Info about R1/E12 & E3:
Rainbow 1 is a high power Ku-band direct broadcasting satellite, which was ordered by Cablevision from Lockheed Martin, using the A2100AXS bus. Cablevision remains very secretive about the details of this satellite. It will provide direct broadcast services across the continental United States (CONUS) from its final orbital location at 61.5° west longitude. The spacecraft features 24 MHz Ku-band high power transponders with a combination of 135 watt and 65 watt power amplifiers. The flexible design of the payload provides full interconnectivity to provide either all CONUS or all spot beam coverage through 22 individually programmable spot beams or a selectable mixture of both spot and CONUS coverage. The design life of the spacecraft is 18 years.
In January 2005 Cablevision agreed to sell the Rainbow 1 satellite to Echostar. In March 2006, the satellite was renamed Echostar 12.
EchoStar III. EchoStar III was launched during October 1997 and currently operates at the 61.5 degree orbital location. The satellite was originally designed to operate a maximum of 32 transponders at approximately 120 watts per channel, switchable to 16 transponders operating at over 230 watts per channel, and was equipped with a total of 44 transponders to provide redundancy. Prior to 2006, TWTA anomalies caused 22 transponders to fail. During April and October 2006, further TWTA anomalies caused the failure of four additional transponders. As a result, a maximum of 18 transponders are currently available for use on EchoStar III, but due to redundancy switching limitations and specific channel authorizations, we can only operate 15 of the 19 FCC authorized frequencies we have the right to utilize at the 61.5 degree location. While we do not expect a large number of additional TWTAs to fail in any year, and the failures have not reduced the original minimum 12-year design life of the satellite, it is likely that additional TWTA failures will occur from time to time in the future, and those failures will further impact commercial operation of the satellite.
EchoStar XII. EchoStar XII was launched during July 2003 and currently operates at the 61.5 degree orbital location. The satellite was designed to operate 13 transponders at 270 watts per channel, in CONUS mode, or 22 spot beams using a combination of 135 and 65 watt TWTAs. We currently operate the satellite in CONUS mode. EchoStar XII has a total of 24 solar array circuits, approximately 22 of which are required to assure full power for the original minimum 12-year design life of the satellite. Prior to 2006, two solar array circuits failed, one of which was subsequently restored to partial use. During 2006, three additional solar array circuits failed. The cause of the failures is being investigated. While the design life of the satellite has not been affected, in future years the power loss will cause a reduction in the number of transponders which can be operated. The exact extent of this impact has not yet been determined. There can be no assurance future anomalies will not cause further losses, which could further impact commercial operation of the satellite or its useful life. See discussion of evaluation of impairment in "Long-Lived Satellite Assets" in Note 4 in the Notes to the Consolidated Financial Statements in Item 15 of this Annual Report on Form 10-K.