Tuesday, January 26, 2016

Proton-M Rocket Carrying Eutelsat 9B Communications Satellite Set for Blastoff from Baikonur

Proton-M rocket with Eutelsat 9B satellite being erected at the Baikonur Cosmodrome. Photo Credit: Khrunichev

The International Launch Services (ILS) company is all set to launch its Proton-M rocket on Friday, Jan. 29, slated to deliver the Eutelsat 9B communications satellite into orbit. Liftoff will take place at 5:20 p.m. EST (22:20 GMT) from the Launch Pad 39 at the Baikonur Cosmodrome in Kazakhstan.

The launch was initially planned for Jan. 25 but was delayed due to weather-related logistical issues. Currently, the Proton-M booster is erected on the launch pad and is ready for the final processing before the scheduled liftoff.

On Sunday, Jan. 24, the rocket was transferred from the processing and testing facility to the fueling area where the upper stage low-pressure tanks were filled. Next day, the technical specialists completed the assembly of the launch vehicle including the mechanical and electrical mating of the Proton-M booster with the ascent unit, consisting of the satellite, the adapter system and Briz-M upper stage. Finally, the rocket was rolled out to the launch pad on Jan. 26.

Proton-M will use a standard ascent profile to place the Briz-M upper stage together with the satellite into a sub-orbital trajectory. Then, the upper stage will perform a series of planned maneuvers that will end in injection of the spacecraft into a geosynchronous transfer orbit (GTO). The Eutelsat 9B satellite will separate from the upper stage about 9 hours and 12 minutes after launch.

Eutelsat 9B, built by Airbus Defence and Space, is a high-capacity Ku-band communications satellite. Eutelsat company that will operate this satellite for up to 15 years, states that it was designed to address high-growth video markets in Europe by providing wide coverage for channels seeking maximum reach into satellite homes and terrestrial headends. The satellite will also include four regional footprints to address high-growth linguistic digital TV markets in Italy, Germany, Greece and the Nordic/Baltic regions.

Weighing approximately 5.2 tons, the satellite is based on the Eurostar E3000 platform. This bus can accommodate over 100 transponders, a large number of antennas, and payload power ranging from 4 kW all the way to 14 kW. The Eutelsat 9B spacecraft features two deployable solar arrays and is fitted with 56 Ku-band transponders, connected to a broad European widebeam and four regional beams over European countries.

The first Eutelsat satellite, named Eutelsat I F-1 was launched on June 16, 1983 by an Ariane 1 rocket from Europe’s spaceport in Kourou, French Guiana.

The company, established in 1977, currently operates a fleet of 39 satellites located in geosynchronous orbit between 116 degrees West and 172 degrees East.

Eutelsat 9B will host the first data relay payload for the European Data Relay Satellite (EDRS) System being implemented through a Public–Private Partnership (PPP) between the European Space Agency and Airbus Defence and Space. Dubbed the ‘SpaceDataHighway’, EDRS will uniquely provide near-realtime Big Data relay services using cutting-edge laser technology. According to ESA, it will dramatically improve access to time-critical data, aiding disaster response by emergency services and maritime surveillance.

The EDRS system of telecommunication satellites in geostationary orbit will allow very high data rate, bi-directional data relay communications between low Earth orbit (LEO) Earth observation satellites and an associated ground segment.

The satellite that will be delivered into space together with Eutelsat 9B is designated EDRS-A and is the first of two spacecraft in this system.

“The role of EDRS-A is to be a relay satellite for information like videos, images, and data collected by other sensors, taken by Earth observation satellite, drones and surveillance aircraft. The SpaceDataHighway satellites will establish high speed laser communications with these platforms and retransmit those information to the ground in near real time,” Bruno Daffix, Head of the Communications, Intelligence and Security business at Airbus Defence and Space, told SpaceFlight Insider.

The second EDRS satellite, designated EDRS-C, will be launched in 2017 atop an Ariane 5 rocket.

When fully deployed, the system will relay up to 50 terabytes of data from space to Earth every day. It will be also used by the International Space Station (ISS) to communicate with the ground, supporting its usual functions, such as live video transmissions or sending the results of experiments to the ground from Europe’s Columbus research module.

The 190 feet tall (58 m) Proton-M booster that will be used for the Friday launch is 13.5 feet (4.1 m) in diameter along its second and third stages, with a first stage diameter of 24.3 feet (7.4 m). The overall height of the Proton booster’s three stages is 138.8 feet (42.3 m).

The first stage consists of a central tank containing the oxidizer surrounded by six outboard fuel tanks. Each fuel tank also carries one of the six RD‑276 engines that provide power for the first stage. The cylindrical second stage is powered by three RD-0210 engines plus one RD‑0211 engine. The third stage is powered by one RD-0213 engine and a four-nozzle vernier engine. Guidance, navigation, and control of the Proton-M during operation of the first three stages is carried out by a triple redundant closed-loop digital avionics system mounted in the Proton’s third stage.

The Briz-M is powered by one pump-fed gimbaled main engine. This stage is composed of a central core and an auxiliary propellant tank that is jettisoned in flight following depletion. The Briz-M control system includes an onboard computer, a three-axis gyro stabilized platform, and a navigation system. The quantity of propellant carried is dependent on specific mission requirements and is varied to maximize mission performance.

Friday’s mission will be the first launch conducted by ILS in 2016. Next ILS flight is planned for Apr. 23, when a Proton-M rocket will lift off with the Intelsat 31 communications satellite.

No comments:

Post a Comment