| 词条 | Nimiq-4 |
| 释义 |
| name = Nimiq-4 | image = | image_caption = | mission_type = | operator = Telesat Canada | website = | COSPAR_ID = | SATCAT = | mission_duration = | spacecraft_bus = Eurostar-3000S | manufacturer = EADS Astrium | dry_mass = | launch_mass = | power = | launch_date = {{start-date|18 September 2008, 21:47|timezone=yes}} | launch_rocket = Proton-M/Briz-M | launch_site = Baikonur 200/39 | launch_contractor = ILS | entered_service = | disposal_type = | deactivated = | orbit_epoch = | orbit_reference = Geocentric | orbit_regime = Geostationary | orbit_periapsis = | orbit_apoapsis = | orbit_inclination = | orbit_period = | orbit_longitude = | orbit_slot = | apsis = gee | trans_band = | trans_frequency = | trans_bandwidth = | trans_capacity = | trans_coverage = | trans_TWTA = | trans_EIRP = | trans_HPBW = }} Nimiq-4 is a Canadian geosynchronous communications satellite. It was launched aboard a Proton-M/Briz-M carrier rocket at 21:47 GMT on 19 September 2008. It was positioned at 82ºW longitude, and operated by Telesat Canada. The satellite was constructed by EADS Astrium, using a Eurostar-3000S bus. It is powered by two solar arrays, with a span of {{convert|39|m|ft}}, producing 12 kW of power. The launch mass of the satellite is {{convert|4.8|t|LT}}. It carries 40 transponders, 32 of which operate in the NATO J band (IEEE Ku band), and 8 which operate in the NATO K band (IEEE Ka band). See also
References
3 : Communications satellites in geostationary orbit|Spacecraft launched in 2008|Satellites using the Eurostar bus |
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