Use of the ASTER satellite images for evaluation of structural changes in the Popocatépetl volcano related to microseismicity

Mexico is one of the most volcanically active regions in North America. Volcanic activity in central Mexico is associated with the subduction of the Cocos and Rivera plates beneath the North American plate. Periods of enhanced microseismic activity, associated with the volcanic activity of the Popocatépetl volcano are compared with periods, during which the microseismic activity was low. We detected systematical changes in the number of lineaments, associated with the microseismic activity due to lineament analysis of a temporal sequence of high resolution satellite images of the Popocatépetl volcano, provided by the ASTER/VNIR instrument. The Lineament Extraction and Stripes Statistic Analysis (LESSA) software package was used for the lineament extraction. In the future it would allow develop a methodology for detection of possible elevation of pressure in volcano edifice.     

Attitude determination with GPS: experimental results

An approach to global positioning system (GPS) attitude determination and the results of an experimental evaluation are presented. The most outstanding features of the method are the fundamental observable used for attitude calculation, the triple difference, and the introduction of a new parameter, the differential dilution of precision (DDOP), which relates the GPS satellite geometry to the GPS accuracy when measuring angular magnitudes. The experiment used two commercial off-the-shelf GPS C/A code receivers delivering integrated Doppler measurements. The algorithm is robust with respect to phase cycle slips and does not require solving the usual integer ambiguity of the measurements. The preliminary results show that absolute attitude determination requires a calibration of the baseline and that the relative attitude accuracy is on the order of 0.1° or 2 mrads for the case of a 2-m-long baseline     

The need for a United Nations space policy

The international community is entering an era of shared global utilities from space and is increasingly reliant on space systems and activities that support a myriad of applications and utilities on Earth. A growing number of states are seeking to develop or extend their space capabilities. At the same time, a variety of non-state actors are also extending their involvement in space activities. The United Nations is the principal inter-governmental forum to deal with various space issues of global importance. Moreover, the United Nations system itself has become increasingly reliant on space systems for its day-to-day operations. In order for the United Nations to play its necessary role in the space arena, it will need to be supported by a space policy. A United Nations space policy would provide over-arching guidance on space activities for UN stakeholders in the space arena; it would inform UN participation in space activities and would promote improved coordination and cooperative governance of outer space activities. A world without a common UN space policy will not be able to respond to the challenges of the rapidly evolving space arena in the 21st century.     

Architectural design for space tourism

The paper describes the main issues for the design of an appropriately planned habitat for tourists in space.Due study and analysis of the environment of space stations (ISS, MIR, Skylab) delineate positive and negative aspects of architectonical design. Analysis of the features of architectonical design for touristic needs and verification of suitability with design for space habitat.Space tourism environment must offer a high degree of comfort and suggest correct behavior of the tourists. This is intended for the single person as well as for the group. Two main aspects of architectural planning will be needed: the design of the private sphere and the design of the public sphere.To define the appearance of environment there should be paid attention to some main elements like the materiality of surfaces used; the main shapes of areas and the degree of flexibility and adaptability of the environment to specific needs.     

The African Leadership Conference on Space Science and Technology for Sustainable Development

The African Leadership Conference on Space Science and Technology (known as “the ALC”) is a regional conference to promote intra-African cooperation in the uses of space science and technology to support Africa’s development. The first such conference was held in 2005 in Abuja, Nigeria, followed by South Africa (2007), Algeria (2009) and Kenya (2011). The ALC has come to be regarded as a representative African forum in the global space community. This paper provides an overview of the structure and activities of the ALC and presents the highlights and outcomes of the first four conferences and their contribution to shaping the development of the African space arena. The paper concludes with an analysis of the challenges facing the ALC and some proposed measures to enhance its effectiveness.     

Is there a need for an African space agency?

Over the past few years, the view has been expressed in some quarters that Africa should establish a continental space agency. Various arguments are advanced for this, but they are generally not compelling and rely mostly on pointing to the existence of other regional space cooperation organisations, or to benefits that are debatable. The article considers these arguments and concludes that there is an insufficient case for the establishment of an African space agency at this point in the development of the space arena in Africa. Instead, greater emphasis should be placed on strengthening nascent national space programmes, fostering intra-regional cooperation and raising the profile of space activities in Africa's national and regional political structures.     

Criteria for developing and testing Transparency and Confidence-Building Measures (TCBMs) for outer space activities

Space systems play an important role in sustaining the development, prosperity and security of many nations. As more nations become critically reliant on space systems, questions of maintaining safety and strategic stability in outer space have come to the fore. Transparency and Confidence-Building Measures (TCBMs) for outer space activities have an important role to play in providing clarity about the intentions of States and in articulating norms of behaviour in outer space. TCBMs take several forms. They may be the elaboration of basic principles related to the exploration and use of outer space, political measures related to establishing norms of conduct, information-sharing activities to improve the transparency of outer space activities, operational practices which demonstrate a commitment to mutual cooperation in outer space, or consultative mechanisms. We present an analytical framework for evaluating potential TCBMs and illustrate the application of this framework to examples of potential operational, regulatory, treaty-based and declaratory TCBMs.     

Space WARC-85: much left undone

Dr Martinez reports here on the ITU Space WARC-85 conference, Geneva, August–September 1985. This report outlines the salient decisions of the conference and considers their implications for the Conference's second session in 1988.