EchoStar IV
{{Short description|Communications satellite}}
{{Infobox spaceflight
| name = EchoStar IV
| image =
| image_caption =
| mission_type = Communications
| operator = EchoStar
| website =
| COSPAR_ID = 1998-028A
| SATCAT = 25331
| mission_duration = 12 years
| spacecraft_bus = A2100AX
| spacecraft_type =
| manufacturer = Lockheed Martin
| dry_mass = {{convert|1,400|kg|lb|abbr=on}}
| launch_mass = {{convert|3,478|kg|lb|abbr=on}}
| BOL_mass =
| dimensions =
| power = 10 kW
| launch_date = {{start date text|May 7, 1998, 23:45|timezone=yes}} UTC
| launch_rocket = Proton-K/Blok-DM3
| launch_site = Baikonur 81/23
| launch_contractor =
| disposal_type =
| deactivated = {{end date|2011|07}}
| orbit_epoch = May 14, 2017{{cite web|url=https://www.n2yo.com/satellite/?s=25331/ |last=N2yo |title=ECHOSTAR 4 |accessdate=November 28, 2017}}
| orbit_reference = Geocentric
| orbit_regime = Geostationary
| orbit_periapsis = {{convert|36,085.2|km|mi|sp=us}}
| orbit_apoapsis = {{convert|36,250.7|km|mi|sp=us}}
| orbit_inclination = 7.0 degrees
| orbit_semimajor = {{convert|42,538.0|km|mi|sp=us}}
| orbit_period = 1,455.3 minutes
| apsis = gee
| trans_band = 32 {{Ku band}}
| trans_frequency = Uplink: 17.3 - 17.8 GHz
Downlink: 12.2 - 12.7 GHz
| trans_bandwidth = 24 MHz
| trans_capacity =
| trans_coverage = United States, Mexico and Puerto Rico
| trans_TWTA =
| trans_EIRP = 53 dBW
| trans_HPBW =
}}
EchoStar IV is a communications satellite operated by EchoStar. Launched in 1998 it was operated in geostationary orbit at a longitude of 77 degrees west for 12 years.
Satellite
The launch of EchoStar IV made use of a Proton rocket flying from Site 81 at the Baikonur Cosmodrome, Kazakhstan. The launch took place at 23:45 UTC on May 7, 1998, with the spacecraft entering a geosynchronous transfer orbit. EchoStar IV carried 32 Ku band transponders to provide direct voice and video communications to small dishes in North America after parking over 119° W or 148° W longitude.{{cite web|url=http://www.satbeams.com/satellites?id=25331|title=EchoStar 4|publisher=SatBeams|accessdate=September 28, 2017}}
Specifications
- Launch mass: {{convert|3,478|kg|lb}}
- Power: 2 deployable solar arrays, batteries
- Stabilization: 3-axis
- Propulsion: LEROS-1C
- Longitude: 77° west
{{Clear}}
See also
{{Portal|Spaceflight}}
References
{{reflist|2}}
{{Orbital launches in 1998}}
{{EchoStar satellites}}
{{Dish Network}}
Category:Spacecraft launched in 1998
Category:Communications satellites in geostationary orbit
Category:Satellites using the A2100 bus
Category:Spacecraft launched by Proton rockets
Category:Derelict satellites orbiting Earth
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