Eutelsat 172B

from Wikipedia, the free encyclopedia
Eutelsat 172B
EUTELSAT-172B-SATELLITE.jpg
Graphic: Eutelsat 172B in orbit
Start date June 1, 2017, 11:45 PM UTC
Launcher Ariane 5 ECA VA237
Launch site Center Spatial Guyanais
COSPAR-ID : 2017-029B
Takeoff mass 3551 kg
Dimensions 5.7 x 3.73 x 3.0 m
Span in orbit 39.3 m
Manufacturer Airbus Defense and Space
Satellite bus Eurostar E3000e
lifespan 15 years
Stabilization Three-axis stabilization
operator Eutelsat
Playback information
Transponder 47 Ku-band and 14 C-band transponders
Others
Electrical power 13 kW
position
First position 172 ° East
List of geostationary satellites

Eutelsat 172B is a commercial communications satellite owned by Eutelsat . It is intended to replace the Eutelsat 172A , but according to Eutelsat it will be used in a different position in the future.

Mission history

Eutelsat 172B was on June 1, 2017 23:45 UTC with an Ariane-5 - rocket from the rocket launch site Guiana Space Center (along with ViaSat-2 brought) into a Geotransfer train. The first tests were completed on June 8th. The satellite was then brought into geostationary orbit with electric engines, which only requires a sixth of the fuel mass compared to a chemical engine. The final position was reached on October 11th. This was the fastest orbit elevation of a satellite with an electric drive to date.

construction

The three-axis stabilized satellite with 47 Ku-band - (36 standard and 11 with high bandwidth) and 14 C-band - transponders equipped (total of 1.8 Gbps) and is from the position of 172 degrees East Asia-Pacific telecommunications services supply. The C-band transponders will serve the Asia-Pacific region with Australia and New Zealand as well as Alaska , Hawaii and the western United States. The standard Ku-band transponders are intended to supply five zones: One for the North Pacific, which extends from the west of the USA via Canada to the east of Asia with Japan and parts of China and Russia . One covers Australia and New Zealand , and another extends from New Caledonia to Papua New Guinea , Indonesia and Malaysia to Thailand and Myanmar . Another serves Japan and the Philippines, and the fifth serves a number of island states in the Southeast Pacific. The additional high-bandwidth Ku-band transponders enable eleven footprints, especially dedicated to air traffic, from the west coast of the USA via the flight routes over the Pacific and large parts of Southeast Asia. Their performance can be individually adjusted with the help of a multi-port amplifier (mpa). The propulsion system of the satellite uses only electric propulsion units of the type PPS-5000 from Safran / Snecma, which leads to a saving in mass compared to chemical propulsion units. The Hall effect thrusters have an output of 2 and 5 kilowatts, 300 to 375 volts supply voltage and use the noble gas xenon as a supporting mass. They have a thrust of 0.18 to about 0.3 Newtons, a specific impulse of 1700 to 1850 seconds and are designed for an operating time of 15,000 operating hours. The four engines are mounted in pairs on fold-out and swiveling arms. Eutelsat is the first commercial satellite operator to equip a satellite with PPS-5000 engines. Another new feature of the Eutelsat 172B is the use of an antenna support structure made from a 3D printer. Eutelsat 172B was built on the basis of the Eurostar E3000e satellite bus from Airbus Defense and Space and has a planned service life of 15 years.

Web links

Individual evidence

  1. ↑ a b c Spaceflight 101 : Eutelsat 172B - Ariane 5 VA237 | Spaceflight101 , accessed June 20, 2017.
  2. ↑ Chris Bergin: Ariane 5 conducts dual payload launch out of CSG. NASASpaceFlight.com, June 1, 2017, accessed October 12, 2017 .
  3. ↑ Eutelsat: Eutelsat's Airbus-built full electric EUTELSAT 172B satellite reaches geostationary orbit. October 11, 2017, accessed October 12, 2017 .
  4. ↑ Satellite Missions: Eutelsat 172B - eoPortal Directory - Satellite Missions , accessed June 20, 2017.
  5. ↑ raumfahrer.net: Ariane 5 launch: Eutelsat 172B and ViaSat 2 in space , accessed on June 20, 2017.