Application Of Satellite Technology Research Articles

Characteristic area-based method for continuous coverage analysis of satellites constellation

Coverage capacity analysis of satellites constellation is the basis of satellite system design and performance evaluation, which is essential in the application of satellite technology. A characteristic area based method for continuous coverage analysis is proposed in this paper. The trajectory characteristics of the Walker constellation are first analyzed. The Earth's surface is partitioned into a group of characteristic areas, and the characteristic distance theory is defined and proposed accordingly. On this basis, the formulations of the characteristic point of each characteristic area and the corresponding characteristic distance with all different situations can be analytically obtained. Additionally, sufficient and necessary conditions for continuous coverage are given accordingly. The complex continuous coverage problem can be converted to the analysis of the relations between the critical geocentric angle of the satellite coverage range and the characteristic distance. Computational results indicate the effectiveness of the proposed method and reveal the feasibility in instructing the constellation design.

In this issue of Weather

Mila Zinkova begins this issue weather of Weather with the second in a fascinating series of papers investigating the ‘mirage theory’ of the Titanic disaster with an examination of the haze reported by lookouts in ‘Titanic's mirage, part 2: Did a mysterious mirage‐associated haze camouflage the iceberg?’ on p. 151.On 24 April 2017 there was a significant remobilisation of ash deposits in southern Iceland left over from the huge eruptions of Eyjafjallajökull in 2010 and Grímsvötn in 2011. Krista Hammond and Frances Beckett investigate the specific meteorological conditions that led up to the event on p. 167 in ‘Forecasting resuspended ash clouds in Iceland at the London VAAC’.The Sumatra squall is a common and yet highly disruptive weather system that affects part of the south‐east Asia region. On p. 176, Man Yau Chan, Jeff Chun‐Fung Lo and Thomas Orton examine the structure of one event in detail with a view to understanding the dynamics in order to improve forecasting of these features in ‘The structure of tropical Sumatra squalls’.Staying in the tropics, on p. 181 in ‘Monsoon tropical cyclones: Part 3’, David Membery looks into the meteorology and impact of five destructive tropical cyclones that have affected the Arabian sea and considers the long‐term trends in their occurrence.The application of satellite technology has been a rapidly expanding field in recent years. In our final paper this month on p. 186, C. Purna Chand, M. V. Rao, K. V. S. R. Prasad and K. H. Rao bring us some important research on the use satellite sensing to estimate low‐level circulations in ‘Validation of global sea‐level pressure fields calculated from Oceansat‐2 scatterometer wind data using the UWPBL model’.

Application of China satellite data in geological hazards survey and evaluation: taking Baoji loess area as example

The development of domestic satellites has injected new vitality into the application of satellite technology in the geoscience field, and showing good application results, especially the development of high resolution satellites. This paper by using the image data of research area in 2013 and 2014 two annual Ziyuan III satellite (ZY-3), have extracted hazard-formative factors such as topography, active faults, water systems, vegetation, attempts to carry out geological hazards survey. Combined with the data of engineering geological petrofabric and rainfall in research area, to carry out susceptibility and risk assessment of the geological hazards by using the information model. It provides a demonstration for geological hazards survey, monitoring and evaluation in the loess landslide area by using domestical high resolution satellites.

The application of satellite technology in the study of geodynamic movements in the wider Zagreb area

Recognizing the fact that the region around the capital belongs seismically in one of the most vulnerable areas in the Republic of Croatia, the interdisciplinary geodynamic research was initiated which lasts for 18 years now. Since the establishment of the geodynamic network, ten series of precise GPS measurements on specially stabilized points of the geodynamic network were conducted in order to determine tectonic movements and related seismic activities in the wider Zagreb area. From all conducted measurements in the period from 1997 to 2015, the original geodetic model of tectonic movements was created. Following the analysis of geodetic and geological data, a unique interdisciplinary surface layers movement model of the research area was determined. During the 2015, PSInSAR (Persistent Scatterer InSAR) technology was included in the research and was combined with the GPS measurements. The paper describes the combination of these two methods for the period 2004 - 2009 which resulted in denser and more reliable movement model in the urban part of the research area, especially in its height component, which is very important for the safety of buildings.

Жерсеріктік технологияны қолдaнбaлы геодезиядa

Жерсеріктік технологияны қолдaнбaлы геодезиядa

A Kind of New Surface Modeling Method Based on DEM Data

Surface elevation changes greatly in the river erosion area. Due to the limitation of the acquisition equipment and cost, the traditional seismic acquisition data has sparse physical points both horizontally and longitudinally, the density of surface measurement data is not enough to survey the surface structure in detail. With the development of science and technology, and the application of satellite technology, the DEM elevation data obtained from the geographic information system (GIS) are becoming more and more accurate. In this paper, a precise modeling is performed on the surface based on the geographic information from the river erosion area and combined with the results of the surface survey control points, a good effect is achieved. Key words: River erosion area; Geographic information; Similarity coefficient; Kriging interpolation; Surface modeling; High and low frequency statics

GPS tracking for people with dementia

The ‘people versus technology’ debate is ongoing; and as the social care system becomes ever more cash‐strapped and the shortage of appropriately skilled people continues, so will this debate. One of the emerging uses of technology is the application of satellite technology to monitor the movements of people with dementia, but just how effective is the technology to not only improve the life of the client, but his or her carer too? Here, Rupert McShane and Lindsey Skelt tell of the trials they conducted and what they believe that the next steps should be.

Securing multicast in DVB-RCS satellite systems

While TV broadcasting is probably the best known application of satellite technology, satellite service providers are now expanding their services to include Internet data transmission. Consequently, security of satellite data is becoming an important issue. This article examines the current DVB-RCS security standard and identifies the principal gaps in the provision of secure multicast over DVB-RCS. The main contribution of this article is a proposal for adapting the current DVB-RCS two-way satellite standard to provide secure multicast services over satellites.

GPS Wide Area Augmentation System (WAAS)

Today, no single technology has more broad-reaching potential for worldwide civil aviation than the future applications of satellite technology. These applications represent the greatest opportunity to enhance aviation system capacity, efficiency and safety since the introduction of radio-based navigation systems more than 50 years ago. The foundation for this optimism is the Global Positioning System (GPS), a satellite-based radio navigation system operated and controlled by the United States Department of Defense (DoD). In December 1993, DoD declared GPS to be in initial operational capability (10c), which means 24 satellites are now in orbit, available and usable for satellite navigation. The Federal Aviation Agency (FAA) responded to this potential through initiation of a comprehensive satellite programme involving government, industry and users to expedite research, development and field implementation of satellite-based navigation services.

Anik E2 Over the Prairies: inter‐organizational collaboration in the application of satellite technology

Abstract This paper describes the inter‐organizational collaboration which contributed to the development and satellite‐mediated delivery of university courses to a highly dispersed, rural population. This collaboration yielded results beyond what each group of stakeholders could have achieved on its own, but the project confirms the observation of some educators that collaboration, within the context of adopting innovative procedures, is a process fraught with potential pitfalls. There are, however, some practical strategies which can encourage the partners to work together towards a common goal.

Monitoring extensive ‘buffer zones’ in Africa: An application for satellite imagery

Abstract Within the field of conservation there has been increasing concern about the fragmentation and isolation of habitats. Suggestions have been made for the implementation of ‘buffer zones’ to surround reserves in an effort to minimise the effects of adjacent land uses. These zones may also act as ‘corridors’ between reserves, an important aspect where a single reserve does not provide an effective biological unit. In certain regions of the world—for example, in sub-Saharan Africa—such zones would have to incorporate extensive tracts of land if they were to be effective. Such large areas would be difficult to monitor. This paper looks at the possible application of satellite technology as a means of monitoring broad-scale environmental changes within ‘buffer zones’. A method of mapping variation in the canopy cover of low tree and shrub savanna (Okavango region, Botswana) is described and assessed.

AUSSAT: Its Socio-Economic Development, and Q-Net

The Queensland Government is pioneering innovative applications of satellite technology for the management of government functions within the state, quickly recognising the potential of the satellite and moving to secure its use. A contract was signed for transponder 11 on aussat 1 which makes it available for operational use in late 1985. The government has for many years involved itself in coordinating the use of telecommunications in support of the management of the state: the satellite now provides the way to new horizons.

Applications of Satellite Technology to the System of Global Education

In the wake of skyrocketing advancements of information and communication technology, new avenues open up to broaden the scope of education. The utilization of space technology for regional and eventually global education has begun. The paper surveys the merits of the global dissemination of information by satellites and lists the attempts made so far.