Visions of exploration

The word “exploration” threads its way through every discussion of human space flight and often headlines national policy statements about the US space agency. Yet this concept, so rooted in our culture, remains remarkably ill-defined. In this paper, we examine various presumptions implicit in the term and its ramifications for federally supported space endeavors. We argue that historical examples of exploration, widely used by policy makers, often make poor models for contemporary space travel. In particular, historical precedents of exploration set up a land-biased view of discovery, a restriction which impedes full expression of the Vision for Space Exploration and its possible scientific returns. These same precedents also set up a view of discovery that is biased toward in situ human presence, a view that modern technology is rendering increasingly absurd.     

The role of the united nations in promoting international cooperation in peaceful uses of outer space

The Committee on the Peaceful Uses of Outer Space (COPUOS) was established in 1959 by the United Nations General Assembly in order to review and foster international cooperation in the peaceful uses of outer space and to consider legal issues arising from the exploration of outer space. Since its establishment, the Committee has addressed such issues as benefits from space activities, the definition and delimitation of outer space and the use of the geostationary orbit, implications of remote sensing, space sciences, space-based communications, navigation and meteorological systems, as well as use of nuclear power sources in outer space, space debris and spin-off benefits of space technology. At its session in 1996, a symposium on the ‘Utilization of micro- and small satellites for the expansion of low-cost space activities, taking into particular account the needs of developing countries’ was organized by COSPAR and IAF to complement discussions on this theme. It was noted at the symposium that the increasing number of small satellites, in particular the proposed introduction of multi-satellite ‘constellations’ at low orbits, would result in concentrations of satellite mass at certain regions of space around the Earth. Special provisions would be needed to minimize the probability of satellite breakups and collisions which might create more space debris and compromise the future of spaceflight.     

Overview and status of a mirror fusion propulsion system design study

The main goal of this paper is to describe and emphasize the important discoveries made since 1986 in the engineering design of space fusion propulsion plants.

Among the important discoveries are four fundamental design principles (DPs) which should be used when adapting candidate Earth-based fusion-electric power plants to propulsion in space.

1. DP1. Maximize direct access to space for waste radiation.

2. DP2. Operate components as passive radiators whenever possible.

3. DP3. Optimize the plasma characteristics for best specific jet power

4. DP4. Optimize mission capability versus lifetime-mass-to-orbit (LMTO).

Another discovery is a design philosophy called IDEAs (Integrated Design Environment Algorithms) which is a tool for discovering new fundamental design principles.

These discoveries allowed us to adapt, and then to optimize, an earth-based fusion-electric magnetic-mirror-fusion reactor concept for propulsion in space. The resulting design is called the Mirror Fusion Propulsion System (MFPS); and its design status is reviewed.

This work can be used as a general road map for others attempting to convert earth-based designs to propulsion in space. It also has applicability to matter-antimatter propulsion systems engineering.     

On the existence and stability of liquid water on the surface of mars today

The recent discovery of high concentrations of hydrogen just below the surface of Mars' polar regions by Mars Odyssey has enlivened the debate about past or present life on Mars. The prevailing assumption prior to the discovery was that the liquid water essential for its existence is absent. That assumption was based largely on the calculation of heat and mass transfer coefficients or theoretical climate models. This research uses an experimental approach to determine the feasibility of liquid water under martian conditions, setting the stage for a more empirical approach to the question of life on Mars. Experiments were conducted in three parts: Liquid water's existence was confirmed by droplets observed under martian conditions in part 1; the evolution of frost melting on the surface of various rocks under martian conditions was observed in part 2; and the evaporation rate of water in Petri dishes under Mars-like conditions was determined and compared with the theoretical predictions of various investigators in part 3. The results led to the conclusion that liquid water can be stable for extended periods of time on the martian surface under present-day conditions.     

‘Did you see that,grandpa Mao?’ The prestige and propaganda rationales of the Chinese space program

China has seen a dramatic acceleration in the scope and capabilities of its space program in the past decade. This has been coupled with significantly increased global economic presence and influence as well as a steady improvement of its military capabilities. China's emergence as a major world actor has encouraged the emergence of a ‘China threat’ school of thought which interprets all Chinese policy, including its space program, as an evidence of a threatening challenge to US dominance in which the pursuit of a range of military space capabilities plays a central role. This article challenges that interpretation, arguing that China's space program is the product of a range of factors including powerful domestic political and developmental rationales and that the program is overwhelmingly driven by domestic rather than international considerations, particularly in terms of the use of the program for the purposes of enhancing prestige.     

Mereological inheritance

In recent investigations of Spatial Reasoning, SpatialKnowledge Representation, and Geographic Information Systems, asignificant effort has been spent by many scholars of the areaabout the problem of representing properties of spatial objects bymeans of logical theories.An analogous effort has been the problem of analyzingthe qualitative relations which can be established between twospace regions. These investigations have led to a generalframework of the field known by the term ``mereo-topology'.Though both the above mentioned approaches have proved to besuccessful in the investigation of formal and practically relevantaspects of spatial objects, no attempt has been carried out in the direction of integrating the approaches and looking at the relationshipbetween a general logical theory of space and mereo-topology from an analytical point of view, in particular for exploiting thecombinatorial behaviour of such an integrated model.This paper intends to fill the gap and analyze the behaviour ofspatial formulae of a logical theory of space as objects which canbe classified based on the behaviour they exhibit with respect tothe parts and supertparts of the regions where they are true. Wename these categories of behaviourinheritance modalities.     

Quo vadis COPUOS?

Since 1958, the UN Committee on the Peaceful Uses of Outer Space (COPUOS) has been an international forum working to build a body of space law by universal consensus, a method of working which has been essential to ensuring the enforce-ability of its decisions. This consensus has degenerated in recent years, slowing the progress of space law — which has now fallen dangerously behind the development of space technology. Some important recent decisions have had to be taken by majority voting rather than consensus, to overcome the paralysis of COPUOS. This, however, can only be a temporary solution. The author makes an urgent plea for a return to COPOUS and its methods.     

Transforming Japan's space policy-making

Since its beginning the objective of Japanese space policy has been to ‘catch up’ with advanced spacefaring countries. However, this catching-up strategy is now facing several difficulties, because of the downturn in the economy and changing political and technological circumstances. In such circumstances the Japanese space community has realized the need to change its national space strategy. In 2005 a group of powerful Japanese politicians issued a report on constructing a national space strategy, which recommended that the government establish a new decision-making structure by creating a new Basic Law of Space Activities. These efforts underline the need for Japanese space to shift the focus of its policy from technological development to applications.     

The changing geopolitics of space activities

Traditional space relations among civilian space actors are undergoing in the post-cold war era a rapid evolution with a growing number of new institutional entities. The cold war era and its resulting political environment, which limited space cooperation to ‘intra-bloc’ cooperation, has disappeared, allowing the development of new axes and mechanisms of cooperation. The internationalization and regionalization of space activities witnessed in recent years is foreseen to gain momentum, leading therefore to a new geography of civilian space activities.     

Russian space commercialization - getting the banks involved

While the world market for space goods and services has grown enormously and continues to do so, Russia's meagre share of it is out of all proportion to its technological and intellectual base. This was initially the fault of its rigid political system, which has made it hard for companies to adapt to a market economy. This viewpoint argues that Russia's banks, which have played a major role in the country's economic reforms, should be encouraged to invest in its space industry. In particular they could finance the ‘space education’ of the business community and fund surveys and feasibility studies. In the long term this could generate large profits and would improve their standing in the world. Ultimately they might join specialist international bank associations set up to finance cooperative ventures.     

The eagle eyes the dragon in space—A critique

China's space policy and its purpose have become an increasingly contentious subject. This paper critically examines the claims, made by Ashley Tellis, among others, that China has a space strategy decided and coordinated by the Chinese military and dedicated to defeating superior US power locally in an asymmetrical war, and that it is this military space strategy that drives China's single-minded pursuit of space science and technology and the development of China's space programme. To do so, the paper conducts two investigations: into the declining role of the Chinese military in China's foreign and security policy making and its limited influence in formulating China's grand strategy; and the other into the contingent history of China's two space programs, Shenzhou and Chang'e, which have largely been driven by civilian scientist communities, rather than the military. In so doing, I argue that the claims of China's ‘military space strategy’ are over-imaginative and serve a particular political purpose. The social imaginary of a threatening China produced by the US strategic gaze at China in space, I further argue, has dangerous policy implications.     

Space activities in Korea—History, current programs and future plans

Korea has participated in space development only since the 1990s. Despite its short history, Korea has been increasing its technological capabilities with the successful experience of several national projects. The Korean government established a long-term space development plan in 1996, which suggests a clear way forward for space development up to 2015. Space activities in Korea will grow continuously. The direction of future space activities will be decided by the national space development plan. This paper discusses Korea's past and present space activities and future development projects.     

Comparative cost and utility analysis of monolith and fractionated spacecraft using failure and replacement Markov models

Failure of a single component on-board a spacecraft can compromise the integrity of the whole system and put its entire capability and value at risk. Part of this fragility is intrinsic to the current dominant design of space systems, which is mainly a single, large, monolithic system. The space industry has therefore recently proposed a new architectural concept termed fractionation, or co-located space-based network (SBN). By physically distributing functions in multiple orbiting modules wirelessly connected, this architecture allows the sharing of resources on-orbit (e.g., data processing, downlinks). It has been argued that SBNs could offer significant advantages over the traditional monolithic architecture as a result of the network structure and the separation of sources of risk in the spacecraft. Careful quantitative analyses are still required to identify the conditions under which SBNs can “outperform” monolithic spacecraft. In this work, we develop Markov models of module failures and replacement to quantitatively compare the lifecycle cost and utility of both architectures. We run Monte-Carlo simulations of the models, and discuss important trends and invariants. We then investigate the impact of our model parameters on the existence of regions in the design space in which SBNs “outperform” the monolith spacecraft on a cost, utility, and utility per unit cost basis. Beyond the life of one single spacecraft, this paper compares the cost and utility implications of maintaining each architecture type through successive replacements.     

The emerging China–EU space partnership: A geotechnological balancer

Through a techno-nationalist lens, this paper will assess the growing China–European Union (EU) space partnership, and its implications for international space cooperation and competition. Techno-nationalism (jishu minzuzhuyi), the idea that technological strength is an effective determinant of national power in a harshly competitive world,³ informs both Chinese and US perceptions of China's space development. Using this lens elevates all space activities—manned, unmanned, military and scientific—to the strategic level. It is our contention that because of the increasing China–EU space partnership, the USA must re-evaluate its approach to China—away from the containment approach, which has thus far predominated, toward an approach which would offer the USA the opportunity to influence and, thereby, decrease the importance of the emerging partnership.     

Reflection Model as Applied for the Analysis of Enhancements of Solar Cosmic Rays at Different Heliocentric Distances: An Example of the Event Observed in June 1991 onboard GRANAT and ULYSSES Spacecraft

In this paper we consider a large-scale enhancement of the intensity of solar protons (E = 1–20 MeV) observed in June 1991 for 26 days at different points of interplanetary space, onboard ULYSSES (in the time period under consideration it was located at a heliocentric distance of 3 AU, at an angular distance of 70° to the East of the Sun–Earth line and 3° to the South of the ecliptic plane) and GRANAT (which was orbiting around the Earth spending most of its flight time outside the Earth's magnetosphere). An approximation is made of the complex time profile of the enhancement of the solar cosmic ray (SCR) intensity on the basis of the reflection model of their propagation in the heliosphere. It has been established that, in this event, the transport of SCR particles in the interplanetary space was mainly carried out in the traps made up by the fronts of radially moving flare disturbances. The parameters of these fronts obtained when modeling this enhancement of SCR allow one to estimate the characteristic dimensions of the regions of effective capture of SCR. Comparison of the results of approximations obtained for the data from GRANAT and ULYSSES spacecraft demonstrated an increase in the regions of capture of SCR when the radial distance from the Sun increases.     

Canadian space policy

Canada's geography made it an early leader in the development of space technology, and generated a civilian-oriented, terrestrially focused space programme with a strong focus on communications and an increasing emphasis on transferring space technology and activity from the government to the private sector. During the 1980s Canada's space programme has strengthened and broadened measurably; its now contains major projects in Earth observation and robotics as well as communications, and has diversified its international partnerships from the USA to Europe. However, persisting weaknesses in launch capability, space science and military space programmes, and the dependence of all three current major projects (Msat, Radarsat, and the International Space Station's Mobile Servicing System) on the USA represent potential vulnerabilities which require national investments and expanded international affiliations if they are to be offset.     

Approximate qualitative spatial reasoning

Qualitative relations between spatial regions play an importantrole in the representation and manipulation of spatial knowledge.The RCC5 and RCC8 systems of relations,used in the Region-Connection Calculus, are of fundamentalimportance. These two systems deal with ideal regions havingprecisely determined location. However,in many practical examples of spatial reasoning,regions are represented by finite approximations rather than known precisely.Approximations may be given by describing how a regionrelates to cells forming a partition of the space underconsideration. Although the RCC5 and RCC8 systems have beengeneralized to ``egg-yolk' regions, in order to modelcertain types of vagueness, their extension to regionsapproximated in this way has not been discussed before.This paper presents two methods, the syntactic and the semantic, by which the RCC5 and RCC8 systemsmay be defined for approximate regions. The syntactic uses algebraicoperations on approximate regions which generalize operations on preciseregions. The semantic method makes use of the set of preciseregions which could be the intended interpretation of anapproximate region. Relationships between these two methods arediscussed in detail.alternative to navigation training with a map.     

Estonian space policy and governance in the international space community

Despite the global financial crisis, which dominated 2008 and the first half of 2009, Estonia has decided to invest in a space programme. Estonia has extensive experience in the field of astrophysics and has developed capacities in various areas of remote sensing applications. It is on its way to becoming an active ESA partner. This article examines how Estonia is setting its way as a space nation and describes the new context and the role that various bodies are playing in the process. The paper describes the vision and strategy for space activities in the country. An overview of the possible measures to be taken to support the enterprises and scientific institutions with the highest potential for space cooperation is discussed, as are various risks in making progress in the space field, and measures for overcoming these.     

On the contribution of space medicine in the public health care

With the beginning of space era, a new branch of medicine has arisen and has been developing along with human exploration of outer space. And even though space medicine mainly faces the same problems as traditional medicine--cosmonauts health care and their high efficiency--this branch, has its own features, associated with the unusual factors of space flight, of which weightlessness is the major one. During the development of manned cosmonautics (duration of a human stay in space has reached already 438 days), methods of cosmonauts medical support and monitoring of their condition have been developed, knowledge of human possibilities and methods of process of organism adaptation to various and frequently severe conditions of external environment have increased. All this led to the fact that nowadays space medicine can become useful for improvement of human health care not only in space but also on the Earth. Moreover, the problem of implementation of cosmonautics achievements, and in particular of space medicine, in practice of public health care presents one of the most important issues concerning human health care. It is also connected with public opinion which is more and more concerned about the efficiency of significant expenses on space activities, especially lately. People often are set by the questions: what has space given, what fruits has space research provided to mankind, which results of this research can be used on the Earth already today for improvement of their life, for discussion of many difficult earthly problems? In terms of using cosmonautics possibilities, its achievements for health care and treatment, it is possible to define a few branches, in which purposeful studies are carried out.     

Meeting the needs of the new millennium: passenger space travel and world economic growth

Without doubt, humans’ most urgent need at the start of the new millennium is the continuation of economic growth, which is the only means by which the great majority of the world population can lift themselves out of the poverty in which they live. A sine qua non for continuing economic growth is for the rich countries to continue to develop new industries—as they did throughout the 20th century, thereby creating high-productivity employment for hundreds of millions of people around the world. Arguably the most significant of these thus far is the development of passenger air travel from zero in 1900 to 1.5 billion passengers per year by 2000. It is becoming clear that passenger space travel could grow to reach a similar economic scale—and that no other space activity has comparable potential. The paper describes the potential contribution to world economic growth of passenger space travel; the failure of government space agencies either to aid its development or to make a contribution to economic growth commensurate to their cost; and the value for economic policy of prioritising the realisation of passenger space travel. The faster passenger space travel services grow, the more the space industry will contribute to “Meeting the Needs of the New Millennium”.