413:
410:
406:
405:
402:
399:
395:
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391:
390:April 9, 1976
388:
384:
383:
382:July 30, 1996
380:
377:
373:
372:
369:
366:
358:
357:
354:
351:
347:
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343:
342:July 27, 1977
340:
336:
335:
332:
329:
325:
324:
321:
318:
314:
313:
310:
307:
289:
286:
236:
233:
225:reflectivities
205:
202:
170:
169:
164:
160:
159:
156:
152:
151:
146:
142:
141:
138:
134:
133:
130:3 μs (WSR-74C)
128:
124:
123:
120:1.6° (WSR-74C)
118:
112:
111:
106:
100:
99:
86:
82:
81:
76:
72:
71:
66:
59:
58:
48:
44:
43:
38:
34:
33:
30:
15:
13:
10:
9:
6:
4:
3:
2:
1875:
1864:
1861:
1860:
1858:
1847:
1842:
1839:
1827:
1823:
1817:
1814:
1802:
1798:
1792:
1789:
1786:
1782:
1779:
1774:
1771:
1759:
1755:
1749:
1746:
1743:
1738:
1735:
1730:
1726:
1722:
1718:
1714:
1710:
1705:
1700:
1696:
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1679:
1676:
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1668:
1662:
1659:
1647:
1640:
1634:
1631:
1625:
1615:
1612:
1610:
1607:
1605:
1601:
1598:
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1593:
1591:
1588:
1586:
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1581:
1578:
1576:
1573:
1571:
1568:
1566:
1563:
1561:
1558:
1556:
1553:
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1550:
1546:
1540:
1537:
1535:
1532:
1530:
1527:
1525:
1522:
1520:
1517:
1516:
1514:
1510:
1504:
1501:
1499:
1496:
1494:
1491:
1489:
1486:
1484:
1483:SCR-658 radar
1481:
1480:
1478:
1474:
1470:
1462:
1457:
1455:
1450:
1448:
1443:
1442:
1439:
1432:
1425:
1422:
1420:
1418:
1411:
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1406:
1403:
1400:
1399:
1395:
1393:
1391:
1386:
1385:
1381:
1378:
1371:
1368:
1367:
1363:
1361:
1359:
1352:
1350:
1345:
1344:
1340:
1338:
1336:
1330:January 1986.
1329:
1327:
1323:
1320:
1319:
1315:
1313:
1311:
1304:
1302:
1298:
1295:
1294:
1290:
1287:
1284:
1283:
1279:
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1220:March 9, 1984
1219:
1216:
1215:
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1198:May 16, 1977
1197:
1195:
1190:
1189:
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1179:
1178:
1174:
1171:
1168:
1167:
1163:
1160:
1157:
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1148:
1146:July 2, 1976
1145:
1142:
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1137:
1134:
1131:
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1126:
1123:
1120:
1119:
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1067:January 1983
1066:
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988:October 1977
987:
984:
983:
979:
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972:
968:
966:
963:
962:
958:
956:May 19, 1977
955:
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951:
947:
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917:
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773:
770:
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762:
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755:May 15, 1995
754:
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734:
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729:
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723:
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719:
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710:
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697:
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689:
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682:
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672:
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664:
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638:July 8, 1998
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622:July 7, 1998
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501:
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469:
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426:May 30, 1996
425:
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404:May 14, 1996
403:
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397:
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389:
386:
385:
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379:July 1, 1976
378:
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370:
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365:
360:
359:
355:
353:June 8, 1977
352:
349:
348:
344:
341:
338:
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331:June 1, 1977
330:
327:
326:
322:
319:
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315:
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308:
305:
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301:
294:
287:
285:
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279:
277:
271:
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263:
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219:
215:
211:
203:
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165:
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157:
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147:
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139:
135:
129:
125:
119:
117:
113:
107:
105:
101:
97:
91:
87:
83:
80:
79:Weather radar
77:
73:
67:
60:
49:
45:
42:
41:United States
39:
35:
28:
23:
1841:
1829:. Retrieved
1825:
1816:
1804:. Retrieved
1800:
1791:
1773:
1761:. Retrieved
1757:
1748:
1737:
1694:
1688:
1678:
1666:
1661:
1649:. Retrieved
1645:
1633:
1575:NSSL Doppler
1528:
1414:
1389:
1355:
1353:Early 1980s.
1348:
1332:
1325:
1312:at Chicago.
1307:
1300:
1271:
1209:May 6, 1983
1193:
1161:Commissioned
1158:WSR-74S Site
920:
858:
807:May 7, 1996
802:
795:
774:August 1973
748:
713:
706:
699:
660:
649:
646:June 6, 1978
633:
617:
565:
549:
546:June 9, 1977
522:
508:
492:
467:Early 1980s
363:
309:Commissioned
306:WSR-74C Site
299:
283:
280:
272:
264:
252:
222:
207:
189:
188:urveillance
185:
181:
174:
173:
122:2° (WSR-74S)
1646:bldrdoc.gov
1375:Replaced a
1356:Replaced a
1333:Replaced a
1308:Replaced a
1272:Replaced a
1269:May 9, 1983
1223:Replaced a
977:April 1976
676:April 1977
1626:References
1010:June 1976
861:after 1982
445:Late 1977
127:Pulsewidth
68:68 WSR-74C
47:Introduced
1729:122880960
1721:0882-8156
1713:1520-0434
1590:CSU-CHILL
1503:AN/FPS-41
1493:AN/APS-2F
1488:AN/APQ-13
270:of 1970.
248:Australia
155:Precision
116:Beamwidth
85:Frequency
70:5 WSR-74S
1857:Category
1831:19 March
1806:19 March
1781:Archived
1763:19 March
1758:noaa.gov
1651:19 March
1595:OU-PRIME
1498:AN/CPS-9
1433:See also
714:Now the
582:March 10
145:Diameter
1826:nap.edu
1580:SMART-R
584:, 1997
235:History
218:WSR-88D
184:eather
52: (
1727:
1719:
1711:
1614:RaXPol
1524:WSR-57
1377:WSR-57
1358:WSR-57
1335:WSR-57
1310:WSR-57
1274:WSR-57
1225:WSR-57
276:NEXRAD
214:S band
210:C band
198:WSR-57
178:radars
175:WSR-74
140:579 km
96:C band
90:S band
20:WSR-74
1725:S2CID
1709:eISSN
1667:Radar
1642:(PDF)
1560:ARMOR
1555:ADRAD
1056:1976
1021:1976
925:1984
910:1977
867:1977
738:1976
716:ARMOR
704:1977.
592:1977
227:(see
180:were
163:Power
137:Range
65:built
1833:2015
1808:2015
1765:2015
1717:ISSN
1653:2015
1604:NSSL
1565:CASA
1539:TDWR
75:Type
54:1974
50:1974
1699:doi
1602:at
1570:DOW
1467:US
231:).
104:PRF
63:No.
1859::
1824:.
1799:.
1756:.
1723:.
1715:.
1707:.
1695:13
1693:.
1687:.
1644:.
1419:.
1379:.
1337:.
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1227:.
863:)
1835:.
1810:.
1767:.
1731:.
1701::
1673:.
1655:.
1460:e
1453:t
1446:v
190:R
186:S
182:W
98:)
92:)
56:)
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
