Thursday , November 26 2020

Arianespace Soyuz ST-set for the CSO-1 launch – NASASpaceFlight.com



Arianespace will make his final start of 2018 on Tuesday, using the Union for the deployment of missile high resolution satellite imagery for the French army. The union plans to break away from the center of the spatial Guyanais – near Kourou, French Guiana – at 13:37:14 local time (16:37 UTC), deploys CSO-1 payload just over an hour later.

Starting Tuesday deploy CSO-1, the first of three satellites that form Composante Spatiale OPTIQUE (CSO), or an optical space-based component. These spacecraft will provide the French military, replacing the earlier reconnaissance satellites Helios. Develop Suzorye & # 39; ie, the direction of France, Générale de l & # 39; Armement (DGA – Directorate General of weapons) entered into a partnership with the National Space Agency, the Knesset.

Airbus and defense with & # 39; is a main contractor three GSM satellites that are based around AstroSat-1000 platform. Each satellite has a mass of 3565 kg (7.859 pounds) and is expected to operate for at least ten years. Imaging systems have been manufactured by Thales Alenia Space. On a sun-synchronous orbit at an altitude of about 800 kilometers (497 miles, 432 nautical miles), the CSO-1 is expected to be able to image the Earth with a resolution of about 35 centimeters (14 inches).

CSO-1 with & # 39 is the first satellite in the third generation of reconnaissance satellites in France, followed by two vapor Helios spacecraft. The first specialized French military reconnaissance satellite Helios-1A, running on top of the Ariane 4 rocket in July 1995.

Almost identical Helios-1B was launched in December 1999 to replace it. The second-generation Helios spacecraft to image processing systems with high resolution with the following: Helios-2A was launched using the Ariane 5G + December 18, 2004 and Helios-2B launched aboard Ariane 5GS five years up to the minute. It is noteworthy that the CSO-1 is planned to raise on the anniversary of these two launches, although the start time for the mission on Tuesday, eleven minutes later than two launches Helios.

CSO-1 – via Arianespace

After all three satellites were launched, the CSO will work with the two satellites in the 800-kilometer orbit, while the CSO-2 will use a lower altitude for higher resolution images. CSO-2 mission has been described as one of identification – the distinctive features related observable satellites in higher orbits. CSO-2 is currently scheduled for launch in 2020 or 2021, with the CSO-3 coming into Suzorye & # 39; e a year or two later.

CSO-1 will be launched in Paris Arianespace, which are deployed all previous French intelligence satellites. Arianespace operates a fleet of three different types of missiles: Vega used to launch small satellites, the Ariane 5 carry heavy payloads – usually a pair of geostationary communications satellites – and the Russian Union of rocket fills the gap in capacity between the two vehicles. mission Tuesday will use Union Union PT in configuration with upper stage Frigate-M.

Soyuz ST-A is based on a Soyuz-2-1A rocket, including changes that are typical for the launch Arianespace, Center Spatial Guyanais (CSG), located near Kourou in French Guiana. Soyuz-2-1A itself is one of the three upgraded versions of the earlier missiles Union, derivatives rockets Sergey Korolev R-7, which were used for the Russian (and former Soviet) satellites and manned space flights begin from 1960.

Soyuz ST-A in the process of integration to the payload – with the help of Arianespace

Soyuz-2-1A made its first suborbital test flight in 2004, and the first orbital launch within two years. He introduced the upgraded first and second stage engines from the previous generation of Soyuz-U, as well as the digital control system of flight and other improvements. The second configuration Union-2, Union-2-1b (Arianespace manage both Union ST-B) is also upgraded third step motor. The smaller the Union-2-1v is designed to carry payloads of light, but this version is not used rocket Arianespace.

Union is a three-stage rocket and, although the first and second stages of the fire with the start. In order to reach higher orbits or perform more complex missions, the Union can be used in combination with the upper stage. For mission Tuesday Frigate-M will be used for insertion of CSO-1 in the planned sun-synchronous orbit. Frigate with 39 & # is the most common type in the upper stage spans Union; It is based on advanced propulsion systems, interplanetary probes and the Soviet Union could restart his engine several times over a long mission to ensure delivery of the payload to the desired orbit.

Running on Tuesday will be the twentieth Union flight to French Guiana. Springboard Union, ensemble de Lancement Soyouz (ELS), was first used in October 2011 to house a pair of Galileo navigation satellites. Including a vehicle that performs the task the CSO-1, six Soyuz ST-A and fourteen Soyuz ST-B rocket departed Kourou. All but one of the Union, launched from the Baikonur Kura – in Soyuz ST-B, whose Fregat booster malfunction – successfully completed its mission.

Arianespace Soyuz Launch pad in – through Arianespace

Union launches will also take place from the Baikonur Cosmodrome in Kazakhstan and Plesetsk and Vostochny cosmodrome in Russia.

Designation Arianespace mission on Tuesday with a & # 39 is VS20. Starting ignition will begin with the first and second stage motors approximately sixteen seconds to start. The first phase-A ST Union car consists of four amplifiers RDOM-motors 107Y, grouped around the second stage, which is powered by one RD-108A.

rocket engines will increase traction while rocket extend downward, reaching full capacity for the second T-1 level in the countdown. At zero, swing arm at the launch site will be opened, and the Union will begin its climb toward space.

Union of CT-A at the preliminary run – through ESA

The first and second stages of the rocket will burn together for the first minute and fifty-eight seconds of recovery. At the moment, four first-stage boosters are closed, venting excess oxygen to push their noses from the rocket as they separate. The picture is made isolation amplifiers is known as the Queen of the Cross after the chief designer of the rocket.

After the first stage separates Union will continue to fly under the force of its second stage for a further two minutes and 49 seconds. About thirty-two seconds before the end of the second phase of the flight fairing separates from the rocket nose.

The second and third stages are designed for separation while the second firing step so far. The third stage lights his RD-0110 while RD-108A still burning to provide propellant is solved in a third stage tanks. The third stage will fire for four minutes and two seconds before you deploy a frigate to continue the journey CSO-1 into orbit.

Sixty seconds after the removal from the third stage, it s5.98m Frigate ignited engine for the first of three planned burns. It will last eight minutes and fifty-two seconds by adjusting the initial parking orbit. After 35 minutes, the second phase 34 shore Frigate will fire again for another 89 seconds, circularising orbit.

CSO-1 separated from Frigate five minutes after it enters the second burn – about one hour and 44 seconds after the start. The frigate will make its third and last four seconds of the burn enough 51 minutes later, with the 55-second maneuver is to descend from orbit on the stage so as not to leave unnecessary junk in orbit.

Launch of CSO-1 with & # 39 is the eleventh and last for Arianespace in 2018, after the previous two missions of the Union, two Vega launches and six Ariane 5s. The next launch Arianespace is scheduled for the end of January with HS4-SGS1 and GSAT-31 communication satellite on board, and the Ariane 5, and the next Soyuz launch from Kourou, is expected to carry four satellites O3b in the first quarter of the new year.

Another launch is expected from the Union of Russia until the end of the year: Soyuz-2-1A / Fregat-M vehicle is scheduled to lift off the Eastern cosmodrome on December 27, with its primary payload couple Canopus-V remote control sensing satellites.


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