834:
52:
20:
2385:
2396:
750:
656:
380:
1499:
1469:
1439:
597:, at 36,000 km (22,000 mi), allows a satellite to hover over a constant spot on the earth since the orbital period at this altitude is 24 hours. This allows uninterrupted coverage of more than 1/3 of the Earth per satellite, so three satellites, spaced 120° apart, can cover the whole Earth. This type of orbit is mainly used for
974:
In order to improve harmonisation in spectrum utilisation, the majority of service-allocations stipulated in this document were incorporated in national Tables of
Frequency Allocations and Utilisations which is with-in the responsibility of the appropriate national administration. The allocation
764:
by detecting changes in the Earth's vegetation, atmospheric trace gas content, sea state, ocean color, and ice fields. By monitoring vegetation changes over time, droughts can be monitored by comparing the current vegetation state to its long term average. For example, the 2002 oil spill off the
507:
In 2008, more than 150 Earth observation satellites were in orbit, recording data with both passive and active sensors and acquiring more than 10 terabits of data daily. By 2021, that total had grown to over 950, with the largest number of satellites operated by US-based company
792:
orbits. A Sun-synchronous orbit passes over each spot on the ground at the same time of day, so that observations from each pass can be more easily compared, since the Sun is in the same spot in each observation. A
519:
observation satellites carry instruments that should be operated at a relatively low altitude. Most orbit at altitudes above 500 to 600 kilometers (310 to 370 mi). Lower orbits have significant
773:, which, though not a weather satellite, flies an instrument (ASAR) which can see changes in the sea surface. Anthropogenic emissions can be monitored by evaluating data of tropospheric NO
1396:
630:) and discussed communication between them and the ground using radio, but fell short of the idea of using satellites for mass broadcasting and as telecommunications relays.
887:
information relating to the characteristics of the Earth and its natural phenomena, including data relating to the state of the environment, is obtained from passive or
582:
is used. A low orbit will have an orbital period of roughly 100 minutes and the Earth will rotate around its polar axis about 25° between successive orbits. The
2101:
1122:
559:
spacecraft of
European Space Agency are observing the Earth from an altitude of about 700 km (430 mi). The Earth observation satellites of UAE,
1642:
492:, for NASA's Jet Propulsion Laboratory on January 31, 1958. The information sent back from its radiation detector led to the discovery of the Earth's
408:
1558:
1012:
1404:
361:
1271:
Kuznetsov, V.D.; Sinelnikov, V.M.; Alpert, S.N. (June 2015). "Yakov Alpert: Sputnik-1 and the first satellite ionospheric experiment".
556:
1107:
501:
1188:
2079:
1669:
618:
explored the idea of using orbiting spacecraft for detailed peaceful and military observation of the ground in his 1928 book,
2420:
1659:
1594:
1567:
1541:
ITU Radio
Regulations, CHAPTER II – Frequencies, ARTICLE 5 Frequency allocations, Section IV – Table of Frequency Allocations
1101:
848:
366:
586:
moves towards the west 25° each orbit, allowing a different section of the globe to be scanned with each orbit. Most are in
1148:
1459:
1429:
1679:
1489:
650:
1699:
1173:
528:
401:
356:
24:
989:
However, military usage, in bands where there is civil usage, will be in accordance with the ITU Radio
Regulations.
1133:
953:
1568:
The TIROS I and II Ground
Control Station where the first Earth Observing Satellite (TIROS I) sent it first photos
1346:
622:. He described how the special conditions of space could be useful for scientific experiments. The book described
1854:
1371:
484:, by the Soviet Union on October 4, 1957. Sputnik 1 sent back radio signals, which scientists used to study the
2229:
2091:
1674:
480:
The first occurrence of satellite remote sensing can be dated to the launch of the first artificial satellite,
1795:
394:
2425:
2207:
2043:
1637:
85:
1143:
2430:
2279:
2048:
1721:
872:
754:
328:
1168:
2202:
2084:
1822:
1587:
1112:
108:
504:(TIROS) program, sent back the first television footage of weather patterns to be taken from space.
2317:
1817:
1805:
1777:
1183:
802:
761:
493:
446:
283:
115:
95:
2321:
2257:
2036:
1938:
1849:
1753:
1726:
1627:
1555:
940:
934:
318:
80:
2369:
2331:
1765:
1684:
1622:
1163:
1127:
627:
474:
300:
287:
90:
70:
63:
722:
flows, etc., are other types of environmental information collected using weather satellites.
2219:
2026:
1664:
864:
785:
587:
536:
1530:
earth exploration-satellite service / earth exploration-satellite radiocommunication service
2388:
2289:
2272:
1909:
1844:
1837:
1694:
1580:
1306:
1280:
994:
338:
140:
35:
1528:
ITU Radio
Regulations, Section IV. Radio Stations and Systems – Article 1.51, definition:
8:
2284:
2262:
2197:
1916:
1760:
1197:
880:
594:
488:. The United States Army Ballistic Missile Agency launched the first American satellite,
333:
323:
222:
1284:
833:
2399:
2182:
2108:
1963:
1859:
1711:
1248:
1223:
798:
610:
384:
179:
145:
135:
615:
2395:
2354:
1994:
1889:
1864:
1810:
1800:
1617:
1456:
1253:
1158:
1117:
644:
598:
572:
466:
434:
213:
125:
2267:
2096:
2053:
2019:
1984:
1921:
1874:
1716:
1288:
1243:
1235:
979:
primary allocation: is indicated by writing in capital letters (see example below)
797:
orbit is the closest possible orbit to a circular orbit that is undisturbed by the
726:
247:
196:
51:
901:
such information may be distributed to earth stations within the system concerned;
2312:
2212:
2165:
2063:
2004:
1989:
1943:
1926:
1832:
1827:
1562:
1493:
1433:
1153:
568:
462:
295:
150:
1516:
985:
exclusive or shared utilization: is within the responsibility of administrations
2359:
2346:
2239:
2170:
2160:
2145:
2123:
2113:
2009:
1999:
1948:
1869:
520:
470:
290:
1292:
2414:
2307:
2224:
2155:
2118:
1958:
1879:
1743:
1738:
1503:
1473:
1463:
1443:
1426:
1178:
927:
876:
715:
699:
663:
623:
442:
237:
232:
227:
155:
130:
1486:
2364:
2299:
1968:
1953:
1654:
1649:
1332:
1257:
794:
789:
583:
266:
725:
Weather satellite images helped in monitoring the volcanic ash cloud from
2192:
2058:
1748:
1731:
1603:
1457:
NOAA Satellites, Scientists
Monitor Mt. St. Helens for Possible Eruption.
579:
509:
454:
450:
191:
43:
19:
1333:"How many Earth observation satellites are orbiting the planet in 2021?"
1239:
898:
similar information is collected from airborne or Earth-based platforms;
2326:
2234:
2177:
2137:
1931:
1632:
1517:
The use of multi-beam
Radarsat-1 satellite imagery for terrain mapping.
908:
This service may also include feeder links necessary for its operation.
892:
822:
818:
730:
703:
564:
560:
489:
485:
278:
242:
168:
75:
1375:
1350:
753:
Composite satellite image of the Earth, showing its entire surface in
547:
are all operated at altitudes of about 800 km (500 mi). The
2336:
2187:
1904:
1785:
1706:
1689:
817:
Terrain can be mapped from space with the use of satellites, such as
695:
671:
481:
430:
273:
186:
837:
806:
749:
734:
544:
655:
1502:
This article incorporates text from this source, which is in the
1472:
This article incorporates text from this source, which is in the
1442:
This article incorporates text from this source, which is in the
1138:
770:
679:
675:
552:
532:
524:
497:
2150:
2014:
719:
659:
1572:
1025:
401-402 MHz METEOROLOGICAL AIDS
1079:
Standard frequency and time signal-satellite (Earth-to-space)
967:
The allocation of radio frequencies is provided according to
888:
766:
687:
683:
548:
540:
516:
438:
883:, which may include links between space stations, in which:
738:
707:
691:
16:
Satellite specifically designed to observe Earth from orbit
1130:- a NASA program comprising a series of satellite missions
686:. These meteorological satellites, however, see more than
2031:
1270:
1222:
Tatem, Andrew J.; Goetz, Scott J.; Hay, Simon I. (2008).
711:
500:
spacecraft, launched on April 1, 1960, as part of NASA's
733:. Smoke from fires in the western United States such as
445:
and similar ones intended for non-military uses such as
857:
Earth exploration-satellite radiocommunication service
527:
maneuvers necessary. The Earth observation satellites
1123:
Earth observation satellites transmission frequencies
975:
might be primary, secondary, exclusive, and shared.
982:
secondary allocation: is indicated by small letters
1374:. Mohammed Bin Rashid Space Centre. Archived from
1349:. Mohammed Bin Rashid Space Centre. Archived from
801:, gravitational attraction from the Sun and Moon,
2412:
1372:"DubaiSat-1, Earth Observation Satellite of UAE"
1347:"DubaiSat-2, Earth Observation Satellite of UAE"
23:Six Earth observation satellites comprising the
784:These types of satellites are almost always in
1003:
1588:
1224:"Fifty Years of Earth-observation Satellites"
1221:
1039:EARTH EXPLORATION-SATELLITE (Earth-to-space)
971:of the ITU Radio Regulations (edition 2012).
402:
828:
50:
744:
578:To get global coverage with a low orbit, a
1595:
1581:
760:Other environmental satellites can assist
729:and activity from other volcanoes such as
409:
395:
1247:
1108:Committee on Earth Observation Satellites
1041:METEOROLOGICAL-SATELLITE (Earth-to-space)
502:Television Infrared Observation Satellite
1264:
1189:Interferometric synthetic-aperture radar
1004:
832:
748:
654:
18:
2080:Effect of spaceflight on the human body
1217:
1215:
1213:
962:
904:platform interrogation may be included.
2413:
2102:Psychological and sociological effects
769:was watched carefully by the European
674:that is primarily used to monitor the
1576:
1419:
849:International Telecommunication Union
473:without forming pictures, such as in
457:and others. The most common type are
1313:. New Mexico Museum of Space History
1299:
1210:
1149:List of Earth observation satellites
1062:EARTH EXPLORATION-SATELLITE (active)
948:Earth exploration-satellite service
853:Earth exploration-satellite service
27:satellite constellation as of 2014.
13:
1811:Weather and environment monitoring
1403:. 2 September 2016. Archived from
841:Earth exploration-satellite system
651:Satellite temperature measurements
14:
2442:
1549:
1174:Radar earth observation satellite
1045:Mobile except aeronautical mobile
1037:SPACE OPERATION (space-to-Earth)
921:is classified in accordance with
912:
670:A weather satellite is a type of
626:satellites (first put forward by
469:; some EO satellites may perform
2394:
2384:
2383:
1497:
1467:
1437:
1134:First images of Earth from space
1060:13.4-13.75 GHz
954:Meteorological-satellite service
690:and cloud systems. City lights,
378:
1855:Space launch market competition
1602:
1534:
1522:
1509:
1479:
1169:Microwave radiometer#Spaceborne
633:
575:of various parts of the Earth.
2092:Health threat from cosmic rays
1449:
1389:
1364:
1339:
1325:
427:Earth remote sensing satellite
1:
1203:
611:Remote sensing § History
523:, which makes frequent orbit
2421:Earth observation satellites
1102:Earth observation satellites
1010:
7:
2208:Self-replicating spacecraft
2044:International Space Station
1397:"Introduction to satellite"
1095:
843:in action around the Earth.
620:The Problem of Space Travel
571:(LEO) orbits and providing
423:Earth observation satellite
351:List of space organizations
10:
2447:
1722:Space Liability Convention
1273:Advances in Space Research
1099:
919:radiocommunication service
873:radiocommunication service
812:
755:equirectangular projection
741:have also been monitored.
648:
642:
638:
608:
604:
2378:
2345:
2298:
2250:
2136:
2085:Space adaptation syndrome
2072:
1977:
1897:
1888:
1776:
1610:
1496:Retrieved on 4 July 2008
1466:Retrieved on 4 July 2008
1436:Retrieved on 4 July 2008
1293:10.1016/j.asr.2015.02.033
1113:Data collection satellite
1059:
1024:
829:International regulations
599:meteorological satellites
494:Van Allen radiation belts
1818:Communications satellite
1519:Retrieved on 4 July 2008
1184:Synthetic-aperture radar
925:(article 1) as follows:
803:solar radiation pressure
762:environmental monitoring
745:Environmental monitoring
459:Earth imaging satellites
447:environmental monitoring
2322:reusable launch systems
1939:Extravehicular activity
1850:Commercial use of space
1754:Militarisation of space
1727:Registration Convention
1643:Accidents and incidents
941:Inter-satellite service
935:Fixed-satellite service
799:oblateness of the Earth
714:mapping, boundaries of
81:Timeline of spaceflight
2370:Mission control center
2332:Non-rocket spacelaunch
1766:Billionaire space race
1492:19 August 2008 at the
1164:GNSS radio occultation
1128:Earth Observing System
1006:Allocation to services
910:
844:
757:
667:
628:Konstantin Tsiolkovsky
588:Sun-synchronous orbits
475:GNSS radio occultation
385:Spaceflight portal
301:Non-rocket spacelaunch
71:History of spaceflight
55:
28:
2220:Spacecraft propulsion
1670:European Space Agency
923:ITU Radio Regulations
869:
865:ITU Radio Regulations
836:
752:
658:
537:European Space Agency
433:used or designed for
54:
22:
1845:Satellite navigation
1407:on 16 September 2016
1307:"James A. Van Allen"
995:frequency allocation
963:Frequency allocation
859:) is – according to
704:sand and dust storms
2230:Electric propulsion
1917:Life-support system
1801:Imagery and mapping
1761:Private spaceflight
1556:EO Portal directory
1285:2015AdSpR..55.2833K
1240:10.1511/2008.74.390
1198:Satellite altimetry
867:(RR) – defined as:
765:northwest coast of
595:geostationary orbit
567:are also placed in
223:Apollo Lunar Module
2426:Satellites by type
2183:Robotic spacecraft
2109:Space and survival
1964:Space colonization
1860:Space architecture
1712:Outer Space Treaty
1561:2013-09-23 at the
1432:2008-07-04 at the
1228:American Scientist
1144:Imaging satellites
845:
758:
668:
666:weather satellite.
467:aerial photographs
180:Robotic spacecraft
56:
29:
2431:Satellite imagery
2408:
2407:
2355:Flight controller
2132:
2131:
1890:Human spaceflight
1865:Space exploration
1791:Earth observation
1335:. 18 August 2021.
1311:nmspacemuseum.org
1279:(12): 2833–2839.
1159:Satellite imagery
1118:Earth observation
1093:
1092:
847:According to the
645:Weather satellite
573:satellite imagery
435:Earth observation
419:
418:
313:Spaceflight types
257:
256:
214:Crewed spacecraft
206:
205:
121:Earth observation
2438:
2398:
2387:
2386:
2097:Space psychology
1922:Animals in space
1895:
1894:
1875:Space technology
1717:Rescue Agreement
1597:
1590:
1583:
1574:
1573:
1543:
1538:
1532:
1526:
1520:
1513:
1507:
1501:
1500:
1483:
1477:
1471:
1470:
1453:
1447:
1441:
1440:
1423:
1417:
1416:
1414:
1412:
1393:
1387:
1386:
1384:
1383:
1368:
1362:
1361:
1359:
1358:
1343:
1337:
1336:
1329:
1323:
1322:
1320:
1318:
1303:
1297:
1296:
1268:
1262:
1261:
1251:
1219:
1002:
1001:
950:
879:and one or more
727:Mount St. Helens
569:Low Earth orbits
463:satellite images
411:
404:
397:
383:
382:
381:
208:
207:
197:Cargo spacecraft
174:
173:
31:
30:
2446:
2445:
2441:
2440:
2439:
2437:
2436:
2435:
2411:
2410:
2409:
2404:
2374:
2341:
2313:Escape velocity
2294:
2246:
2213:Space telescope
2166:Reentry capsule
2128:
2068:
1973:
1944:Overview effect
1927:Bioastronautics
1884:
1772:
1606:
1601:
1563:Wayback Machine
1552:
1547:
1546:
1539:
1535:
1527:
1523:
1514:
1510:
1498:
1494:Wayback Machine
1484:
1480:
1468:
1454:
1450:
1438:
1434:Wayback Machine
1424:
1420:
1410:
1408:
1395:
1394:
1390:
1381:
1379:
1370:
1369:
1365:
1356:
1354:
1345:
1344:
1340:
1331:
1330:
1326:
1316:
1314:
1305:
1304:
1300:
1269:
1265:
1220:
1211:
1206:
1154:Space telescope
1104:
1100:Main category:
1098:
1078:
1076:
1064:
1044:
1042:
1040:
1038:
1026:
965:
946:
930:(article 1.20)
926:
915:
831:
815:
786:Sun-synchronous
780:
776:
747:
653:
647:
641:
636:
616:Herman PotoÄŤnik
613:
607:
539:as well as the
465:, analogous to
415:
379:
377:
372:
371:
352:
344:
343:
314:
306:
305:
296:Escape velocity
291:launch vehicles
269:
259:
258:
253:
252:
216:
202:
201:
182:
171:
161:
160:
111:
101:
100:
66:
17:
12:
11:
5:
2444:
2434:
2433:
2428:
2423:
2406:
2405:
2403:
2402:
2391:
2379:
2376:
2375:
2373:
2372:
2367:
2362:
2360:Ground station
2357:
2351:
2349:
2347:Ground segment
2343:
2342:
2340:
2339:
2334:
2329:
2324:
2315:
2310:
2304:
2302:
2296:
2295:
2293:
2292:
2287:
2282:
2280:Interplanetary
2277:
2276:
2275:
2273:Geosynchronous
2270:
2260:
2254:
2252:
2248:
2247:
2245:
2244:
2243:
2242:
2240:Gravity assist
2237:
2232:
2227:
2217:
2216:
2215:
2210:
2205:
2200:
2195:
2190:
2180:
2175:
2174:
2173:
2171:Service module
2168:
2163:
2161:Orbital module
2153:
2148:
2146:Launch vehicle
2142:
2140:
2134:
2133:
2130:
2129:
2127:
2126:
2124:Space sexology
2121:
2116:
2114:Space medicine
2111:
2106:
2105:
2104:
2094:
2089:
2088:
2087:
2076:
2074:
2070:
2069:
2067:
2066:
2061:
2056:
2051:
2046:
2041:
2040:
2039:
2029:
2024:
2023:
2022:
2017:
2007:
2002:
1997:
1992:
1987:
1981:
1979:
1975:
1974:
1972:
1971:
1966:
1961:
1956:
1951:
1949:Weightlessness
1946:
1941:
1936:
1935:
1934:
1929:
1924:
1914:
1913:
1912:
1901:
1899:
1892:
1886:
1885:
1883:
1882:
1877:
1872:
1870:Space research
1867:
1862:
1857:
1852:
1847:
1842:
1841:
1840:
1835:
1830:
1825:
1815:
1814:
1813:
1808:
1806:Reconnaissance
1803:
1798:
1788:
1782:
1780:
1774:
1773:
1771:
1770:
1769:
1768:
1758:
1757:
1756:
1751:
1746:
1736:
1735:
1734:
1729:
1724:
1719:
1714:
1704:
1703:
1702:
1697:
1692:
1687:
1682:
1677:
1675:European Union
1672:
1667:
1662:
1652:
1647:
1646:
1645:
1640:
1635:
1630:
1620:
1614:
1612:
1608:
1607:
1600:
1599:
1592:
1585:
1577:
1571:
1570:
1565:
1551:
1550:External links
1548:
1545:
1544:
1533:
1521:
1515:Grunsky, E.C.
1508:
1478:
1462:2012-09-10 at
1448:
1418:
1388:
1363:
1338:
1324:
1298:
1263:
1234:(5): 390–398.
1208:
1207:
1205:
1202:
1201:
1200:
1195:
1194:
1193:
1192:
1191:
1181:
1171:
1166:
1161:
1156:
1151:
1146:
1141:
1136:
1131:
1125:
1120:
1115:
1110:
1097:
1094:
1091:
1090:
1089:
1088:
1087:
1086:
1085:
1084:
1083:
1082:
1081:
1080:
1077:SPACE RESEARCH
1057:
1056:
1055:
1054:
1053:
1052:
1051:
1050:
1049:
1048:
1047:
1046:
1022:
1021:
1018:
1015:
1009:
1008:
1000:
999:
997:
987:
986:
983:
980:
964:
961:
960:
959:
958:
957:
956:(article 1.52)
944:
943:(article 1.22)
938:
937:(article 1.21)
914:
913:Classification
911:
906:
905:
902:
899:
896:
889:active sensors
881:space stations
877:earth stations
830:
827:
814:
811:
778:
774:
746:
743:
716:ocean currents
643:Main article:
640:
637:
635:
632:
606:
603:
543:spacecraft of
471:remote sensing
443:spy satellites
417:
416:
414:
413:
406:
399:
391:
388:
387:
374:
373:
370:
369:
364:
359:
357:Space agencies
353:
350:
349:
346:
345:
342:
341:
336:
331:
329:Interplanetary
326:
321:
315:
312:
311:
308:
307:
304:
303:
298:
293:
281:
276:
270:
265:
264:
261:
260:
255:
254:
251:
250:
245:
240:
238:Space stations
235:
230:
228:Space capsules
225:
220:
217:
212:
211:
204:
203:
200:
199:
194:
189:
183:
178:
177:
172:
167:
166:
163:
162:
159:
158:
153:
148:
143:
138:
133:
128:
123:
118:
116:Communications
112:
107:
106:
103:
102:
99:
98:
93:
91:Lunar missions
88:
83:
78:
73:
67:
62:
61:
58:
57:
47:
46:
40:
39:
15:
9:
6:
4:
3:
2:
2443:
2432:
2429:
2427:
2424:
2422:
2419:
2418:
2416:
2401:
2397:
2392:
2390:
2381:
2380:
2377:
2371:
2368:
2366:
2363:
2361:
2358:
2356:
2353:
2352:
2350:
2348:
2344:
2338:
2335:
2333:
2330:
2328:
2325:
2323:
2319:
2316:
2314:
2311:
2309:
2308:Direct ascent
2306:
2305:
2303:
2301:
2297:
2291:
2290:Intergalactic
2288:
2286:
2283:
2281:
2278:
2274:
2271:
2269:
2266:
2265:
2264:
2261:
2259:
2256:
2255:
2253:
2249:
2241:
2238:
2236:
2233:
2231:
2228:
2226:
2225:Rocket engine
2223:
2222:
2221:
2218:
2214:
2211:
2209:
2206:
2204:
2201:
2199:
2196:
2194:
2191:
2189:
2186:
2185:
2184:
2181:
2179:
2176:
2172:
2169:
2167:
2164:
2162:
2159:
2158:
2157:
2156:Space capsule
2154:
2152:
2149:
2147:
2144:
2143:
2141:
2139:
2135:
2125:
2122:
2120:
2119:Space nursing
2117:
2115:
2112:
2110:
2107:
2103:
2100:
2099:
2098:
2095:
2093:
2090:
2086:
2083:
2082:
2081:
2078:
2077:
2075:
2073:Health issues
2071:
2065:
2062:
2060:
2057:
2055:
2052:
2050:
2047:
2045:
2042:
2038:
2035:
2034:
2033:
2030:
2028:
2027:Space Shuttle
2025:
2021:
2018:
2016:
2013:
2012:
2011:
2008:
2006:
2003:
2001:
1998:
1996:
1993:
1991:
1988:
1986:
1983:
1982:
1980:
1976:
1970:
1967:
1965:
1962:
1960:
1959:Space tourism
1957:
1955:
1952:
1950:
1947:
1945:
1942:
1940:
1937:
1933:
1930:
1928:
1925:
1923:
1920:
1919:
1918:
1915:
1911:
1908:
1907:
1906:
1903:
1902:
1900:
1896:
1893:
1891:
1887:
1881:
1880:Space weather
1878:
1876:
1873:
1871:
1868:
1866:
1863:
1861:
1858:
1856:
1853:
1851:
1848:
1846:
1843:
1839:
1836:
1834:
1831:
1829:
1826:
1824:
1821:
1820:
1819:
1816:
1812:
1809:
1807:
1804:
1802:
1799:
1797:
1794:
1793:
1792:
1789:
1787:
1784:
1783:
1781:
1779:
1775:
1767:
1764:
1763:
1762:
1759:
1755:
1752:
1750:
1747:
1745:
1744:Space command
1742:
1741:
1740:
1739:Space warfare
1737:
1733:
1730:
1728:
1725:
1723:
1720:
1718:
1715:
1713:
1710:
1709:
1708:
1705:
1701:
1700:United States
1698:
1696:
1693:
1691:
1688:
1686:
1683:
1681:
1678:
1676:
1673:
1671:
1668:
1666:
1663:
1661:
1658:
1657:
1656:
1653:
1651:
1648:
1644:
1641:
1639:
1636:
1634:
1631:
1629:
1626:
1625:
1624:
1621:
1619:
1618:Astrodynamics
1616:
1615:
1613:
1609:
1605:
1598:
1593:
1591:
1586:
1584:
1579:
1578:
1575:
1569:
1566:
1564:
1560:
1557:
1554:
1553:
1542:
1537:
1531:
1525:
1518:
1512:
1505:
1504:public domain
1495:
1491:
1488:
1482:
1475:
1474:public domain
1465:
1464:archive.today
1461:
1458:
1452:
1445:
1444:public domain
1435:
1431:
1428:
1422:
1406:
1402:
1401:www.sasmac.cn
1398:
1392:
1378:on 2016-03-04
1377:
1373:
1367:
1353:on 2019-01-17
1352:
1348:
1342:
1334:
1328:
1312:
1308:
1302:
1294:
1290:
1286:
1282:
1278:
1274:
1267:
1259:
1255:
1250:
1245:
1241:
1237:
1233:
1229:
1225:
1218:
1216:
1214:
1209:
1199:
1196:
1190:
1187:
1186:
1185:
1182:
1180:
1179:Radar imaging
1177:
1176:
1175:
1172:
1170:
1167:
1165:
1162:
1160:
1157:
1155:
1152:
1150:
1147:
1145:
1142:
1140:
1137:
1135:
1132:
1129:
1126:
1124:
1121:
1119:
1116:
1114:
1111:
1109:
1106:
1105:
1103:
1075:RADIOLOCATION
1074:
1073:
1072:
1071:
1070:
1069:
1068:
1067:
1066:
1065:
1063:
1058:
1036:
1035:
1034:
1033:
1032:
1031:
1030:
1029:
1028:
1027:
1023:
1019:
1016:
1014:
1011:
1007:
998:
996:
992:
991:
990:
984:
981:
978:
977:
976:
972:
970:
955:
952:
951:
949:
945:
942:
939:
936:
933:
932:
931:
929:
928:Fixed service
924:
920:
909:
903:
900:
897:
894:
890:
886:
885:
884:
882:
878:
874:
868:
866:
862:
858:
854:
850:
842:
839:
835:
826:
824:
820:
810:
808:
804:
800:
796:
791:
787:
782:
772:
768:
763:
756:
751:
742:
740:
736:
732:
728:
723:
721:
717:
713:
709:
705:
701:
697:
694:, effects of
693:
689:
685:
681:
677:
673:
665:
664:United States
661:
657:
652:
646:
631:
629:
625:
624:geostationary
621:
617:
612:
602:
600:
596:
591:
589:
585:
581:
576:
574:
570:
566:
562:
558:
554:
550:
546:
542:
538:
534:
530:
526:
522:
518:
513:
511:
505:
503:
499:
495:
491:
487:
483:
478:
476:
472:
468:
464:
460:
456:
452:
448:
444:
440:
436:
432:
428:
424:
412:
407:
405:
400:
398:
393:
392:
390:
389:
386:
376:
375:
368:
365:
363:
360:
358:
355:
354:
348:
347:
340:
339:Intergalactic
337:
335:
332:
330:
327:
325:
322:
320:
317:
316:
310:
309:
302:
299:
297:
294:
292:
289:
285:
282:
280:
277:
275:
272:
271:
268:
263:
262:
249:
246:
244:
241:
239:
236:
234:
233:Space Shuttle
231:
229:
226:
224:
221:
219:
218:
215:
210:
209:
198:
195:
193:
190:
188:
185:
184:
181:
176:
175:
170:
165:
164:
157:
154:
152:
149:
147:
144:
142:
139:
137:
134:
132:
129:
127:
124:
122:
119:
117:
114:
113:
110:
105:
104:
97:
96:Mars missions
94:
92:
89:
87:
84:
82:
79:
77:
74:
72:
69:
68:
65:
60:
59:
53:
49:
48:
45:
42:
41:
37:
33:
32:
26:
21:
2300:Space launch
2285:Interstellar
2251:Destinations
2020:Apollo–Soyuz
1969:Space diving
1954:Space toilet
1790:
1778:Applications
1695:Soviet Union
1655:Space policy
1650:Space launch
1540:
1536:
1529:
1524:
1511:
1481:
1451:
1421:
1409:. Retrieved
1405:the original
1400:
1391:
1380:. Retrieved
1376:the original
1366:
1355:. Retrieved
1351:the original
1341:
1327:
1315:. Retrieved
1310:
1301:
1276:
1272:
1266:
1231:
1227:
1061:
1005:
988:
973:
968:
966:
947:
922:
918:
916:
907:
870:
861:Article 1.51
860:
856:
852:
846:
840:
816:
783:
759:
724:
669:
634:Applications
619:
614:
592:
584:ground track
577:
529:ERS-1, ERS-2
514:
506:
479:
461:, that take
458:
441:, including
426:
422:
420:
362:Space forces
334:Interstellar
267:Space launch
120:
109:Applications
86:Space probes
2258:Sub-orbital
2193:Space probe
2059:New Shepard
2037:Shuttle–Mir
1796:Archaeology
1749:Space force
1732:Moon Treaty
1604:Spaceflight
1427:Satellites.
993:Example of
580:polar orbit
510:Planet Labs
455:cartography
451:meteorology
319:Sub-orbital
243:Spaceplanes
192:Space probe
126:Exploration
44:Spaceflight
2415:Categories
2327:Launch pad
2318:Expendable
2268:Geocentric
2235:Solar sail
2178:Spaceplane
2138:Spacecraft
1932:Space suit
1910:commercial
1838:Television
1633:Space Race
1382:2016-07-04
1357:2016-07-04
1204:References
893:satellites
823:TerraSAR-X
819:Radarsat-1
731:Mount Etna
649:See also:
609:See also:
565:DubaiSat-2
561:DubaiSat-1
490:Explorer 1
486:ionosphere
437:(EO) from
284:Expendable
279:Launch pad
169:Spacecraft
151:Telescopes
146:Settlement
141:Navigation
76:Space Race
2337:Spaceport
2188:Satellite
1905:Astronaut
1833:Telephone
1786:Astronomy
1707:Space law
1660:Australia
1020:Region 3
969:Article 5
696:pollution
672:satellite
482:Sputnik 1
431:satellite
367:Companies
274:Spaceport
187:Satellite
131:Espionage
2389:Category
2054:Tiangong
2049:Shenzhou
1978:Programs
1823:Internet
1628:Timeline
1559:Archived
1490:Archived
1487:Drought.
1460:Archived
1430:Archived
1425:NESDIS,
1411:19 April
1258:19498953
1096:See also
1017:Region 2
1013:Region 1
875:between
838:RapidEye
807:air drag
795:"frozen"
790:"frozen"
735:Colorado
545:EUMETSAT
521:air-drag
288:reusable
136:Military
36:a series
34:Part of
2263:Orbital
2064:Artemis
1995:Voskhod
1990:Mercury
1898:General
1638:Records
1623:History
1611:General
1281:Bibcode
1249:2690060
1139:Phi Lab
863:of the
855:(also:
851:(ITU),
813:Mapping
771:ENVISAT
710:cover,
700:auroras
682:of the
680:climate
676:weather
639:Weather
605:History
553:Proba-2
549:Proba-1
533:Envisat
525:reboost
498:TIROS-1
324:Orbital
156:Tourism
64:History
25:A-train
2400:Portal
2393:
2382:
2198:Lander
2151:Rocket
2015:Skylab
2010:Apollo
2000:Gemini
1985:Vostok
1690:Russia
1485:NASA,
1455:NOAA,
1317:14 May
1256:
1246:
1043:Fixed
805:, and
777:and SO
720:energy
688:clouds
660:GOES-8
563:&
496:. The
248:Vostok
2203:Rover
2005:Soyuz
1828:Radio
1685:Japan
1680:India
1665:China
917:This
767:Spain
692:fires
684:Earth
541:MetOp
517:Earth
515:Most
439:orbit
429:is a
2365:Pass
2320:and
1413:2017
1319:2018
1254:PMID
821:and
788:and
739:Utah
737:and
708:snow
678:and
662:, a
557:SMOS
555:and
531:and
286:and
2032:Mir
1289:doi
1244:PMC
1236:doi
891:on
712:ice
535:of
425:or
421:An
2417::
1399:.
1309:.
1287:.
1277:55
1275:.
1252:.
1242:.
1232:96
1230:.
1226:.
1212:^
871:A
825:.
809:.
781:.
718:,
706:,
702:,
698:,
601:.
593:A
590:.
551:,
512:.
477:.
453:,
449:,
38:on
1596:e
1589:t
1582:v
1506:.
1476:.
1446:.
1415:.
1385:.
1360:.
1321:.
1295:.
1291::
1283::
1260:.
1238::
895:;
779:2
775:2
410:e
403:t
396:v
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
