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Communications satellite
EchoStar IV Mission type Communications Operator EchoStar COSPAR ID 1998-028A SATCAT no. 25331 Mission duration 12 years
Bus A2100AX Manufacturer Lockheed Martin Launch mass 3,478 kg (7,668 lb) Dry mass 1,400 kg (3,100 lb) Power 10 kW
Launch date May 7, 1998, 23:45 (1998-05-07UTC23:45Z ) UTC Rocket Proton-K /Blok-DM3Launch site Baikonur 81/23
Deactivated July 2011 (July 2011 )
Reference system Geocentric Regime Geostationary Longitude 77° west[ 1] Semi-major axis 42,538.0 kilometers (26,431.9 mi)[ 1] Perigee altitude 36,085.2 kilometers (22,422.3 mi)[ 1] Apogee altitude 36,250.7 kilometers (22,525.1 mi)[ 1] Inclination 7.0 degrees[ 1] Period 1,455.3 minutes[ 1] Epoch May 14, 2017[ 1]
Band 32 Ku band Frequency Uplink : 17.3 - 17.8 GHz Downlink : 12.2 - 12.7 GHzBandwidth 24 MHz Coverage area United States, Mexico and Puerto Rico EIRP 53 dBW
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.
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.[ 2]
Payloads are separated by bullets ( · ), launches by pipes ( | ). Crewed flights are indicated in underline . Uncatalogued launch failures are listed in italics . Payloads deployed from other spacecraft are denoted in (brackets).
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