Knowledge (XXG)

Discoverer 2

Source ๐Ÿ“

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orbit and carried out vehicular performance and communications tests, successfully gathering data on propulsion, communications, orbital performance, and stabilization. All equipment functioned as programmed except the timing device. Satellite telemetry functioned until April 14, 1959, and the main tracking beacon functioned until April 21, 1959. The satellite bus reentered on 26 April 1959.
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spacecraft performance, including 28 environmental, 34 guidance and control, 18 second stage performance, 15 communications, and 9 reentry capsule parameters. Electrical power for all instruments was provided by NiCd batteries. Orientation was provided by a cold nitrogen gas jet-stream system, a scanner for pitch attitude, and an inertial reference package for yaw and roll data.
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With the aid of Norwegian troops, the Air Force mounted an intensive search for the SRV but was unable to find it, and the search was called off on April 22. At least one post-action memo reported evidence that Discoverer 2's capsule had fallen into the possession of the Soviet Union (ski tracks near
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The capsule was designed to be recovered by a specially equipped aircraft during parachute descent, but was also designed to float to permit recovery from the ocean. The main spacecraft contained a telemetry transmitter and a tracking beacon. The telemetry could transmit over 100 measurements of the
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spy satellite series. Discoverer 2 was the first satellite to be stabilized in orbit in all three axes and to be maneuvered on command from the earth. Though it carried no film and thus conducted no surveillance, Discoverer 2 was both the first satellite equipped with a reentry capsule and the first
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Though Norway was a Western ally and a member of NATO, the Soviet Union, which shared a border with the Scandinavian country, had a lease to operate several mining facilities on the island. The Air Force was thus vague when it announced that the Hawaiian capsule recovery had been canceled and that,
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The battery-powered Discoverer 2 was a cylindrical satellite 1.5 metres (4 ft 11 in) in diameter, 5.85 metres (19.2 ft) long and had a mass after second stage separation, including propellants, of roughly 3,800 kilograms (8,400 lb). After orbital insertion, the satellite and SRV
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Though the SRV recovery was a failure, Discoverer 2 was the first satellite to be stabilized in orbit in all three axes, to be maneuvered on command from the earth, to separate a reentry vehicle on command, and to send its reentry vehicle back to earth. The main instrumentation payload remained in
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Instead of a camera and film, Discoverer 2's recovery package included cosmic-ray film packs to determine the intensity and composition of cosmic radiation. This emulsion experiment comprised two groups of films arranged horizontally and vertically to measure the intensity and direction of cosmic
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booster, Discoverer 2 was three-axis stabilized and was commanded from Earth. After 17 orbits, on 14 April 1959, a reentry vehicle was ejected. The reentry vehicle separated into two sections, one consisting of the protection equipment, retrorocket and main structure and the other the reentry
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upper stage, which not only offered housing but whose engine provided attitude control in orbit. The KH-1 payload included the C (for Corona) single, vertical-looking, panoramic camera that scanned back and forth, exposing its film at a right angle to the line of flight. The camera, built by
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in surveilling the Sino-Soviet Bloc, determining the disposition and speed of production of Soviet missiles and long-range bombers assess. The Corona program was also used to produce maps and charts for the Department of Defense and other US government mapping programs.
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the impact zone), which could have provided limited intelligence to the Soviet government. This memo has been disputed, and the fate of Discovery 2's SRV remained unknown as of 1998. The incident became the basis for the book and movie
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capsule. It was planned that the capsule would reenter over the vicinity of Hawaii for recovery, but a timer malfunction caused by human programming error lead to premature capsule ejection and reentry near the Norwegian island of
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with a f/5.0 aperture and 61 centimetres (24 in) focal length, had a ground resolution of 12.9 metres (42 ft). Film was returned from orbit by a single General Electric Satellite Return Vehicle (SRV) constructed by
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radiation and to distinguish among electrons, protons, and heavier charged particles. A metallic Bismuth detector was designed to register induced changes in its sensors from which changes in
663: 494:. The SRV was equipped with an onboard small solid-fuel retro motor to deorbit at the end of the mission. Recovery of the capsule was done in mid-air by a specially equipped aircraft. 2779: 440:, Norway, rather than Hawaii. A joint US-Norway recovery operation was mounted, but was unsuccessful, and there was fear that the capsule ended in the possession of the 2985: 670: 520: 2772: 2980: 947: 497:
Discoverer 2 was the second in a series of three camera-less test flights preceding operational KH-1 flights. Its immediate predecessor,
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In addition, the spacecraft carried test life support equipment and a "mechanical mouse," a small biomedical payload.
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to return a payload from orbit. A timing error caused the reentry capsule to land near the island of
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Payloads are separated by bullets ( ยท ), launches by pipes ( | ). Crewed flights are indicated in
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The first series of Corona satellites were the Keyhole 1 (KH-1) satellites based on the
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launched on 13 April 1959 at 21:18:39 GMT, the second of three test flights of the
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could be derived to prevent overexposure in later, photographic missions.
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together massed 784 kilograms (1,728 lb) after orbit insertion.
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and achieved its first fully successful flight with the mission of
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CORONA began operational flights on 25 Jun 1959 with the launch of
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into a 239 kilometres (149 mi) x 346 kilometres (215 mi)
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satellite photo-reconnaissance series of satellites managed by the
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Discoverer 2 environmental chamber inserted into recovery capsule
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instead, the SRV would be picked up somewhere in "the arctic."
456:"Discoverer" was the civilian designation and cover for the 788:. Washington and London: Smithsonian Institution Press. 784:
Day, Dwayne A.; Logsdon, John M.; Latell, Brian (1998).
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Eye in the Sky: The Story of the Corona Spy Satellites
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784 kilograms (1,728 lb) after orbital insertion
2628: 2611: 2500: 2325: 2204: 2197: 1996: 1970: 1899: 1799: 1528: 1387: 1380: 1324: 1278: 1217: 669:. Central Intelligence Agency. 1995. Archived from 366: 356: 346: 336: 326: 316: 306: 296: 291: 271: 263: 248: 233: 228: 210: 198: 182: 177: 161: 151: 139: 129: 124: 108: 95: 74: 66: 52: 44: 865:A History of Satellite Reconnaissance, Volume 1 716: 714: 560:Launched on 13 April 1959 at 21:18:39 GMT from 2959:. Uncatalogued launch failures are listed in 2773: 1197: 941: 644:. NASA Space Science Data Coordinated Archive 8: 26: 664:"Corona: America's First Satellite Program" 2780: 2766: 2758: 2201: 1384: 1204: 1190: 1182: 948: 934: 926: 86: 32: 25: 636: 634: 632: 630: 628: 626: 624: 620: 779: 777: 775: 773: 771: 769: 767: 765: 763: 7: 2986:Spacecraft which reentered in 1959 871:. National Reconnaissance Office. 14: 462:Advanced Research Projects Agency 16:American reconnaissance satellite 912: 532:Discoverer 2 nosecone attachment 516:with Discoverer 2, 13 April 1959 487:Fairchild Camera and Instrument 98: 1: 862:Robert Perry (October 1973). 342:346 kilometers (215 mi) 332:239 kilometers (149 mi) 2981:Spacecraft launched in 1959 3002: 1163: 18: 2953: 2812: 2719: 1159: 961: 894:. Jonathon's Space Report 821:. Jonathon's Space Report 723:"Discoverer 2, 3, 12, 13" 380: 376: 287: 283: 224: 220: 173: 169: 120: 116: 40: 31: 429:reconnaissance satellite 427:was an American optical 19:Not to be confused with 2737:Enhanced Imaging System 402:Corona KH-1 Test Series 533: 525: 517: 372:13 April 1959 21:21:00 190:1959-04-13UTC21:18:39Z 186:13 April 1959 21:18:39 48:Optical reconnaissance 956:Discoverer satellites 841:"My country and NATO" 748:. Gunter's Space Page 725:. Gunter's Space Page 699:. Gunter's Space Page 531: 523: 512: 466:Department of Defense 297:Reference system 125:Spacecraft properties 2796:Orbital launches in 890:McDowell, Jonathan. 817:McDowell, Jonathan. 562:Vandenberg LC 75-3-4 215:Vandenberg LC 75-3-4 1212:Key Hole satellites 892:"Satellite Catalog" 267:13 April 1959 (SRV) 134:CORONA Test Vehicle 67:Harvard designation 28: 1166:CORONA (satellite) 920:Spaceflight portal 534: 526: 518: 292:Orbital parameters 203:Thor DM-21 Agena-A 2968: 2967: 2755: 2754: 2496: 2495: 1895: 1894: 1179: 1178: 588:Ice Station Zebra 446:Ice Station Zebra 422: 421: 2993: 2843:Unnamed, Unnamed 2801: 2800: 2799: 2782: 2775: 2768: 2759: 2202: 1385: 1206: 1199: 1192: 1183: 950: 943: 936: 927: 922: 917: 916: 915: 904: 903: 901: 899: 887: 881: 880: 870: 859: 853: 852: 850: 848: 837: 831: 830: 828: 826: 814: 808: 807: 781: 758: 757: 755: 753: 741: 735: 734: 732: 730: 718: 709: 708: 706: 704: 692: 686: 685: 683: 681: 676:on June 12, 2007 675: 668: 660: 654: 653: 651: 649: 638: 492:General Electric 328:Perigee altitude 259: 257: 244: 242: 193: 191: 178:Start of mission 109:Mission duration 100: 91: 90: 84: 36: 29: 3001: 3000: 2996: 2995: 2994: 2992: 2991: 2990: 2971: 2970: 2969: 2964: 2949: 2808: 2807: 2797: 2795: 2794: 2792: 2786: 2756: 2751: 2715: 2624: 2607: 2492: 2321: 2193: 1992: 1966: 1891: 1795: 1524: 1376: 1320: 1274: 1213: 1210: 1180: 1175: 1172: 1155: 957: 954: 918: 913: 911: 908: 907: 897: 895: 889: 888: 884: 868: 861: 860: 856: 846: 844: 839: 838: 834: 824: 822: 816: 815: 811: 796: 783: 782: 761: 751: 749: 744:Krebs, Gunter. 743: 742: 738: 728: 726: 721:Krebs, Gunter. 720: 719: 712: 702: 700: 695:Krebs, Gunter. 694: 693: 689: 679: 677: 673: 666: 662: 661: 657: 647: 645: 640: 639: 622: 617: 601: 558: 543:neutral density 507: 454: 418: 417: 411: 404: 399: 398: 392: 385: 338:Apogee altitude 255: 253: 240: 238: 205: 189: 187: 130:Spacecraft type 85: 80: 24: 17: 12: 11: 5: 2999: 2997: 2989: 2988: 2983: 2973: 2972: 2966: 2965: 2954: 2951: 2950: 2948: 2947: 2940: 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1483: 1481: 1478: 1476: 1473: 1471: 1468: 1466: 1463: 1461: 1458: 1456: 1453: 1451: 1448: 1446: 1443: 1441: 1438: 1436: 1433: 1431: 1428: 1426: 1423: 1421: 1418: 1416: 1413: 1411: 1408: 1406: 1403: 1401: 1398: 1396: 1395:Discoverer 38 1393: 1392: 1390: 1386: 1383: 1381:KH-4 Corona-M 1379: 1373: 1372:Discoverer 37 1370: 1368: 1367:Discoverer 36 1365: 1363: 1362:Discoverer 35 1360: 1358: 1357:Discoverer 34 1355: 1353: 1352:Discoverer 33 1350: 1348: 1347:Discoverer 32 1345: 1343: 1342:Discoverer 31 1340: 1338: 1337:Discoverer 30 1335: 1333: 1332:Discoverer 29 1330: 1329: 1327: 1323: 1317: 1316:Discoverer 28 1314: 1312: 1311:Discoverer 26 1309: 1307: 1306:Discoverer 25 1304: 1302: 1301:Discoverer 22 1299: 1297: 1296:Discoverer 18 1294: 1292: 1291:Discoverer 17 1289: 1287: 1286:Discoverer 16 1284: 1283: 1281: 1277: 1271: 1270:Discoverer 15 1268: 1266: 1265:Discoverer 14 1263: 1261: 1260:Discoverer 11 1258: 1256: 1255:Discoverer 10 1253: 1251: 1248: 1246: 1243: 1241: 1238: 1236: 1233: 1231: 1228: 1226: 1223: 1222: 1220: 1216: 1207: 1202: 1200: 1195: 1193: 1188: 1187: 1184: 1171: 1167: 1162: 1161: 1158: 1152: 1149: 1147: 1144: 1142: 1139: 1137: 1134: 1132: 1129: 1127: 1124: 1122: 1119: 1117: 1114: 1112: 1109: 1107: 1104: 1102: 1099: 1097: 1094: 1092: 1089: 1087: 1084: 1082: 1079: 1077: 1074: 1072: 1069: 1067: 1064: 1062: 1059: 1057: 1054: 1052: 1049: 1047: 1044: 1042: 1039: 1037: 1034: 1032: 1029: 1027: 1024: 1022: 1019: 1017: 1014: 1012: 1009: 1007: 1004: 1002: 999: 997: 994: 992: 989: 987: 984: 982: 979: 977: 974: 972: 969: 967: 964: 963: 960: 951: 946: 944: 939: 937: 932: 931: 928: 921: 910: 893: 886: 883: 878: 874: 867: 866: 858: 855: 842: 836: 833: 820: 813: 810: 805: 801: 797: 795:1-56098-830-4 791: 787: 780: 778: 776: 774: 772: 770: 768: 766: 764: 760: 747: 740: 737: 724: 717: 715: 711: 698: 697:"KH-1 Corona" 691: 688: 672: 665: 659: 656: 643: 637: 635: 633: 631: 629: 627: 625: 621: 614: 612: 610: 609:Discoverer 14 606: 598: 596: 592: 590: 589: 582: 578: 576: 571: 567: 563: 555: 553: 549: 546: 544: 538: 530: 522: 515: 511: 504: 502: 500: 495: 493: 488: 483: 478: 475: 471: 467: 463: 459: 451: 449: 447: 443: 439: 434: 430: 426: 416: → 415: 410: 407:←  403: 397: → 396: 391: 388:←  384: 379: 375: 371: 369: 365: 362:90.40 minutes 361: 359: 355: 351: 349: 345: 341: 339: 335: 331: 329: 325: 321: 319: 315: 312: 309: 305: 302: 299: 295: 290: 286: 282: 278: 274: 270: 266: 262: 252:26 April 1959 251: 247: 237:14 April 1959 236: 232: 227: 223: 219: 216: 213: 209: 204: 201: 197: 185: 181: 176: 172: 168: 164: 160: 157: 154: 150: 147: 144: 142: 138: 135: 132: 128: 123: 119: 115: 111: 107: 103: 101: 94: 89: 83: 79: 77: 73: 69: 65: 62: 58: 55: 51: 47: 43: 39: 35: 30: 22: 21:Discoverer II 2960: 2956: 2942: 2938:Discoverer 8 2933:Discoverer 7 2910: 2901:Discoverer 6 2893: 2889:Discoverer 5 2878:Explorer S-1 2876: 2871:Discoverer 4 2869: 2862: 2855: 2850:Discoverer 3 2848: 2841: 2837:Discoverer 2 2836: 2827:Discoverer 1 2612:KH-10 Dorian 2501:KH-9 Hexagon 1971:KH-6 Lanyard 1279:KH-2 Corona' 1250:Discoverer 9 1245:Discoverer 8 1240:Discoverer 7 1235:Discoverer 6 1230:Discoverer 5 1225:Discoverer 4 970: 896:. Retrieved 885: 864: 857: 845:. Retrieved 835: 823:. Retrieved 819:"Launch Log" 812: 785: 750:. Retrieved 739: 727:. Retrieved 701:. Retrieved 690: 678:. Retrieved 671:the original 658: 646:. Retrieved 605:Discoverer 4 602: 593: 586: 583: 579: 570:Thor-Agena A 559: 550: 547: 539: 535: 514:Thor Agena A 499:Discoverer 1 496: 479: 474:U-2 spyplane 455: 442:Soviet Union 425:Discoverer 2 424: 423: 414:Discoverer 3 409:Discoverer 1 395:Discoverer 3 390:Discoverer 1 318:Eccentricity 272:Landing site 264:Landing date 234:Last contact 152:Manufacturer 57:US Air Force 45:Mission type 27:Discoverer 2 2944:Pioneer P-3 2198:KH-8 Gambit 1997:KH-7 Gambit 1218:KH-1 Corona 575:Spitsbergen 566:polar orbit 438:Spitzbergen 433:Corona KH-1 348:Inclination 277:Spitzbergen 211:Launch site 183:Launch date 162:Launch mass 2975:Categories 2928:Explorer 7 2918:Vanguard 3 2912:Transit 1A 2884:Explorer 6 2822:Vanguard 2 1900:KH-5 Argon 1170:KH-5 Argon 1164:See also: 847:25 October 825:24 October 752:24 October 729:24 October 703:7 November 680:25 January 648:24 October 615:References 505:Spacecraft 452:Background 383:Discoverer 301:Geocentric 256:1959-04-27 249:Decay date 241:1959-04-15 206:(Thor 170) 2957:underline 2832:Pioneer 4 877:794229594 311:Low Earth 194: GMT 82:1959-003A 76:COSPAR ID 2895:Beacon 2 2723:See also 2656:OPS 9627 2651:OPS 3984 2646:OPS 2581 2641:OPS 4515 2636:OPS 5705 2621:(mockup) 2619:OPS 0855 2593:OPS 0721 2588:OPS 5642 2583:OPS 3123 2578:OPS 3854 2573:OPS 0460 2568:OPS 4800 2563:OPS 4699 2558:OPS 4428 2553:OPS 6381 2548:OPS 7122 2543:OPS 6245 2538:OPS 6630 2533:OPS 8261 2528:OPS 8410 2523:OPS 8314 2518:OPS 7293 2513:OPS 1737 2508:OPS 7809 2488:OPS 8424 2483:OPS 2925 2478:OPS 2849 2473:OPS 1166 2468:OPS 7164 2463:OPS 7471 2458:OPS 4915 2453:OPS 8533 2448:OPS 7600 2443:OPS 5499 2438:OPS 4883 2428:OPS 1776 2423:OPS 6889 2418:OPS 6275 2413:OPS 4018 2408:OPS 2093 2403:OPS 3978 2398:OPS 8888 2393:OPS 6574 2388:OPS 1678 2383:OPS 7616 2378:OPS 8607 2373:OPS 7899 2368:OPS 7776 2363:OPS 7568 2358:OPS 7874 2353:OPS 6820 2348:OPS 2863 2343:OPS 6531 2338:OPS 8455 2333:OPS 7807 2317:OPS 1077 2312:OPS 5310 2307:OPS 4248 2302:OPS 7585 2297:OPS 6518 2292:OPS 5296 2287:OPS 5247 2282:OPS 5187 2277:OPS 5138 2272:OPS 5105 2267:OPS 5057 2262:OPS 5028 2257:OPS 5000 2252:OPS 4995 2247:OPS 4941 2242:OPS 4886 2237:OPS 4282 2232:OPS 4243 2227:OPS 4204 2222:OPS 8968 2217:OPS 4096 2212:OPS 3401 2189:OPS 4360 2184:OPS 4321 2179:OPS 4399 2174:OPS 1890 2169:OPS 2070 2164:OPS 2055 2159:OPS 1686 2154:OPS 1832 2149:OPS 1850 2144:OPS 1577 2139:OPS 1950 2134:OPS 0910 2129:OPS 0879 2124:OPS 1184 2119:OPS 7253 2114:OPS 6232 2109:OPS 7208 2104:OPS 5698 2099:OPS 5810 2094:OPS 5501 2089:OPS 5236 2084:OPS 4983 2079:OPS 4920 2074:OPS 4703 2069:OPS 4439 2064:OPS 4384 2059:OPS 4036 2054:OPS 4262 2049:OPS 3802 2044:OPS 3684 2039:OPS 3592 2034:OPS 3743 2029:OPS 3435 2024:OPS 2423 2019:OPS 2372 2014:OPS 2196 2009:OPS 1947 2004:OPS 1467 1988:OPS 1370 1983:OPS 0924 1978:OPS 0627 1962:OPS 3236 1957:OPS 2739 1952:OPS 2437 1947:OPS 1561 1942:OPS 1008 1937:FTV-1134 1932:FTV-1132 1927:FTV-1126 1887:OPS 6371 1882:OPS 5640 1877:OPS 5454 1872:OPS 5300 1867:OPS 3297 1862:OPS 4992 1857:OPS 4324 1852:OPS 4720 1847:OPS 0440 1842:OPS 6617 1837:OPS 3654 1832:OPS 3890 1827:OPS 1315 1822:OPS 5955 1817:OPS 1419 1812:OPS 1001 1807:OPS 5089 1791:OPS 3531 1786:OPS 1101 1781:OPS 3722 1776:OPS 4740 1771:OPS 0165 1766:OPS 5343 1761:OPS 4849 1756:OPS 2243 1751:OPS 0562 1746:OPS 4827 1741:OPS 3559 1736:OPS 4696 1731:OPS 4779 1726:OPS 4750 1721:OPS 1664 1716:OPS 1866 1711:OPS 1545 1706:OPS 1703 1701:OPS 1599 1696:OPS 1778 1691:OPS 1508 1686:OPS 1612 1681:OPS 3488 1676:OPS 7291 1671:OPS 4639 1666:OPS 7249 1661:OPS 2155 1656:OPS 5325 1651:OPS 7221 1646:OPS 7208 1641:OPS 5543 1636:OPS 8431 1631:OPS 8425 1626:OPS 5023 1621:OPS 4803 1616:OPS 4782 1611:OPS 3928 1606:OPS 3358 1601:OPS 3360 1596:OPS 5434 1591:OPS 3559 1586:OPS 3333 1581:OPS 3497 1576:OPS 3042 1571:OPS 3491 1566:OPS 3754 1561:OPS 3483 1556:OPS 2921 1551:OPS 3444 1546:OPS 3467 1541:OPS 1353 1536:OPS 1419 1520:OPS 1388 1515:OPS 2260 1510:OPS 2268 1505:OPS 1266 1500:OPS 0999 1495:OPS 0954 1490:OPS 0720 1485:OPS 0583 1480:OPS 0048 1475:FTV-1156 1470:FTV-1155 1465:FTV-1135 1460:FTV-1136 1455:FTV-1154 1450:FTV-1153 1445:FTV-1133 1440:FTV-1152 1435:FTV-1131 1430:FTV-1130 1425:FTV-1151 1420:FTV-1129 1415:FTV-1127 1410:FTV-1128 1405:FTV-1125 1400:FTV-1124 804:36783934 468:and the 156:Lockheed 70:1959 GAM 53:Operator 2961:italics 2747:USA-144 2711:USA-245 2706:USA-224 2701:USA-186 2696:USA-161 2691:USA-129 2686:USA-116 2433:OPS 304 898:9 April 556:Mission 482:Agena-A 464:of the 322:0.00801 254: ( 239: ( 188: ( 146:Agena-A 97:SATCAT 2923:Luna 3 2906:Luna 2 2817:Mechta 2805:1960 โ†’ 2790:โ† 1958 2742:USA-53 2681:USA-86 2676:USA-33 2671:USA-27 875:  843:. NATO 802:  792:  599:Legacy 458:Corona 358:Period 307:Regime 199:Rocket 104:S00014 2732:Misty 2727:KH-12 2666:#2101 2661:USA-6 2603:#1220 2598:USA-2 2326:KH-8A 1800:KH-4B 1529:KH-4A 869:(PDF) 674:(PDF) 667:(PDF) 568:by a 368:Epoch 352:89.9ยฐ 279:(SRV) 275:Over 112:1 day 2798:1959 2205:KH-8 1388:KH-4 1168:and 900:2020 873:OCLC 849:2020 827:2020 800:OCLC 790:ISBN 754:2020 731:2020 705:2020 682:2020 650:2020 141:Bus 99:no. 61:NRO 2977:: 1151:38 1146:37 1141:36 1136:35 1131:34 1126:33 1121:32 1116:31 1111:30 1106:29 1101:28 1096:27 1091:26 1086:25 1081:24 1076:23 1071:22 1066:21 1061:20 1056:19 1051:18 1046:17 1041:16 1036:15 1031:14 1026:13 1021:12 1016:11 1011:10 798:. 762:^ 713:^ 623:^ 591:. 448:. 59:/ 2781:e 2774:t 2767:v 1205:e 1198:t 1191:v 1006:9 1001:8 996:7 991:6 986:5 981:4 976:3 971:2 966:1 949:e 942:t 935:v 902:. 879:. 851:. 829:. 806:. 756:. 733:. 707:. 684:. 652:. 258:) 243:) 192:) 23:.

Index

Discoverer II

US Air Force
NRO
COSPAR ID
1959-003A
Edit this at Wikidata
SATCAT no.
CORONA Test Vehicle
Bus
Agena-A
Lockheed
Thor DM-21 Agena-A
Vandenberg LC 75-3-4
Spitzbergen
Geocentric
Low Earth
Eccentricity
Perigee altitude
Apogee altitude
Inclination
Period
Epoch
Discoverer
Discoverer 1
Discoverer 3
Corona KH-1 Test Series
Discoverer 1
Discoverer 3
reconnaissance satellite

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