| 词条 | Kosmos 954 |
| 释义 |
| name = Kosmos 954 | names_list = | image = | image_caption = Sketch of Kosmos 954 | image_alt = | image_size = | mission_type = Reconnaissance | operator = | Harvard_designation = | COSPAR_ID = 1977-090A | SATCAT = 10361 | website = | mission_duration = | distance_travelled = | orbits_completed = | suborbital_range = | suborbital_apogee = | spacecraft = | spacecraft_type = | spacecraft_bus = | manufacturer = | launch_mass = {{convert|3800|kg|abbr=on}} | BOL_mass = | landing_mass = | dry_mass = | payload_mass = | dimensions = | power = | launch_date = {{start date|1977|09|18|13|55|00|7=Z}} | launch_rocket = Tsyklon-2 | launch_site = Tyuratam | launch_contractor = | deployment_from = | deployment_date = | entered_service = | disposal_type = | deactivated = | destroyed = | last_contact = | recovery_by = | recovery_date = | decay_date = {{end date|1978|01|24}} | landing_date = | landing_site = | orbit_reference = Geocentric | orbit_regime = | orbit_longitude = | orbit_slot = | orbit_semimajor = | orbit_eccentricity = 0.00135 | orbit_periapsis = {{convert|259|km|abbr=on}} | orbit_apoapsis = {{convert|277|km|abbr=on}} | orbit_inclination = 65° | orbit_period = 89.6 min | orbit_RAAN = | orbit_arg_periapsis = | orbit_mean_anomaly = | orbit_mean_motion = | orbit_repeat = | orbit_velocity = | orbit_epoch = September 18, 1977 | orbit_rev_number = | apsis = gee | trans_band = | trans_frequency = | trans_bandwidth = | trans_capacity = | trans_coverage = | trans_TWTA = | trans_EIRP = | trans_HPBW = | programme = | previous_mission = | next_mission = | insignia = | insignia_caption = | insignia_alt = | insignia_size = }}Kosmos 954 ({{lang-ru|Космос 954}}) was a reconnaissance satellite launched by the Soviet Union in 1977. A malfunction prevented safe separation of its onboard nuclear reactor; when the satellite reentered the Earth's atmosphere the following year, it scattered radioactive debris over northern Canada, prompting an extensive cleanup operation known as Operation Morning Light.[1][2][1] Launch and operationThe satellite was part of the Soviet Union's RORSAT programme, a series of reconnaissance satellites which observed ocean traffic, including surface vessels and nuclear submarines, using active radar. It was assigned the Kosmos number 954 and was launched on September 18, 1977 at 13:55 UTC from the Baikonur Cosmodrome, on a Tsyklon-2 carrier rocket.{{sfn|Heaps|1978|p=13}}[5] With an orbital inclination of 65°, a periapsis of {{convert|259|km|miles}} and apoapsis of {{convert|277|km|miles}}, it orbited the Earth every 89.5 minutes.[5] Powered by a liquid sodium–potassium thermionic converter driven by a nuclear reactor containing around {{convert|50|kg}} of uranium-235,{{sfn|Heaps|1978|p=13}}{{sfn|Harland|Lorenz|2005|p=236}} the satellite was intended for long-term on-orbit observation, but by December 1977 the satellite had deviated from its designed orbit and its flightpath was becoming increasingly erratic.{{sfn|Heaps|1978|p=14}} In mid-December North American Aerospace Defense Command, which had assigned the satellite the Satellite Catalog Number 10361, noticed Kosmos 954 making erratic manoeuvres, changing the altitude of its orbit by up to 50 miles, as its Soviet operators struggled to control their failing spacecraft.{{sfn|Heaps|1978|p=13}} In secret meetings, Soviet officials warned their US counterparts that they had lost control over the vehicle, and that the system which was intended to propel the spent reactor core into a safe disposal orbit had failed.[2] At 11:53 AM GMT on January 24, 1978, Kosmos 954 reentered the Earth's atmosphere while travelling on a northeastward track over western Canada.{{sfn|Heaps|1978|pp=80–81}}{{sfn|Benkö|1985|pp=49–51}}[1] At first the USSR claimed that the satellite had been completely destroyed during re-entry,[2] but later searches showed debris from the satellite had been deposited on Canadian territory along a {{convert|600|km|mi|adj=on}} path from Great Slave Lake[10] to Baker Lake. The area spans portions of the Northwest Territories, present-day Nunavut, Alberta and Saskatchewan.[1]{{sfn|Benkö|1985|pp=49–51}} RecoveryThe effort to recover radioactive material from the satellite was dubbed Operation Morning Light. Covering a total area of {{Convert|124000|km2|sqmi}}, the joint Canadian–American team swept the area by foot and air in Phase I from January 24, 1978 to April 20, 1978 and Phase II from April 21, 1978 to October 15, 1978.[1][2] They were ultimately able to recover 12 large pieces of the satellite. 10 of the fragments recovered were radioactive.[1] These pieces displayed radioactivity of up to 1.1 sieverts per hour, yet they only comprised an estimated 1% of the fuel. One fragment had a radiation level of 500 R/h, which "is sufficient to kill a person ... remaining in contact with the piece for a few hours."{{Sfn|Benkö|1985|pp=50, 78}} AftermathUnder the terms of the 1972 Space Liability Convention, a state which launches an object into space is liable for damages caused by that object.[1] For the recovery efforts, the Canadian government billed the Soviet Union C$6,041,174.70 for actual expenses and additional compensation for future unpredicted expenses; the USSR eventually paid the sum of C$3 million.{{sfn|Benkö|1985|pp=49–51}} Kosmos 954 was not the first nuclear-powered RORSAT to fail; a launch of a similar satellite in 1973 failed, dropping its reactor into the Pacific Ocean north of Japan. Kosmos 1402 also failed, dropping its reactor into the South Atlantic in 1983. Subsequent RORSATs were equipped with a backup core ejection mechanism – when the primary failed on Kosmos 1900 in 1988 this system succeeded in raising the core to a safe disposal orbit.{{sfn|Harland|Lorenz|2005|p=236}} Search teams did not find re-entry debris at the predicted location until they recalculated where that location would be based upon data indicating a stratospheric warming event had been{{when|date=May 2018}} in progress during re-entry. The stratospheric warming was first documented by the US Army Meteorological Rocket Network station at Poker Flat Research Range near Fairbanks, Alaska.{{citation needed|date=May 2018}} Pop cultureKosmos 954 has become a well known piece of history and lore in Yellowknife, the capital of the Northwest Territories. Yellowknife painter Nick MacIntosh has created works of art featuring the satellite and well known local landmarks.[2] The January 28, 1978, episode of Saturday Night Live featured a running gag about the radioactive debris from the crashed satellite having created giant, mutant lobsters heading for the US east coast, concluding with them invading the studio at the show's end.[3] References{{Portal|Spaceflight}}{{Commons category|Cosmos 954}}1. ^{{cite news |url=http://nationalinterest.org/feature/operation-morning-light-the-nuclear-satellite-almost-14411?page=1 |title=The Cold War near-atrocity that was nobody's fault |first1=Steve |last1=Weintz |newspaper=The National Interest |date=November 23, 2015 |accessdate=November 23, 2015}} [4][5][6][7]2. ^{{cite web|last1 = Rendell|first1 = Mark|title = The Fall, And Artistic Rise, Of Kosmos 954|url = http://edgeyk.com/article/the-fall-and-artistic-rise-of-kosmos-954-4/|website = EDGE YK|accessdate = 19 December 2014}} 3. ^{{cite web|url=http://snltranscripts.jt.org/77/77jlobsters.phtml|title=SNL Transcripts: Robert Klein: 01/21/78: Lobsters Take New York / Goodnights|publisher=}} 4. ^1 2 3 4 {{cite book|title=Outer Space: Problems of Law and Policy|last1=Reynolds|first1=Glenn H.|last2=Merges|first2=Robert P.|publisher=Westview Press|year=1998|pages=179–189|isbn=978-0-8133-6680-7}} 5. ^1 2 3 4 5 6 {{cite web|url=http://www.jaxa.jp/library/space_law/chapter_3/3-2-2-1_e.html|title=Settlement of Claim between Canada and the Union of Soviet Socialist Republics for Damage Caused by Cosmos 954|date=April 2, 1981}} 6. ^1 {{cite book|title=Space debris: legal and policy implications|publisher=Nijhoff|year=1989|isbn=978-0-7923-0166-0|first=Howard A.|last=Baker|page=66}} 7. ^1 2 {{cite web|url=http://nssdc.gsfc.nasa.gov/nmc/spacecraftOrbit.do?id=1977-090A|publisher=National Space Science Data Center, NASA|title=Cosmos 954 (1977-090A)}} }} Bibliography
| last = Heaps | first = Leo | year = 1978 | title = Operation Morning Light : Terror in our Skies : The True Story of Cosmos 954 | publisher = Paddington Press Ltd | location = New York | isbn = 0-7092-0323-3 | ref = harv
| last1=Harland | first1=David M | last2=Lorenz | first2=Ralph D. | year=2005 | publisher=Praxis Publishing (Springer) | location=Berlin, Heidelberg, New York | isbn=0-387-21519-0 | title=Space Systems Failures – Disasters and rescues of satellites, rockets, and space probes | ref=harv
| last1=Benkö | first1=Marietta | title=Space law in the United Nations | publisher=Martinus Nijhoff | year=1985 | isbn=978-90-247-3157-2 | ref=harv External links
15 : Artificial satellites formerly orbiting Earth|Kosmos satellites|Reconnaissance satellites of the Soviet Union|Canada–Soviet Union relations|1978 in the Soviet Union|Nuclear power in space|1978 in Canada|Nuclear accidents and incidents|Disasters in the Northwest Territories|Disasters in Alberta|Disasters in Saskatchewan|Environment of Canada|Spacecraft launched in 1977|History of Yellowknife|Nuclear-powered robots |
| 随便看 |
|
开放百科全书收录14589846条英语、德语、日语等多语种百科知识，基本涵盖了大多数领域的百科知识，是一部内容自由、开放的电子版国际百科全书。