DirecTV-10
| DirecTV 10 | |
|---|---|
| Start date | July 7, 2007 |
| Launcher | Proton-M / Bris-M |
| Launch site | Baikonur |
| Takeoff mass | 6060 kg |
| Mass in orbit | 3700 kg |
| Dimensions | 3.7 × 3.3 × 8.0 m |
| Span in orbit | 48.1 m |
| Manufacturer | Boeing |
| Satellite bus | BSS-702 |
| lifespan | 15 years (planned) |
| operator | DirecTV |
| Playback information | |
| Transponder | 32 (+12) Ka-Band 55 (+15) Spot-Ka-Band |
| Others | |
| Electrical power | 18 kW (BOL), 16 kW (EOL) |
| Power storage | 59 NiH cells with 328 Ah capacity |
| position | |
| Actual position | 102.775 ° West |
| drive | 445 N + four 25 cm XIPS |
| List of geostationary satellites | |
DirecTV-10 is a Satellite TV , the HDTV -Television for DirecTV Users in North America offers. It was launched on July 7, 2007 by International Launch Services from the Baikonur spaceport with a Proton-M / Bris-M rocket. After two months of testing, the satellite was brought to its final position at 102.775 degrees West.
It is the first of three identical DirecTV satellites (DirecTV 10, 11 and 12) which are built on the basis of the Boeing 702 satellite bus . The contract with Boeing was signed in 2004. DirecTV-11 was launched on March 19, 2008 with a Zenit-3SL and brought to position 99.2 ° West. DirecTV-12 was originally supposed to remain on the ground as a reserve satellite , but was then transferred to geostationary transfer orbit on December 29, 2009 at 1:22 a.m. Central European time from launch pad 39 of the Russian space center Baikonur with a Proton-M / Bris-M launch vehicle brought. Nine hours later, the Bris-M upper stage placed the satellite in its intended orbit at position 102.8 west.
technology
DirecTV-10 transmits mostly MPEG-4 coded signals, which allows a more effective transmission compared to the standard channels coded in MPEG-2 and thus a larger number of channels.
DirecTV-10 and 11 are to be brought in close proximity to the satellites Spaceway -1 and Spaceway-2. These were actually developed to transmit simple broadcast and two-way Internet data on a 500 MHz wide channel. At DirecTV's request, Boeing switched off this option in order to transmit additional HDTV channels.
DirecTV-10 has 32 active and 12 reserve Ka-band transmitters for large-scale transmission of national programs as well as 55 active and 15 reserve spot transmitters for local television channels. As stations are traveling wave tubes used which UTJ- of gallium arsenide - solar panels are powered m with a span of 48.1 and 18 kW (BOL) with energy. The signals are transmitted via two Ka-band antennas, each 2.8 meters in diameter, and nine other Ka-band antennas.
Individual evidence
- ↑ DIRECTV 10th International Launch Services, accessed on September 10, 2012 (English).
- ↑ DirecTV 12 in orbit . The Orion
- ↑ Boeing: Data sheet for DirecTV 10, 11, 12 ( Memento from May 24, 2011 in the Internet Archive ) (PDF; 196 kB)