Optimal Constellation Design for Maximum Continuous Coverage of Targets Against a Space Background

This paper presents a globe coverage of constellation satellite in one revisit and the regional coverage at defined latitude. This constellation seems to be very close to optimal under the maximum revisit time comparing to the results in other papers. They are produced easily by using tables and data achievements. These satellites are fully connected by crosslinks sweeping the Earth. This model is more optimal comparing to the conventional constellations that distribute satellites evenly in the space. Since satellites on the LEO orbit are side by side, in most cases, they can maintain communication continuously. This special feature allows all satellites in the constellation connecting ground at any time when a satellite is available to the stations. Length of the crosslink is allowed to reject location connection or real-time data transmission. For example, six satellites in the constellation cover the whole Earth within one revisit time and all the data are collected by two Earth stations for keeping continuous coverage. Thus, the adjacent satellites may be more efficient and provide more coverage.

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Optical Navigation Satellite Constellation Design

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.424-425.1065 ◽

2012 ◽

Vol 424-425 ◽

pp. 1065-1069

Author(s):

Jun Ao ◽

Yi Wu ◽

Chun Bo Ma

Keyword(s):

Navigation Satellite ◽

Optical Navigation ◽

Mobile Platforms ◽

Satellite Constellation ◽

Constellation Design ◽

Continuous Coverage ◽

Navigation Information

Satellite constellation has incomparable superiority compared to the single satellite, and can provide effective global intermittent or continuous coverage. This paper designs a laser navigation satellite constellation by simulating the coverage properties of single satellite. The running track of the satellite constellation covers the specified area and provides intermittent navigation information for mobile platforms.

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“Because every recipient is also a potential patient” – TV Health Programmes in the FRG and the GDR, from the 1960s to the 1980s

Gesnerus ◽

10.24894/gesn-en.2019.76009 ◽

2019 ◽

Vol 76 (2) ◽

pp. 172-191

Author(s):

Susanne Vollberg

Keyword(s):

Public Awareness ◽

West Germany ◽

Continuous Coverage ◽

Public Consciousness ◽

Television Programme ◽

East German ◽

Health And Disease ◽

Media Systems ◽

The 1960S ◽

And Function

In the television programme of West Germany from the 1960s to the 1980s, health magazines like Gesundheitsmagazin Praxis [Practice Health Magazine] (produced by ZDF)1 or ARD-Ratgeber: Gesundheit [ARD Health Advisor] played an important role in addressing health and disease as topics of public awareness. With their health magazine Visite [Doctor’s rounds], East German television, too relied on continuous coverage and reporting in the field. On the example of above magazines, this paper will examine the history, design and function of health communication in magazine-type formats. Before the background of the changes in media policy experienced over three decades and the different media systems in the then two Germanys, it will discuss the question of whether television was able to move health relevant topics and issues into public consciousness.

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