CSTS - AbsoluteAstronomy.com

CSTS or ACTS (Advanced Crew Transportation System) is a human spaceflight

Human spaceflight

Human spaceflight is spaceflight with humans on the spacecraft. When a spacecraft is manned, it can be piloted directly, as opposed to machine or robotic space probes and remotely-controlled satellites....

system proposal. It was originally a joint project between the European Space Agency (ESA)

European Space Agency

The European Space Agency , established in 1975, is an intergovernmental organisation dedicated to the exploration of space, currently with 18 member states...

and the Russian Space Agency (FKA), but is now solely an ESA project. It aims to design a spacecraft for low earth orbit

Low Earth orbit

A low Earth orbit is generally defined as an orbit within the locus extending from the Earth’s surface up to an altitude of 2,000 km...

operations such as servicing the International Space Station

International Space Station

The International Space Station is a habitable, artificial satellite in low Earth orbit. The ISS follows the Salyut, Almaz, Cosmos, Skylab, and Mir space stations, as the 11th space station launched, not including the Genesis I and II prototypes...

but also capable of exploration of the Moon and beyond. This study was conceived as a basic strategic plan to keep a viable European human space program alive because NASA officials have announced that NASA's Vision for Space Exploration

Vision for Space Exploration

The Vision for Space Exploration is the United States space policy which was announced on January 14, 2004 by President George W. Bush. It is seen as a response to the Space Shuttle Columbia disaster, the state of human spaceflight at NASA, and a way to regain public enthusiasm for space...

Orion spacecraft

Orion (spacecraft)

Orion is a spacecraft designed by Lockheed Martin for NASA, the space agency of the United States. Orion development began in 2005 as part of the Constellation program, where Orion would fulfill the function of a Crew Exploration Vehicle....

will be developed without participation of international partners. CSTS had completed an initial study phase, which lasted for 18 months from September 2006 to spring 2008, before the project was shut down before an ESA member state conference in November 2008. However, the head of the ESA denies that the ATV evolution plan is an alternative and talks are still ongoing as to whether or not to continue funding the ACTS plan. As of late November 2008, the project funding has been limited to a feasibility study with a launch of an actual vehicle possible no earlier than 2017.

In 2009 Russia decided it would go with a version of the original design of the CSTS and renamed it the "PPTS

Prospective Piloted Transport System

PPTS , unofficially called Rus, is a project being undertaken by the Russian Federal Space Agency to develop a new-generation manned spacecraft...

" or Prospective Piloted Transport System. The European ESA has decided to go with an ACTS (Advanced Crew Transportation System), an evolution of the CSTS, craft that is an upgraded manned version of the ATV spacecraft. The ACTS follows the format of the Russian Soyuz craft by having a separate descent/ascent module and a detachable orbital module. The descent module somewhat resembles the American Apollo spacecraft

Apollo spacecraft

The Apollo spacecraft was composed of five combined parts designed to accomplish the American Apollo program's goal of landing astronauts on the Moon by the end of the 1960s and returning them safely to Earth...

command module while the orbital module resembles a man-rated version of the ATV. In mid-2009 EADS Astrium was awarded a €21 million study into designing a manned variation of the European ATV vehicle which is believed to now be the basis of the ACTS design.

CSTS as answer to the Orion

In 2004 George W. Bush

George W. Bush

George Walker Bush is an American politician who served as the 43rd President of the United States, from 2001 to 2009. Before that, he was the 46th Governor of Texas, having served from 1995 to 2000....

announced the Vision for Space Exploration

Vision for Space Exploration

, a program that includes the United States return to the Moon by 2020 and a manned mission to Mars by 2030.

For these purposes the Crew Exploration Vehicle, Orion

Orion (spacecraft)

, is currently being developed. ESA officials have inquired whether they could be part of this program for exploration, however received a negative response. Jean-Jacques Dordain

Jean-Jacques Dordain

Jean-Jacques Dordain is the current Director General of the European Space Agency and has held the position since 2003....

, ESA's General Director stated with regard to this rejection by NASA: "I have been told by Mike Griffin and Marburger that the CEV is not for international cooperation. But if Europe is not involved in the next-generation transportation systems, we will stay forever a second-class partner."

In a July 2006 interview with New Scientist, NASA Administrator Mike Griffin however suggested interest in international cooperation in the general context of NASA's Moon exploration plans. "The US will return to the Moon but we think we will do it better, that it will be more rewarding for all, if it can do it in the company of as many of our ISS partners as we can, and with new partners." In this statement Griffin speaks of a general cooperation, not a cooperation in developing the Orion, the actual vehicle to be used for Moon missions, which will be an entirely American built spacecraft.

Because the Orion will not be developed or used in cooperation with ESA, ESA faces a major obstacle for continuation of its manned spaceflight program with the end of the Space Shuttle

Space Shuttle

The Space Shuttle was a manned orbital rocket and spacecraft system operated by NASA on 135 missions from 1981 to 2011. The system combined rocket launch, orbital spacecraft, and re-entry spaceplane with modular add-ons...

program in 2011 and the contemplated end of the International Space Station

International Space Station

program by 2015/2016.

Cooperation with Russia

Since 2004, ESA had been in talks with FKA on cooperation for the development of Kliper

Kliper

Kliper is a partly reusable manned spacecraft, proposed by RSC Energia.Designed primarily to replace the Soyuz spacecraft, Kliper has been proposed in two versions: as a pure lifting body design and as spaceplane with small wings...

, the Russian successor project to the Soyuz

Soyuz spacecraft

Soyuz , Union) is a series of spacecraft initially designed for the Soviet space programme by the Korolyov Design Bureau in the 1960s, and still in service today...

spacecraft which has been in service for nearly 40 years. While ESA's management was enthusiastic about this cooperation, ESA member states turned down funding for a design and collaboration study in December 2005, mainly because certain member states felt that ESA would just be a minor industrial contributor to the program, while Russia would actually develop and design the Kliper spacecraft.

On the Russian side, the concept of Advanced Crew Transportation System, ACTS, conceived as a sort of "Euro-Soyuz", emerged during 2006, when Russian authorities realized that their proposal to replace the Soyuz with the Kliper was too ambitious in terms of funding.

After the December 2005 rejection of Kliper by ESA, Jean-Jacques Dordain

Jean-Jacques Dordain

Jean-Jacques Dordain is the current Director General of the European Space Agency and has held the position since 2003....

emphasized that a collaboration with Russia on a new spacecraft could still be decided in June 2006. On June 13, 2006 the press reported that the winged Kliper

Kliper

project has been replaced by a study to develop a capsule under the Advanced Crew Transportation System program that ESA is funding. This rejection by ESA notwithstanding, Kliper

Kliper

was a Russian program that might still be funded entirely by FKA - although this is unlikely if Russia and Europe really go forward with CSTS together. Reasons for going with CSTS include that it gives Europe the possibility to be a full partner in a Russian-European program, because the modular structure (see below) allows for a division of design responsibilities between the partners (for instance, Russia could be in charge of the overall design of the reentry capsule, while ESA works on the habitation module etc.)

About €15 million were pledged for the CSTS program at ESA's regular meeting on June 21 and June 22, 2006. Further funding of the study was to have been asked for at the next ESA meeting in July. Both partners, Russia and ESA, will bear their own costs in the first 2 years of the program. "We are now entering a phase of working with the Russians where we will establish a preliminary design of the vehicle, establish all the legal framework for the operation, delineate the work share for the parties, and outline the aspects of development," said Manuel Valls, head of Policy and Plans Department in ESA's Directorate of Human Spaceflight, Microgravity, and Exploration Program.

On July 4, 2006 Russian media reported that the head of the Russian Space Agency Anatoly Perminov had met with Jean-Jacques Dordain

Jean-Jacques Dordain

Jean-Jacques Dordain is the current Director General of the European Space Agency and has held the position since 2003....

to discuss the CSTS proposal; however, no agreement was signed between the Russians and Europeans as a result.

On July 18, 2006 Anatoly Perminov, head of FKA, announced that the Russian tender for the Kliper

Kliper

spacecraft had been cancelled. It was noted that the ACTS proposal had gained more support among ESA member states than the Kliper design.

Farnborough Air Show

Jean-Jacques Dordain

Jean-Jacques Dordain is the current Director General of the European Space Agency and has held the position since 2003....

announced on the Farnborough Air show on July 25, 2006 that the collaborative study together with FKA on the ACTS spacecraft would begin in September 2006 and end early in 2008: So in 18 months' time we will have got a proposal to make to our ministers for the development of such a vehicle. It was confirmed that ESA's financial contribution to this study would be 15 million EUR, shared among seven ESA member states. The work areas of the study are:

preliminary system design examining the vehicle's configuration
detailed subsystem design including a docking mechanism
development of co-operation mechanisms and agreements, as well as workshare decisions for a full-scale development
manned lunar flights

Overall Design

After the initial study phase was completed in May 2008, FKA and ESA announced that the overall design chosen was a conical manned capsule with an ATV-derived service module. The CSTS spacecraft should have had a total mass of 18,000 kg. However, the capsule and service module combined mass may not have been that much.

Possibilities of missions beyond LEO

Manuel Valls, head of Policy and Plans Department in ESA's Directorate of Human Spaceflight, Microgravity, and Exploration Program noted on the question of available launch vehicles for the CSTS spacecraft that "although nothing at this stage is definitive, [...] both the Russians and we think that it is only prudent, and most efficient and effective, to go with 2 stages and not one. The 1-stage has been done already with Saturn V and Apollo. To do that now would entail the development of quite a new launcher and that will take time and money like hell, if I may say. Going with two stages is far more effective [...] because we could use – and this is our intention – existing launch vehicles or launch vehicles with minimal development." This means that CSTS would have had a tight mass budget, as only launchers with a maximum payload capacity in the class of Ariane 5

Ariane 5

Ariane 5 is, as a part of Ariane rocket family, an expendable launch system used to deliver payloads into geostationary transfer orbit or low Earth orbit . Ariane 5 rockets are manufactured under the authority of the European Space Agency and the Centre National d'Etudes Spatiales...

, Proton

Proton rocket

Proton is an expendable launch system used for both commercial and Russian government space launches. The first Proton rocket was launched in 1965 and the launch system is still in use as of 2011, which makes it one of the most successful heavy boosters in the history of spaceflight...

or Angara

Angara rocket

The Angara rocket family is a family of space-launch vehicles currently under development by the Moscow-based Khrunichev State Research and Production Space Center...

will be available for a launch. With two launches and LEO

Low Earth orbit

A low Earth orbit is generally defined as an orbit within the locus extending from the Earth’s surface up to an altitude of 2,000 km...

docking that means that CSTS together with an Earth Departure Stage

Earth Departure Stage

The Ares V Earth Departure Stage was a rocket stage which NASA planned to design at its Marshall Space Flight Center in Huntsville, Alabama as part of Project Constellation...

will not be able to weigh more than about 45 to 50 tonnes in LEO (note however that this is just for the lunar spacecraft, a lunar lander is not integrated in this calculation).

An ESA presentation from June 13, 2006 however presents a lunar orbital mission of the CSTS spacecraft with 3 launches, of which two are propulsion modules to propel the spacecraft to a trans-lunar trajectory. Such a scenario, while more complicated than the 2-stage approach mentioned by Manuel Valls, gives more leeway in terms of the CSTS' mass budget.

EADS Astrium Space Transportation concepts for adapting the Ariane 5 ECB for lunar exploration could increase Ariane 5 LEO performance to 27 tonnes . These performance adaptions would entail the use of a composite solid rocket casing, and upgrades to the Vulcain Mk III and Vinci (ECSB) engines.

Launch Sites

Both the ESA's site at French Guiana

Centre Spatial Guyanais

The Guiana Space Centre or, more commonly, Centre Spatial Guyanais is a French spaceport near Kourou in French Guiana. Operational since 1968, it is particularly suitable as a location for a spaceport due to its proximity to the equator, and that launches are in a favourable direction over water...

and the planned Russian spaceport at Vostochny

Vostochny Cosmodrome

The Vostochny Cosmodrome is a planned Russian spaceport, to be located at 51 degrees north in the Amur Oblast, in the Russian Far East. It is intended to reduce Russia's dependency on the Baikonur Cosmodrome, which is located in Kazakhstan...

were considered as launch sites for the CSTS spacecraft. It has not yet been decided yet what launcher would carry the spacecraft to orbit, however Manuel Valls indicated that beside a Russian rocket, Ariane 5

Ariane 5

could possibly also function as the carrier rocket.

Competition within Europe

At about the same time as FKA and ESA announced their plans for the CSTS spacecraft, the German space agency DLR

German Aerospace Center

The German Aerospace Center is the national centre for aerospace, energy and transportation research of the Federal Republic of Germany. It has multiple locations throughout Germany. Its headquarters are located in Cologne. It is engaged in a wide range of research and development projects in...

together with EADS Astrium

EADS Astrium

Astrium Satellites is one of the three business units of Astrium, a subsidiary of EADS. It is a European space manufacturer involved in the manufacture of spacecraft used for science, Earth observation and telecommunication, as well as the equipment and subsystems used therein and related ground...

announced their support for the ATV evolution proposal. This proposal envisions the development of a modified ATV with a reentry capsule that would be used to return cargo from the ISS by 2013 and in a second phase a manned vehicle based on this modified ATV by 2017. Those dates were later revised to 2015 and 2020 respectively. This proposal was presented to ESA's governing body at its meeting in November 2008 and received funding for an initial development phase of a cargo return vehicle that may be ready by 2017. The ATV Evolution concept may have contributed to the end of the CSTS project. However, the head of the ESA denies that the ATV evolution plan is an alternative and talks are still ongoing as to whether or not to continue funding the ACTS plan.

As of 2009 Russia has decided to keep the general design of the CSTS spacecraft for their new manned spacecraft while Europe has decided to take on a solo project modeling the ACTS after the ATV craft that carries supplies to the International Space Station.

External links

The source of this article is wikipedia, the free encyclopedia. The text of this article is licensed under the GFDL.

CSTS as answer to the Orion

Cooperation with Russia

Farnborough Air Show

Overall Design

Possibilities of missions beyond LEO

Launch Sites

Competition within Europe

See also

External links