LOFTI-1 (original) (raw)
LOFTI-1 was an American satellite which was launched in 1961 and operated by the United States Navy and Naval Research Laboratory. It was used to conduct research into the propagation of very low frequency radio signals in the ionosphere, and to investigate if these signals could be received by submarines. A 136.17 MHz transmitter was used for this investigation.
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| dbo:abstract | LOFTI-1 was an American satellite which was launched in 1961 and operated by the United States Navy and Naval Research Laboratory. It was used to conduct research into the propagation of very low frequency radio signals in the ionosphere, and to investigate if these signals could be received by submarines. A 136.17 MHz transmitter was used for this investigation. The launch of LOFTI-1 was conducted at 03:45 UTC on 22 February 1961, using a Thor DM-21 Ablestar rocket flying from Launch Complex 17B at the Cape Canaveral Air Force Station. It was a secondary payload aboard the rocket, with the primary payload being the Transit 3B prototype navigation satellite. The rocket and upper stage used had the serial numbers Thor 313 and Ablestar 007 respectively. The launch resulted in a partial failure, with the spacecraft being placed in a more eccentric orbit than planned, and failing to separate from the upper stage. LOFTI-1 was a 26-kilogram (57 lb) spacecraft, which was powered by six groups of solar cells charging a nickel-cadmium battery. It ended up in a low Earth orbit with a perigee of 167 kilometres (104 mi), an apogee of 1,002 kilometres (623 mi), and 28.3 degrees of inclination. It had an orbital period of 96.4 minutes. Due to the low perigee of its orbit, LOFTI-1 decayed quickly, and reentered the atmosphere on 30 March 1961, less than 37 days after launch. Despite being in the wrong orbit and operating for less time than had been planned, some useful data was returned from the mission. Together with data returned by later satellites, the data returned by LOFTI-1 proved that very low frequency signals were not suitable for satellite communications with submarines. (en) LOFTI 1 (ang. Low Frequency Trans Ionospheric Satellite) – amerykański wojskowy , który miał prowadzić badania związane z propagacją fal radiowych o bardzo niskiej częstotliwości w jonosferze. Misja zakończyła się częściowym sukcesem, ponieważ LOFTI 1 nie oddzielił się od satelity Transit 3B, do którego był przymocowany. Oba statki nie odłączyły się też od ostatniego członu rakiety. Otrzymały przez to orbitę eliptyczną, co skróciło ich żywotność do 37 dni. Statki funkcjonowały prawidłowo, jednak będąc połączone nie mogły zostać użyte do zaplanowanych celów. Misję finansowało (NRL) z ramienia US Navy. (pl) |
| dbo:landingDate | 1961-03-30 (xsd:date) |
| dbo:launchDate | 1961-02-22 (xsd:date) |
| dbo:launchVehicle | dbr:Thor-Ablestar |
| dbo:manufacturer | dbr:United_States_Naval_Research_Laboratory |
| dbo:operator | dbr:US_Navy dbr:United_States_Naval_Research_Laboratory |
| dbo:thumbnail | wiki-commons:Special:FilePath/LOFTI_1.jpg?width=300 |
| dbo:wikiPageID | 28032117 (xsd:integer) |
| dbo:wikiPageLength | 4939 (xsd:nonNegativeInteger) |
| dbo:wikiPageRevisionID | 1064883317 (xsd:integer) |
| dbo:wikiPageWikiLink | dbr:Cape_Canaveral_Air_Force_Station dbr:Cape_Canaveral_Air_Force_Station_Space_Launch_Complex_17 dbr:Apsis dbr:US_Navy dbr:United_States_Naval_Research_Laboratory dbr:United_States_Navy dbr:Very_low_frequency dbr:Geocentric_orbit dbr:Thor-Ablestar dbr:Orbital_period dbc:Spacecraft_launched_in_1961 dbc:Spacecraft_which_reentered_in_1961 dbr:Transit_3B dbr:Orbital_decay dbr:Ionosphere dbc:Partial_satellite_launch_failures dbr:Orbital_eccentricity dbr:Inclination dbr:Low_Earth_orbit dbr:Atmospheric_reentry dbr:Nickel-cadmium_battery |
| dbp:apsis | gee (en) |
| dbp:decayDate | 1961-03-30 (xsd:date) |
| dbp:harvardDesignation | 1961 (xsd:integer) |
| dbp:imageCaption | LOFTI-1 before launch (en) |
| dbp:launchDate | 0001-02-22 (xsd:gMonthDay) |
| dbp:launchRocket | Thor DM-21 Ablestar 313 (en) |
| dbp:launchSite | dbr:Cape_Canaveral_Air_Force_Station dbr:Cape_Canaveral_Air_Force_Station_Space_Launch_Complex_17 |
| dbp:manufacturer | NRL (en) |
| dbp:missionType | Ionospheric (en) |
| dbp:name | LOFTI-1 (en) |
| dbp:operator | dbr:US_Navy dbr:United_States_Naval_Research_Laboratory |
| dbp:orbitEpoch | 0001-02-21 (xsd:gMonthDay) |
| dbp:orbitInclination | 28.300000 (xsd:double) |
| dbp:orbitPeriod | 5784.0 |
| dbp:orbitReference | dbr:Geocentric_orbit |
| dbp:orbitRegime | dbr:Low_Earth_orbit |
| dbp:wikiPageUsesTemplate | dbt:Convert dbt:Infobox_spaceflight dbt:Portal dbt:Reflist dbt:End-date dbt:Start-date dbt:Orbital_launches_in_1961 dbt:US-spacecraft-stub |
| dcterms:subject | dbc:Spacecraft_launched_in_1961 dbc:Spacecraft_which_reentered_in_1961 dbc:Partial_satellite_launch_failures |
| gold:hypernym | dbr:Satellite |
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| rdfs:comment | LOFTI-1 was an American satellite which was launched in 1961 and operated by the United States Navy and Naval Research Laboratory. It was used to conduct research into the propagation of very low frequency radio signals in the ionosphere, and to investigate if these signals could be received by submarines. A 136.17 MHz transmitter was used for this investigation. (en) LOFTI 1 (ang. Low Frequency Trans Ionospheric Satellite) – amerykański wojskowy , który miał prowadzić badania związane z propagacją fal radiowych o bardzo niskiej częstotliwości w jonosferze. Misja zakończyła się częściowym sukcesem, ponieważ LOFTI 1 nie oddzielił się od satelity Transit 3B, do którego był przymocowany. Oba statki nie odłączyły się też od ostatniego członu rakiety. Otrzymały przez to orbitę eliptyczną, co skróciło ich żywotność do 37 dni. Statki funkcjonowały prawidłowo, jednak będąc połączone nie mogły zostać użyte do zaplanowanych celów. (pl) |
| rdfs:label | LOFTI-1 (en) LOFTI 1 (pl) |
| owl:sameAs | freebase:LOFTI-1 yago-res:LOFTI-1 wikidata:LOFTI-1 dbpedia-pl:LOFTI-1 https://global.dbpedia.org/id/4q8Dk |
| prov:wasDerivedFrom | wikipedia-en:LOFTI-1?oldid=1064883317&ns=0 |
| foaf:depiction | wiki-commons:Special:FilePath/LOFTI_1.jpg |
| foaf:isPrimaryTopicOf | wikipedia-en:LOFTI-1 |
| foaf:name | LOFTI-1 (en) |
| is dbo:wikiPageWikiLink of | dbr:SOLRAD_4 dbr:LOFTI_2 dbr:1961_in_spaceflight_(January–June) dbr:Transit_3B |
| is foaf:primaryTopic of | wikipedia-en:LOFTI-1 |
