Eutelsat KA-SAT 9A

from Wikipedia, the free encyclopedia
Eutelsat KA-SAT 9A
KA-SAT artist view.png
Artist's impression of KA-SAT
Start date December 26, 2010
Launcher Proton-M
Launch site Baikonur 200/39
COSPAR-ID : 2010-069A
Takeoff mass 6150 kg
Manufacturer EADS Astrium
Satellite bus Eurostar E3000
lifespan 15 years
Stabilization Three-axis stabilized
operator Eutelsat
Playback information
Transponder 82 Ka band
Others
Electrical power 11 kW payload
position
First position 9 ° East
Actual position 9 ° East
List of geostationary satellites

Eutelsat KA-SAT 9A is a commercial communications satellite owned by Eutelsat , which provides broadband internet for Europe and the Middle East from geostationary position 9 ° E in the Ka-band . To improve the frequency utilization of his 237 MHz transponder, he uses 82 spot beams distributed across Europe, each with a capacity of 475 Mb / s.

The satellite was originally named KA-SAT . He was born on 26 December 2010, 21:51 UTC with a Proton-M carrier rocket from the rocket launch site Baikonur by the company International Launch Services brought polar orbit (ILS) into geostationary /. After nine hours and twelve minutes, the satellite separated from the last stage of propulsion and entered geostationary transfer orbit. EADS Astrium was awarded the contract for the construction in January 2008. The launch originally planned for December 20th had been postponed because the flights of the Proton-M launcher had been stopped on December 5th, 2010 after the loss of three Russian GLONASS navigation satellites had been.

The three-axis stabilized satellite is equipped with 82 Ka-band spot beam transponders and is supposed to provide high-speed internet for Eutelsat's Tooway service from 9 ° East from Europe and the Middle East. Seven of the spot beams are intended to supply Germany. The total data throughput should be over 70 GBit / s, with each spot beam providing a capacity of 900 MBit / s, which is divided into a forward and backward channel. A 0.77 m antenna on the ground is sufficient for the full bandwidth of a single connection (20 Mbit / s downlink, 6 Mbit / s uplink).

The satellite has four multispot antennas with expandable reflectors, each 2.6 m in diameter, as well as a high-precision navigation and location system that enables it to optimally cover and use the frequencies between cells that are not adjacent to one another. To operate the transponders, 800 m of microwave cables are laid in the satellite. In order to be able to cope with the volume of data, Eutelsat built a distributed network of eight earth stations (gateways) and two backup stations, each equipped with a 9.1 m antenna and connected to the central control center in SkyPark Turin via a fiber optic ring.

The ground network is operated by SkyLogic, a subsidiary of Eutelsat. One of the gateways is in Berlin-Wannsee near the Helmholtz Institute for Materials and Energy. It was based on the satellite bus built Euro E3000 EADS Astrium and has a design life of 15 years.

On March 1, 2012, Eutelsat unified the names of its satellites around the brand name.

Web links

Individual evidence

  1. ↑ ILS Launch Mission Overview ( Memento from May 13, 2015 in the Internet Archive )
  2. ↑ EADS: Astrium to build new-generation Ka-band satellite for Eutelsat ( Memento from July 15, 2010 in the Internet Archive )
  3. ↑ a b FliegerRevue July 2011, pp. 42–43, Superfast Internet from space
  4. ↑ Tooway: Eutelsat's Ka-Sat satellite successfully lofted into orbit by its Proton rocket ( Memento from January 12, 2011 in the Internet Archive )
  5. ↑ Eutelsat: Consumer broadband internet access ( Memento from July 16, 2012 in the Internet Archive )
  6. ↑ Eutelsat - One name, one group, one fleet. (No longer available online.) Eutelsat COMMUNICATIOS, March 1, 2012, archived from the original on August 19, 2012 ; Retrieved August 15, 2012 .