385:(OA) design, and improved logistics processes while reducing lifecycle cost. It only affects the layout of the below-deck units. The plan is to back-fit the existing AN/SPS-48E population from 2011 through 2020, with the SPS-48G units. They will support fleet 3D air search requirements through 2050 and beyond for the ship classes that have SPS-48G. The earlier 1st and 2nd stage RF amplifiers are replaced with a solid state transmitter and the receiver, processor, and Auxiliary Detection Processor, formerly housed in individual equipment cabinets, are combined into a single cabinet. The number of
27:
362:
comparisons and to identify and save blips that seemed to persist near the same location. This processor also built clutter maps on each 360-degree scan and looked for changes in the map, which it saved as possible targets. These blips and clutter changes that may be possible targets were sent to the NTDS, which did further comparisons to determine which ones had motions characteristic of a ship or airplane. This system would go to sea for operational evaluation in 1967 and be incorporated into the
475:
397:(COTS) radar processor's computing capabilities will be sustained through a planned tech-refresh program. More intuitive and interactive built-in-test and embedded maintenance and operator training makes available all radar technical, engineering, and logistics data and allows remote monitoring and distance support, while ensuring accurate and timely configuration management.
149:
242:
According to ITT Exelis, the system has a range exceeding 200 nmi (370 km) and can track targets up to 69 degrees in elevation. The AN/SPS-48E is capable of providing target range, bearing and altitude information using a frequency-scanning antenna using a range of different frequencies in
518:
AN/SPS-48G - some new-build, others upgraded AN/SPS-48E under the Radar
Obsolescence, Availability Recovery (ROAR) program. 29 radars are being modernized at a cost of $ 169.3 million under contract N00024-09-C-5395. Replacing below-decks units with modern electronics based on open architecture will
272:
Development of the SPS-48 in particular started in 1960 in response to shortcomings of the AN/SPS-39. A development contract for two service models (XN-1 and XN-2) was awarded in June 1960. XN-1 completed system testing in April 1962 and was operated until
December 1962 to collect reliability data
264:
Technical and
Operational Requirements, written in 1956, called for two radar systems: a three-dimensional search radar with a range of more than 200 miles that can turn over targets to missile and gun radars, and a two-dimensional long-range search radar able to detect relatively small targets at
511:
AN/SPS-48E - Compared to the C variant, the SPS-48E has twice the radiated power, increased receiver sensitivity, four stage solid-state transmitter, half the components of a -48C and built-in testing for easier diagnostics. Originally developed as part of the New Threat
Upgrade (NTU) Program to
372:
The AN/SPS-48E was first introduced 1987. The component count was reduced compared to the -48C (126,000 versus 280,000) and Built-In Test (BIT) capabilities were added, reducing the MTBF and manpower requirements. Performance improvements included improved resistance to jamming and ECM, better
361:
The AN/SPS-48C added
Automatic Detection and Tracking to the AN/SPS-48 system. The first prototype with ADT capability was manufactured by Gilfillan for evaluation at Mare Island mid-1964. It contained a special-purpose "pipeline processor" that had large amounts of memory for scan-to-scan
228:. The range of the target is also identified due to the time it takes the beam to go out and back to the receiver. What makes this radar system different is its ability to detect the height of the target above the surface of the water. With these three pieces of data the radar's
292:
between March and June 1965 for reliability testing by the
Operational Test and Evaluation Force. Testing results were positive, and the AN/SPS-48 was formally approved for service use by the Chief of Naval Operations on 21 February 1966. The AN/SPS-48 replaced AN/SPS-39 on the
251:
with three power modes: high, medium and low. SPS-48 radars stack multiple beams in a train of pulses at different frequencies. The beams scan different elevation areas, allowing the stack to cover up to 69 degrees of elevation.
437:
B/D radars are electronically scanned phased arrays, while the SPS-48E is frequency scanned in elevation, and mounted on a rotating joint that spins the radar in azimuth. The AN/SPS-48 is carried by US Navy ships such as
373:
detection of smaller targets and targets on the horizon, high-angle tracking, and the ability to accept and execute commands from external air defense or shipboard combat systems. It was included as part of the
380:
The AN/SPS-48G program addresses problems of long-term obsolescence through a system redesign that improves the radar's reliability, maintainability, and supportability through technology improvements,
314:
Moving Target
Indicator (MTI) capability, needed to see targets in clutter and weather, was added to the SPS-48 radar system with the upgrade to the SPS-48A. This upgrade was first evaluated with the
616:
1049:
1044:
265:
ranges over 250 miles, which can hand targets to the three-dimensional radar once they enter its range. The former eventually became the AN/SPS-48; the latter became the
534:
987:
460:
572:
638:
1020:
239:
to cover elevation by varying the transmitter frequency. The 4,500 lb (2,000 kg) antenna is capable of rotating at 7.5 or 15 rpm.
453:
236:
446:
968:
903:
852:
775:
1002:
210:
301:
32:
937:
224:
A three-dimensional radar is mounted on a base that allows for 360 degrees of rotation. The target can be located at a given
439:
414:
216:. Existing sets are being modernized under the ROAR program to AN/SPS-48G standard for better reliability and usability.
333:
175:
26:
497:
AN/SPS-48C - -48A with
Automatic detection and tracking capability as well as Moving target indicator (MTI) capability.
992:
617:"Building the U.S. Navy's First Seagoing Digital System - Chapter 4 of the Story of the Naval Tactical Data System"
261:
424:
390:
576:
394:
341:
811:
736:
479:
213:
386:
363:
294:
201:
led to the decommissioning of many such ships, and many of these vessel's AN/SPS-48 sets were reused on
190:
877:
311:
classes between 1967 and 1975 under the Guided
Missile Frigate Anti-Air Warfare Modernization Program.
405:
With the air targets exact 3D location it is available for interception/removal via either the ship's
352:
326:
1039:
590:
539:
410:
306:
274:
501:
374:
315:
285:
474:
1016:
1008:
997:
964:
858:
848:
771:
382:
347:
destroyer, known in development as the DX, was designed with accommodations for replacing the
229:
206:
153:
823:
205:
and amphibious ships where it is used to direct targets for air defense systems such as the
202:
639:"Moving the Firing Key to NTDS - Chapter 6 of the Story of the Naval Tactical Data System"
791:
Terzibaschitsch, Stefan (1985). "The U.S. Navy's
Aircraft Carriers: A Pictorial Report".
235:
For the SPS-48 in particular, the antenna is mechanically rotated to scan azimuth, while
827:
529:
284:
A production contract of 13 radars was awarded in June 1963. Unit #6 was installed on
1033:
544:
406:
248:
244:
169:
78:
74:
48:
409:
or through linked weapons platforms located elsewhere. It is the predecessor of the
351:
B radar with the AN/SPS-48B for the DXG variant. This variant eventually became the
713:
358:
destroyer, though it is unclear if it received the SPS-48B variant in practice.
862:
186:
420:
348:
266:
878:"Coherent Data Collection and Analysis Capability for the AN/SPS-48E Radar"
434:
198:
194:
179:
902:
Quigley, Daniel; Walters, Lance; Caitlin, McInnes; Gorby, Christopher.
430:
225:
172:
111:
1013:
Dirty Little Secrets: Military Information You're Not Supposed To Know
842:
696:
When Computers Went to Sea: The Digitization of the United States Navy
661:
When Computers Went to Sea: The Digitization of the United States Navy
232:
has the ability to place the target in an X,Y,Z, 3 dimensional space.
148:
1003:
Fire Controlman Volume 02-Fire Control Radar Fundamentals (Revised)
812:"USS SPRUANCE (DD963) CLASS, DESIGNED FOR CHANGE—THE PAYOFF IS NOW"
182:
147:
494:
AN/SPS-48B - Unknown, possible non-existent or prototype for -48C
491:
AN/SPS-48A - Addition of Moving Target Indicator (MTI) to SPS-48
663:. Wiley-IEEE Computer Society Press. pp. 319–320, 340–341.
189:
and deployed in the 1960s as the primary air search sensor for
106:
17 ft (5.2 m) by 17 ft 6 in (5.33 m)
594:
575:. Naval Sea Systems Command. 24 October 2012. Archived from
273:
ashore. XN-2 was delivered July 1962 and installed aboard
707:
705:
547:
Radar of similar function used in some aircraft carriers.
31:
An SPS-48E radar antenna (the large square panel) aboard
961:
The Naval Institute Guide to World Naval Weapons Systems
698:. Wiley-IEEE Computer Society Press. pp. 319–320.
904:"The AN/SPS-48G Radar System Sustainability Upgrade"
844:
U.S. Destroyers : an illustrated design history
486:
showing an SPS-48 radar near the center of the image
393:
is improved over the AN/SPS-48E(V) by 104%. The new
512:
support the SM-2 Launch On Search (LOS) capability.
138:
128:
120:
110:
102:
94:
86:
70:
62:
54:
44:
681:Hard Charger! The Story of the USS Biddle (DLG-34)
500:AN/SPS-48D - Prototype version of -48E, tested on
325:The AN/SPS-48B is noted as being installed on the
535:List of military electronics of the United States
876:Roulette, Jay F.; Skrivseth, Kenneth A. (1997).
519:reduce training demands and improve reliability.
768:A Compendium of Armaments and Military Hardware
8:
19:
735:Cockell, Jr., William A. (1 January 1972).
593:. Exelisinc.com. 2011-10-27. Archived from
1050:Military equipment introduced in the 1960s
938:"Losing Out on Carrier Radar Improvements"
654:
652:
632:
630:
567:
565:
563:
561:
25:
18:
1045:Military electronics of the United States
718:Naval Ship Systems Command Technical News
674:
672:
670:
573:"United States Navy Factfile AN/SPS-48G"
515:AN/SPS-48E LBR Land based radar version.
473:
942:Proceedings of the U.S. Naval Institute
741:Proceedings of the U.S. Naval Institute
557:
591:"ITT Exelis - The Power of Ingenuity"
7:
712:Bailey, Donald C. (September 1966).
885:Johns Hopkins APL Technical Digest
828:10.1111/j.1559-3584.1975.tb03712.x
637:Boslaugh, David L. (13 Jan 2015).
615:Boslaugh, David L. (12 May 2021).
391:mean time between critical failure
132:690 ft (210 m) elevation
14:
694:Boslaugh, David L. (April 2003).
659:Boslaugh, David L. (April 2003).
464:-class amphibious transport docks
237:beams are electronically steered
193:warships. The deployment of the
936:Truver, Scott C. (April 1989).
810:Collins, John T. (April 1975).
457:-class amphibious assault ships
450:-class amphibious assault ships
332:aircraft carriers prior to the
98:100,000 ft (30,000 m)
1015:. HarperCollins. p. 210.
988:NAVAIR Warfighter encyclopedia
1:
714:"AN/SPS-48 Radar Development"
176:electronically scanned array
766:Chant, Christopher (2014).
679:Treadway, James A. (2005).
413:system currently in use on
1066:
281:for shipboard evaluation.
90:250 nmi (460 km)
963:. Naval Institute Press.
959:Friedman, Norman (1989).
24:
16:Radar used in the US Navy
443:-class aircraft carriers
395:commercial off-the-shelf
387:Lowest Replaceable Units
152:AN/SPS 48e on board the
816:Naval Engineers Journal
389:is reduced by 87%, and
185:system manufactured by
993:Manufacturer's website
487:
161:
45:Country of origin
793:Warship International
477:
151:
847:. pp. 374–377.
737:"Professional Notes"
540:Diffraction grating
197:and the end of the
21:
1009:Dunnigan, James F.
841:Friedman, Norman.
488:
375:New Threat Upgrade
162:
35:Theodore Roosevelt
1022:978-0-688-11270-7
383:open architecture
230:central processor
203:aircraft carriers
180:three-dimensional
146:
145:
1057:
1026:
975:
974:
956:
950:
949:
933:
927:
926:
924:
922:
908:
899:
893:
892:
882:
873:
867:
866:
838:
832:
831:
807:
801:
800:
788:
782:
781:
763:
757:
756:
754:
752:
732:
726:
725:
709:
700:
699:
691:
685:
684:
676:
665:
664:
656:
647:
646:
634:
625:
624:
612:
606:
605:
603:
602:
587:
581:
580:
569:
58:21 February 1966
29:
22:
1065:
1064:
1060:
1059:
1058:
1056:
1055:
1054:
1030:
1029:
1023:
1007:
984:
979:
978:
971:
958:
957:
953:
935:
934:
930:
920:
918:
906:
901:
900:
896:
880:
875:
874:
870:
855:
840:
839:
835:
809:
808:
804:
790:
789:
785:
778:
770:. p. 189.
765:
764:
760:
750:
748:
734:
733:
729:
711:
710:
703:
693:
692:
688:
678:
677:
668:
658:
657:
650:
636:
635:
628:
614:
613:
609:
600:
598:
589:
588:
584:
579:on 22 Jun 2018.
571:
570:
559:
554:
526:
472:
403:
367:-class cruisers
336:Abraham Lincoln
258:
222:
133:
81:
40:
17:
12:
11:
5:
1063:
1061:
1053:
1052:
1047:
1042:
1032:
1031:
1028:
1027:
1021:
1005:
1000:
998:FAS AN/SPS-48C
995:
990:
983:
982:External links
980:
977:
976:
969:
951:
928:
894:
868:
853:
833:
802:
783:
776:
758:
727:
701:
686:
666:
648:
626:
607:
582:
556:
555:
553:
550:
549:
548:
542:
537:
532:
530:List of radars
525:
522:
521:
520:
516:
513:
509:
506: (DDG-42)
498:
495:
492:
484: (DDG-39)
471:
468:
402:
399:
338: (CVN-72)
320: (DLG-34)
290: (DLG-18)
279: (DLG-15)
257:
254:
221:
218:
158: (CVN-76)
144:
143:
140:
136:
135:
130:
126:
125:
122:
118:
117:
114:
108:
107:
104:
100:
99:
96:
92:
91:
88:
84:
83:
72:
68:
67:
64:
60:
59:
56:
52:
51:
46:
42:
41:
37: (CVN-71)
30:
15:
13:
10:
9:
6:
4:
3:
2:
1062:
1051:
1048:
1046:
1043:
1041:
1038:
1037:
1035:
1024:
1018:
1014:
1010:
1006:
1004:
1001:
999:
996:
994:
991:
989:
986:
985:
981:
972:
970:9780870217937
966:
962:
955:
952:
947:
943:
939:
932:
929:
916:
912:
905:
898:
895:
891:(3): 388–397.
890:
886:
879:
872:
869:
864:
860:
856:
854:1-68247-757-6
850:
846:
845:
837:
834:
829:
825:
821:
817:
813:
806:
803:
798:
794:
787:
784:
779:
777:9781134646685
773:
769:
762:
759:
746:
742:
738:
731:
728:
723:
719:
715:
708:
706:
702:
697:
690:
687:
682:
675:
673:
671:
667:
662:
655:
653:
649:
644:
640:
633:
631:
627:
622:
618:
611:
608:
597:on 2013-03-02
596:
592:
586:
583:
578:
574:
568:
566:
564:
562:
558:
551:
546:
545:Selex RAN-40L
543:
541:
538:
536:
533:
531:
528:
527:
523:
517:
514:
510:
507:
505:
499:
496:
493:
490:
489:
485:
483:
476:
469:
467:
465:
463:
458:
456:
451:
449:
444:
442:
436:
432:
429:
427:
422:
419:
417:
416:Arleigh Burke
412:
408:
407:weapon system
400:
398:
396:
392:
388:
384:
378:
376:
370:
368:
366:
359:
357:
355:
350:
346:
344:
339:
337:
331:
329:
323:
321:
319:
312:
310:
309:
304:
303:
298:
297:
291:
289:
282:
280:
278:
270:
268:
263:
255:
253:
250:
246:
240:
238:
233:
231:
227:
219:
217:
215:
212:
208:
204:
200:
196:
192:
191:anti-aircraft
188:
184:
181:
178:, air search
177:
174:
171:
167:
159:
157:
156:Ronald Reagan
150:
141:
137:
131:
127:
123:
119:
115:
113:
109:
105:
101:
97:
93:
89:
85:
80:
76:
73:
69:
66:3D Air-search
65:
61:
57:
53:
50:
49:United States
47:
43:
38:
36:
28:
23:
1012:
960:
954:
945:
941:
931:
919:. Retrieved
917:(2): 104–109
914:
911:Leading Edge
910:
897:
888:
884:
871:
843:
836:
822:(2): 27–31.
819:
815:
805:
796:
792:
786:
767:
761:
749:. Retrieved
744:
740:
730:
721:
717:
695:
689:
680:
660:
642:
620:
610:
599:. Retrieved
595:the original
585:
577:the original
503:
481:
461:
454:
447:
440:
433:. The AEGIS
425:
415:
404:
379:
371:
364:
360:
353:
342:
335:
327:
324:
317:
313:
307:
300:
295:
287:
283:
276:
271:
259:
241:
234:
223:
214:SAM missiles
165:
163:
155:
134:1/6° azimuth
82:(2 to 4 GHz)
34:
921:13 February
751:13 February
724:(9): 16–18.
462:San Antonio
426:Ticonderoga
207:Sea Sparrow
142:35 kW (avg)
1040:Sea radars
1034:Categories
863:1250511698
601:2012-10-01
552:References
482:Macdonough
421:destroyers
187:ITT Exelis
55:Introduced
502:USS
480:USS
478:Masts of
369:by 1975.
349:AN/SPS-40
334:USS
322:in 1968.
316:USS
286:USS
275:USS
267:AN/SPS-49
220:Operation
166:AN/SPS-48
154:USS
129:Precision
121:Elevation
71:Frequency
33:USS
20:AN/SPS-48
1011:(1990).
799:(1): 43.
643:ethw.org
621:ethw.org
524:See also
470:Variants
435:AN/SPY-1
431:cruisers
343:Spruance
199:Cold War
195:AN/SPY-1
103:Diameter
95:Altitude
365:Belknap
296:Belknap
256:History
226:azimuth
211:RIM-116
112:Azimuth
1019:
967:
861:
851:
774:
455:Tarawa
441:Nimitz
428:-class
418:-class
356:-class
345:-class
340:. The
328:Nimitz
318:Biddle
302:Coontz
288:Worden
277:Preble
249:F band
245:E band
116:0-360°
79:F band
907:(PDF)
881:(PDF)
504:Mahan
411:AEGIS
330:class
308:Leahy
183:radar
173:naval
168:is a
139:Power
124:0-65°
87:Range
1017:ISBN
965:ISBN
948:(4).
923:2023
859:OCLC
849:ISBN
772:ISBN
753:2023
459:and
448:Wasp
423:and
401:Uses
354:Kidd
305:and
262:NTDS
260:The
247:and
209:and
164:The
77:and
63:Type
946:115
824:doi
747:(1)
1036::
944:.
940:.
913:.
909:.
889:18
887:.
883:.
857:.
820:87
818:.
814:.
797:22
795:.
745:98
743:.
739:.
722:15
720:.
716:.
704:^
669:^
651:^
641:.
629:^
619:.
560:^
466:.
452:,
445:,
377:.
299:,
269:.
170:US
1025:.
973:.
925:.
915:7
865:.
830:.
826::
780:.
755:.
683:.
645:.
623:.
604:.
508:.
160:.
75:E
39:.
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
