首页 | 本学科首页   官方微博 | 高级检索  
相似文献
 共查询到20条相似文献,搜索用时 156 毫秒
1.
The X-38 Project forms part of the “X” prototype vehicle family developed by the United States. Its development was initiated by NASA to prepare the Crew Return Vehicle (CRV). The European participation in the X-38 Program has been significantly extended since the start of the X-38 cooperation in 1997 and is realized by ESA's “Applied Reentry Technology Program” and the German/DLR “Technologies for Future Space Transportation Systems” (TETRA) Project. European contributions to the X-38 Vehicle 201, (V-201) can be found in all technical key areas. The orbital flight and reentry with the X-38 V-201 will conclude the X-38 project in 2002.The CRV will be used from about mid-2005 as ’ambulance‘, ’lifeboat‘ or as alternate return vehicle for the crew of the International Space Station. Recognizing the very productive and mutually beneficial cooperation established on X-38, NASA and ESA have decided to continue this cooperation into the development of the operational CRV. The Phase C/D will be completed shortly after the Critical Design Review, scheduled for August 2002. The CRV production phase will start in October 2002 and will cover production of four CRV vehicles, ending in 2006.Based on the objective to identify a further evolution potential of the CRV towards a Crew Cargo Transfer Vehicle (CCTV), NASA has implemented upgrade studies in the CRV Phase C/D.  相似文献   

2.
Daniel Goldin set the record for longevity as administrator of NASA, serving from 1992 to 2001. Active and controversial, he was unusually visible as a self-proclaimed ‘agent of change’. Coping with a turbulent political environment, Goldin directed NASA from the end of the Cold War to the early 21st century. He effected change in the multitude of programs under his aegis, especially the Space Station and robotic Mars program. He was hailed at one point as a miracle worker and poster boy of government reinvention for his ‘faster, better, cheaper’ strategy of ‘doing more with less’. But Goldin left the agency under fire for cost overruns and reforms that reached too far. Using a policy innovation process approach, this paper traces Goldin's eventful years at NASA, his policy ends and administrative and technological means. It analyzes the record of success and failure of one of the most, influential administrators in NASA history. That record provides useful lessons for how an administrator gains, uses, and loses power in the US space policy system.  相似文献   

3.
In London on 20 September, the British National Space Centre and the Royal Astronomical Society convened a ‘Town Meeting’, a usage picked up from NASA. Basically it was a debate without the competetive element, whose topic was the next two of the European Space Agency's four ‘Cornestone’ projects for the ‘Horizon 2000’ programme, total budget 584 million ECU (about £467 million). The question in September was which would be no. 3 and which no. 4. Duncan Lunan reports on the discussion and the choices made.  相似文献   

4.
The conventional wisdom holds that the Space Shuttle programme has been a ‘policy failure’ because NASA compromised its original concept in the face of weak political commitment and inadequate funding. However, a detailed reappraisal of the history shows that this reasoning is ambiguous, counterfactual and contrary to experience. Congressional and presidential support for the Shuttle has consistently been generous despite flawed and shifting justifications for the programme advanced by NASA. Among the lessons to be learned are the need for more rigorous congressional oversight and the development of smaller, quicker and independent civil space programmes.  相似文献   

5.
At a time when scientific and commercial interest in the Moon is being reinvigorated it is becoming fashionable for ordinary individuals to ‘buy’ plots on the lunar surface, with the ‘vendors’ arguing that an absence of specific prohibition of individual private activity in space makes such action legal. It is therefore time for the legal community to address this situation by investigating just how legal such activity is—and bringing their findings to the attention of governments. This can be done through an examination of the relationship between national law and international space law, of the provisions of international space law—especially Article 2 of the Outer Space Treaty—and by answering any claims to private ownership of immovable property. Aside from the fact that individuals appear to be being duped, the pursuit of property claims on the Moon could impede future activities aimed at benefiting society.  相似文献   

6.
Global Monitoring for Environment and Security (GMES) is an idea which originated during a meeting in Baveno, Italy, in May 1998, which generated a call for Europe to get its act together in the field of environmental monitoring from space, to define a well articulated strategy in this area and to build upon its excellent scientific research community, its proven technical prowess in Earth observation from space and its nascent political will to express its objectives in international fora related to climate change and other global environment topics. While Europe was already active in the most advanced areas of global monitoring, its rather uncoordinated efforts (even within the European Commission) lacked visibility and did not appear to fit into a clearly established strategy. The ‘Baveno initiative’ was an attempt to remedy this situation and find a place within a developing ‘European Strategy for Space’, which requires ESA and the European Union to work more closely together. GMES was extended to include the ‘security’ (in its wider sense) aspects of global monitoring, a move that produced a number of questions and misunderstandings, but which allowed many in Europe to realize that monitoring the activities of the Earth’ land masses, oceans and atmosphere do include a security dimension. GMES will eventually incorporate an implementation plan which will call upon various monitoring techniques, ambitious modelling projects and connections with society's more urgent requirements with respect to environmental protection and prevention or reduction of risks related to natural hazards. This will entail significant efforts to inform the user communities and to convince them of the relevance and usefulness of this initiative. It will also provide a sound basis for the European contribution to the new initiative for improved coordination of strategies and systems for Earth observations called for by the July 2003 Earth Observation Summit.  相似文献   

7.
A recent paper in this journal criticized the two methods commonly used to allocate the costs of multi-payload launches, and proposed two new alternatives. The paper argued that ‘Shapley-value’ pricing and the ‘Independent Cost Proportional Scheme’ are immune to instability problems possible under the traditional mass-proportional approach, and reduce ‘subsidies’ paid to small payloads. This rejoinder shows that neither claim is true in general. It also questions whether new pricing formulas are truly needed — or even sustainable in today's competitive market.  相似文献   

8.
With the vast experience gained by Aerospace Community in the last five decades, the natural future course of action will be to expand Space Exploration. Our understanding of Moon is relatively better with a number of unmanned satellite missions carried out by the leading Space Agencies and manned missions to Moon by USA. Also a number of unmanned satellite missions and surface rover missions were carried out to Mars by those Space agencies generating many new details about Mars. While the future exploration efforts by global community will also be centered obviously on Moon and Mars, it is noteworthy that already NASA had declared its plans for establishing a Surface Base on Moon and developing the technical infrastructure required. Surface Bases on Moon and Mars give rise to a number of strategic, technical and ethical issues both in the process of development, and in the process of establishing the bases. The strategic issues related to Moon and Mars Surface Bases will be centered around development of enabling technologies, cost of the missions, and international cooperation. The obvious path for tackling both the technological development and cost issues will be through innovative and new means of international cooperation. International cooperation can take many forms like—all capable players joining a leader, or sharing of tasks at system level, or all players having their independent programmes with agreed common interfaces of the items being taken to and left on the surface of Moon/Mars. Each model has its own unique features. Among the technical issues, the first one is that of the Mission Objectives—why Surface Bases have to be developed and what will be the activity of crew on Surface Bases? Surface Bases have to meet mainly the issues on long term survivability of humans on the Mars/Moon with their specific atmosphere, gravity and surface characteristics. Moon offers excellent advantages for astronomy while posing difficulties with respect to solar power utilization and extreme temperature variations. Hence the technical challenges depend on a number of factors starting from mission requirements. Obviously the most important technical challenge to be addressed will be in the areas of crew safety, crew survivability, adequate provision to overcome contingencies, and in-situ resource utilization. Towards this, new innovations will be developed in areas such as specialized space suits, rovers, power and communication systems, and ascent and descent modules. The biggest ethical issue is whether humankind from Earth is targeting ‘habitation’ or ‘colonization’ of Moon/Mars. The next question will be whether the in-situ resource exploitation will be only for carrying out further missions to other planets from Moon/Mars or for utilization on Earth. The third ethical issue will be the long term impact of pollution on Moon/Mars due to technologies employed for power generation and other logistics on Surfaces. The paper elaborates the views of the authors on the strategic, technical and ethical aspects of establishing Surface Bases and colonies on Moon and Mars. The underlying assumptions and gray areas under each aspect will be explained with the resulting long-term implications.  相似文献   

9.
China's advances in space include plans for a state-of-the-art space theme park, based on a new launch center, which promises to show up the outdated and ‘user unfriendly’ public visitor centers at most US space sites. Yet providing better public outreach in the form of theme parks would both inspire large numbers of the general population and provide a useful source of revenue. NASA should show more imagination in the exhibits and facilities it present to the public; it could use various science museums and Hollywood as models.  相似文献   

10.
This article follows the story of Shuttle development, in the context of the history of the US space programme from Apollo to the Space Station. The Shuttle was chosen as one of a series of ‘space spectaculars’ and has proven to be prohibitively expensive and unreliable, practical only for a very limited number of specialized missions. The Space Station, too, cannot be economically supplied, even if the USA could afford to build it. The author concludes that NASA should cancel the Space Station and the replacement orbiter for Challenger, and engage on a major programme of launch vehicle development, independent of the US military. The aim should be a dramatic reduction of launch vehicle costs, making spaceflight practical, and a truly independent NASA which could restore the USA to space preeminence.  相似文献   

11.
This article considers the thinking behind, and the ramifications of, President Reagan's Star Wars ‘vision’. The author argues that the Strategic Defense Initiative (SDI) is incompatible with other aspects of the Reagan administration's own defence policies and that the ‘security shield’ version of it would make future US-Soviet arms agreements impossible. Only the so-called ‘prudent hedge’ research looks viable in the longer term. The SDI's main value will have been in bringing the USSR back to the negotiating table.  相似文献   

12.
This viewpoint charts the historical origins of humans’ fascination with discovering, and having the possibility of visiting, outer space, arguing that acceptance of change is crucial to realizing such dreams. In the past, change was neither expected nor particularly welcomed but scientific and technological discoveries and advances––often made in the face of ‘establishment’ (e.g. Church) opposition––have persuaded people of the desirability of progress. Science fiction writers too have played a part in inspiring humans to want to explore the cosmos. Even if the current US Vision for space exploration proves politically unsustainable, today's humans will not abandon their dreams of space travel.  相似文献   

13.
The Deputy Chairman of the US Joint Chiefs of Staff offers some observations on the ‘militarization’ of space, arguing that military involvement does not necessarily mean an environment will become ‘weaponized’. He also comments on some future US space activities.  相似文献   

14.
About 100 countries now pursue their ‘public diplomacy’ interests by broadcasting audio programmes via shortwave to 400 000 000 radio listeners. However signals broadcast by surface-based shortwave transmitters are limited in coverage, reliability and quality, and shortwave broadcasting suffers from increasingly difficult operating and political problems. Space technology could now begin to be employed to create common-carrier, common-user (Intelsat- and Inmarsat-like) space-based systems which could provide a truly excellent, low-cost, direct-broadcast audio service throughout the world. The world's governments could thereby use space in a new way to promote ‘Glasnost-Openness’ for ‘the benefit of all mankind’.  相似文献   

15.
A state's posture on remote sensing of the Earth by orbiting satellites varies depending upon whether it is a ‘sensing’ or a ‘sensed’ state, upon its present economic status, and upon its economic and political history. This article considers the international legal questions related to remote sensing and discusses the political aspects with special emphasis upon the views of the Third World. The author concludes that, unless Third World states and others who support them alter their views somewhat, it is probable that remote sensing of natural resources will continue without specific legal guidelines.  相似文献   

16.
Roy Gibson   《Space Policy》2007,23(3):155-158
In reviewing the past 50 years of international space cooperation, much of it stunningly successful, some bedevilled by difficulties, the author notes that ‘space’ can now only be understood as a complex area of widely varied sectors, further complicated by different funding sources and dual-use activities. While scientists were the initial drivers of cooperation, their flourishing programmes risk losing government funding to the grandiose manned missions being envisaged. Such funding is strongly reliant on political will rather than on the merits of any particular programme, something that, until recently with the GEO, has been particularly evident in earth observations. A major problem has been countries’ efforts to secure some minor national advantage at the expense of the bigger picture. But for international space cooperation truly to benefit humanity, a greater acceptance of working for the common good and more efficient programme management (no duplication) will be required.  相似文献   

17.
A selection of light weight scientific instruments originally designed for major international missions but which, because of their modest resource requirements, can now in addition be flown aboard ‘small’ to ‘micro’ satellites are, briefly, described. These instruments have the capability to either make measurements of constituents of the Earth's energetic particle environment, or provide detailed monitoring of multiple parameters of the cold terrestrial ionospheric plasma. Scientific reasons for flying such instruments in LEO are, in each case, advanced. Individually, they constitute representative examples of a mature genre of commercially available (a cost parameter of £100k/kg can be achieved), light weight, space qualified, instruments which can contribute significantly to the implementation of first class scientific programs aboard small/micro satellites. Uniquely fault tolerant data processing units are a feature of these devices.  相似文献   

18.
Charles Cockell   《Space Policy》2002,18(4):263-266
During the past decade new questions in science have emerged that require broad inter-disciplinary approaches. ‘Do asteroids and comets cause extinctions?’ and ‘Was there, or is there, life on Mars?’ are just two examples of questions that cut across planetary or astronomical sciences and biological sciences. The re-emergent science of ‘astrobiology’ represents a new synthesis of inter-disciplinary thinking that in many respects bears similarities to what in the 18th and 19th century would have been called ‘Natural Sciences’. But new astrobiology offers the scientific community, including the space community, two important possibilities. First, an opportunity to galvanize diverse scientific disciplines together to answer some fundamental questions on the relationship between life and the cosmic environment and, second, a chance to create a new environment conducive to interdisciplinary thinking. This is in contrast to the general trend that occurred during the 20th century towards increasing specialization in the sciences. During the 21st century astrobiology has the potential to open rich and productive seams of research.  相似文献   

19.
Space ethics and protection of the space environment   总被引:1,自引:1,他引:0  
Mark Williamson   《Space Policy》2003,19(1):47-52
The construction of the International Space Station in low Earth orbit and the formulation of plans to search for life on Mars indicate that mankind is intent on making the space environment part of its domain. Publicity surrounding space tourism, in-space ‘burials’ and the sale of lunar ‘real estate’ suggests that, some time in the 21st century, the space environment will become an extension of our current terrestrial business and domestic environment. This prompts the question of our collective attitude towards the space environment and the degree to which we should regulate its use and protect it for future generations. This article offers a pragmatic view of an ethical code for space exploration and development, as far as it relates to the protection of the space environment.  相似文献   

20.
The Space Exploration Initiative (SEI) will take mankind back to the Moon and then to Mars. Preliminary estimates of SEI life cycle cost (LCC) are central to assessing programme alternatives. SEI LCC should be estimated by identifying the additional cost to accomplish the initiative over and above the cost to sustain a ‘base’ of space activities. Results of a study of four SEI alternatives provided SEI LCC cost estimates ranging from $91 billion to $308 billion (constant 1989 US dollars) from 1992 through 2020, depending upon programme philosophy. SEI LCC will be driven by the philosophy and goals of the programme, and, given the goal of ‘permanence’, essentially indeterminate because of the open-ended time horizon.  相似文献   

设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号