take a look at the entire E* fleet, almost every bird has had problems, many are dying early, many can't work at full capacity. You gotta hope there are no more problems with these guys.
OUR SATELLITES
Our DISH Network satellite television programming is currently transmitted to our customers over satellites that operate in the "Ku" band portion of the microwave radio spectrum. The Ku-band is divided into two spectrum segments. The high power portion of the Ku-band — 12.2 to 12.7 GHz — is known as the Broadcast Satellite Service ("BSS") band, which is also referred to as the Direct Broadcast Satellite ("DBS") band. The low and medium power portion of the Ku-band — 11.7 to 12.2 GHz — is known as the Fixed Satellite Service ("FSS") band.
Most of our DTH programming is currently delivered using DBS satellites. We continue to explore opportunities to expand our available DTH and wholesale commercial satellite capacity through the use of other available spectrum. Increasing our available spectrum for DTH applications is particularly important as more bandwidth intensive HD programming is produced and in order to address new video and data applications consumers may desire in the future. Although we have provided DTH services on a limited basis using FSS spectrum, due to the larger dish size generally required and other technical limitations, this spectrum is best suited for commercial and wholesale business applications.
We also continue to explore the use of Ka-band spectrum for DTH use. The Ka-band is a higher frequency band than the Ku-band, ranging from 18 to 40 GHz. However, a larger dish is generally required and interference caused by rain and snow is a more significant problem than is the case with DBS spectrum.
Satellite Fleet
We presently transmit programming from 14 satellites in geostationary orbit approximately 22,300 miles above the equator. Of these 11 are owned and three are leased. Our satellite fleet is a major component of our EchoStar DBS System. While we believe that overall our satellite fleet is generally in good condition, during 2006 and prior periods, certain satellites in our fleet have experienced anomalies, some of which have had a significant adverse impact on their commercial operation. We currently do not carry insurance for any of our owned in-orbit satellites. We believe we generally have in-orbit satellite capacity sufficient to recover, in a relatively short time frame, transmission of most of our critical programming in the event one of our in-orbit satellites were to fail. We could not, however, recover certain local markets, international and other niche programming in the event of such a failure, with the extent of disruption dependent on the specific satellite experiencing the failure. Further, programming continuity cannot be assured in the event of multiple satellite losses.
Owned Satellites
We currently own 11 in-orbit satellites.
EchoStar I. EchoStar I was launched during December 1995 and currently operates at the 148 degree orbital location. The satellite can operate up to 16 transponders at 130 watts per channel. During the second quarter of 2006, the satellite experienced anomalies resulting in the possible loss of two solar array strings. An investigation of the anomalies is continuing. The anomalies have not impacted commercial operation of the satellite to date. Even if permanent loss of the two solar array strings is confirmed, the original minimum 12-year design life of the satellite is not expected to be impacted since the satellite is equipped with a total of 104 solar array strings, only approximately 98 of which are required to assure full power availability for the design life of the satellite. However, there can be no assurance future anomalies will not cause further losses which could impact the remaining life or commercial operation of the satellite.
EchoStar II. EchoStar II was launched during September 1996 and currently operates at the 148 degree orbital location. The satellite can operate up to 16 transponders at 130 watts per channel. During February 2007, the satellite experienced an anomaly which prevented its north solar array from rotating. Functionality was restored through a backup system. The design life of the satellite has not been affected and the anomaly is not expected to result in the loss of power to the satellite. However, if the backup system fails, a partial loss of power would result which could impact the useful life or commercial operation of the satellite.
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 IV. EchoStar IV was launched during May 1998 and currently operates at the 77 degree orbital location, which is licensed by the government of Mexico to a venture in which we hold a minority interest. 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. As a result of past TWTA failures, only six transponders are currently available for use and the satellite has been fully depreciated on our books. There can be no assurance that further material degradation, or total loss of use, of EchoStar IV will not occur in the immediate future.
EchoStar V. EchoStar V was launched during September 1999 and currently operates at the 129 degree orbital location. The satellite was originally designed with a minimum 12-year design life. As previously disclosed, momentum wheel failures in prior years, together with relocation of the satellite between orbital locations, resulted in increased fuel consumption. These issues have not impacted commercial operation of the satellite, but have reduced the remaining spacecraft life to less than two years as of December 31, 2006. Prior to 2006, EchoStar V also experienced anomalies resulting in the loss of six solar array strings. During July 2006, the satellite lost an additional solar array string. The solar array anomalies have not impacted commercial operation of the satellite to date. Since the satellite only has a remaining life of approximately two years, the solar array failures (which would normally have resulted in a reduction in the number of transponders to which power can be provided in later years), are not expected to reduce the current remaining life of the satellite. However, there can be no assurance that future anomalies will not cause further losses which could impact commercial operation, or the remaining life, of the satellite. 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.
EchoStar VI. EchoStar VI was launched during July 2000 and is currently stationed at the 110 degree orbital location as an in-orbit spare. The satellite was originally equipped with 108 solar array strings, approximately 102 of which are required to assure full power availability for the original minimum 12-year design life of the satellite. Prior to 2006, EchoStar VI experienced anomalies resulting in the loss of 15 solar array strings. During 2006, two additional solar array strings failed, reducing the number of functional solar array strings to 91. While the design life of the satellite has not been affected, commercial operability has been reduced. The satellite was designed to operate 32 transponders at approximately 125 watts per channel, switchable to 16 transponders operating at approximately 225 watts per channel. The power reduction resulting from the solar array failures limits us to operation of a maximum of 26 transponders in standard power mode, or 13 transponders in high power mode currently. The number of transponders to which power can be provided is expected to continue to decline in the future at the rate of approximately one transponder every three years. 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.
EchoStar VII. EchoStar VII was launched during February 2002 and currently operates at the 119 degree orbital location. During March 2006, the satellite experienced an anomaly which resulted in the loss of a receiver. Service was quickly restored through a spare receiver. These receivers process signals sent from our uplink center, for transmission back to earth by the satellite. The design life of the satellite has not been affected and the anomaly is not expected to result in the loss of other receivers on the satellite. However, there can be no assurance future anomalies will not cause further receiver losses which could impact the useful life or commercial operation of the satellite. In the event the spare receiver placed in operation following the March 2006 anomaly also fails, there would be no impact to the satellite's ability to provide service to the continental United States ("CONUS") when operating in CONUS mode. However, we would lose one-fifth of the spot beam capacity when operating in spot beam mode.
EchoStar VIII. EchoStar VIII was launched during August 2002 and currently operates at the 110 degree orbital location. The satellite was designed to operate 32 transponders at approximately 120 watts per channel, switchable to 16 transponders operating at approximately 240 watts per channel. EchoStar VIII also includes spot-beam technology. As previously disclosed, the satellite has experienced several anomalies since launch, but none have reduced the 12-year estimated useful life of the satellite. However, there can be no assurance that future anomalies will not cause further losses which could materially impact its commercial operation, or result in a total loss of the satellite.
We depend on EchoStar VIII to provide service to CONUS at least until such time as our EchoStar XI satellite has commenced commercial operation, which is currently expected during the second half of 2008. AMC-14, which is expected to commence commercial operation in early 2008, also has the capability to act as a backup for EchoStar VIII and could be launched to the 110 degree orbital location, if necessary. In the event that EchoStar VIII experienced a total or substantial failure, we could transmit many, but not all, of those channels from other in-orbit satellites.
EchoStar IX. EchoStar IX was launched during August 2003 and currently operates at the 121 degree orbital location. The satellite was designed to operate 32 FSS transponders operating at approximately 110 watts per channel, along with transponders that can provide services in the Ka-Band (a "Ka-band payload"). EchoStar IX provides expanded video and audio channels to DISH Network subscribers who install a specially-designed dish. The Ka-band spectrum is being used to test and verify potential future broadband initiatives and to implement those services. The satellite also includes a C-band payload which is owned by a third party. During the fourth quarter of 2006, EchoStar IX experienced the loss of one of its three momentum wheels, two of which are utilized during normal operations. A spare wheel was switched in at the time and the loss did not reduce the 12-year estimated useful life of the satellite. However, there can be no assurance future anomalies will not cause further losses, which could impact the remaining life or commercial operation of the satellite.
EchoStar X. EchoStar X was launched during February 2006 and currently operates at the 110 degree orbital location. Its 49 spot beams use up to 42 active 140 watt TWTAs to provide standard and HD local channels, and other programming, to markets across the United States. In the event our EchoStar X satellite experienced a significant failure, we would lose the ability to deliver local network channels in many markets. While we would attempt to minimize the number of lost markets through the use of spare satellites and programming line up changes, some markets would be without local channels until a replacement satellite with similar spot beam capability could be launched and operational.
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.
Leased Satellites
We currently lease three in-orbit satellites which are being used to provide, among other things, standard and HD programming to certain local markets, international programming, backup capacity and fixed satellite service capacity on a wholesale commercial basis (rather than direct to consumers).
AMC-2. AMC-2 currently operates at the 85 degree orbital location. This SES Americom FSS satellite is equipped with 24 medium power Ku FSS transponders. Our lease of this satellite is expected to continue through 2007