History of Satellite Communications

Pelton, Joseph N.

doi:10.1007/978-1-4614-6423-5_35-3

Cited by 2 publications

(2 citation statements)

References 1 publication

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“…For example, Explorer 1, the first American satellite to explore the belt of charged particles trapped by the Earth, had an ACS failure. 37 The Jet Propulsion Laboratory (JPL) manufactured Explorer 1, and it was launched to fly by Jupiter-C on 31 January 1958. Its orbit inclination was 33° with a perigee of 354 km and an apogee of 2515 km.…”

Section: Acs Failuresmentioning

confidence: 99%

Advanced fault detection and diagnosis in spacecraft attitude control systems: Current state and challenges

Pourtakdoust

Mehrjardi

Hajkarim

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part G:

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A review of advanced fault detection and diagnosis (FDD) techniques in attitude control systems (ACSs) of spacecraft is presented. In the first part of the paper, several types of ACS failure scenarios with their practical solutions are presented. Next, the existing approaches to FDD are considered and classified based on different criteria, including applications and design techniques. The literature of this part showed that to enhance ACS operational safety, predictability of failure of an ACS and/or of its components as well as reducing the possibility of failure occurrence is imperative. In addition, fast FDD of various kinds of failures is necessary to guarantee the required reliability of an ACS. The second part of this study highlights challenges involved with different FDD approaches, emphasizing their practical applicability. Current research gaps in FDD techniques such as insensitive residual signal, process monitoring methods, accurate plant model design, easy-to-use software development, FDD tuning process, dealing with noisy sensor measurements, time taken for fault management, the sensitivity of FDD system to faults, and FDD robustness are further elaborated on. Subsequently, the state-of-the-art FDD and its future needs are reflected on. The results of this study could direct spacecraft manufacturers and ACS providers to focus on future needs and improve ground testing for enhanced operational reliability and redundancy.

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Section: Acs Failuresmentioning

confidence: 99%

Advanced fault detection and diagnosis in spacecraft attitude control systems: Current state and challenges

Pourtakdoust

Mehrjardi

Hajkarim

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part G:

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“…Since the beginning of the space age, significant advances in technology have built vulnerability to space weather into our society. Our heavy reliance on satellites for communications and navigation (Blanch et al, 2012;Pelton, 2016) means that ionospheric disturbances, radiation belt enhancements, and solar energetic particle events, to name just a few, are all relevant in some way to our daily lives (Cassak et al, 2017). This is clear from the existence, and growth in customer base, of centers like the National Oceanic and Atmospheric Administration's (NOAA) Space Weather Prediction Center (SWPC).…”

Section: Introductionmentioning

confidence: 99%

Challenges and Opportunities in Magnetospheric Space Weather Prediction

Morley

2020

Space Weather

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Space Weather is the study of the dynamics of the coupled Solar‐Terrestrial environment, as these dynamics impact technological systems and human activity. This paper reviews a selection of the advances, challenges, and new opportunities for magnetospheric space weather, and while the focus is on specific phenomena, many other aspects of space weather will have similar challenges and needs. As a scientific field with direct applications, the field of space weather is partly driven by imperatives from both policy and operations. We provide an introduction to some of the context in which the field exists and discuss how this might shape future developments and norms within the space weather enterprise. We briefly examine benchmarking, as a policy and operationally driven activity, as it provides immediate societal relevance and an opportunity to stretch scientific understanding. As numerical space weather prediction now becomes routine, and exascale computing is in the near future, we identify challenges relating to computational expense and big data, capturing and accounting for uncertainties, and specification of boundary conditions. Here, as with the observations supporting numerical space weather prediction, the key challenge lies in extending the lead time of predictions. We also discuss the role of data, particularly in regard to model validation and empirical modeling. Due to the growing societal impact of space weather, we also examine the relationships between space weather and its terrestrial counterpart and look at the importance of continuous evaluation, monitoring progress in predictive capability, and communication with researchers, forecasters, and end users.

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History of Satellite Communications

Cited by 2 publications

References 1 publication

Advanced fault detection and diagnosis in spacecraft attitude control systems: Current state and challenges

Advanced fault detection and diagnosis in spacecraft attitude control systems: Current state and challenges

Challenges and Opportunities in Magnetospheric Space Weather Prediction

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