Ionospheric Drag for Satellite Formation Control

Smith, Bryan T.; Capon, Christopher; Brown, Melrose

doi:10.2514/1.g004404

Cited by 10 publications

(18 citation statements)

References 30 publications

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“…In this case, the local plasma environment may well be considered strongly magnetized. While the resulting forces would be small (estimated to be in the tens to hundreds of nN range for a CubeSat sized spacecraft), such forces are a similar magnitude to solar radiation pressure forces, and have also been proposed for propellantless propulsion for formation flying and deorbiting applications [45,46].…”

Section: Discussionmentioning

confidence: 99%

Friction in a strongly magnetized neutral plasma

Lafleur¹

2020

Plasma Phys. Control. Fusion

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A charged projectile generates an electrostatic wake as it moves through a background plasma. This wake normally gives rise to a drag force that acts antiparallel to the velocity vector of the projectile, and is commonly referred to as the stopping power. A recent theory (Lafleur T and Baalrud S D 2019 Plasma Phys. Control. Fusion 61 125 004) predicted that an additional component of the friction force that is perpendicular to both the projectile velocity and the Lorentz force arises when a plasma is strongly magnetized. We extend the previous analysis of this transverse friction force, which was based on the one-component plasma model, to treat a two-component charge-neutral electron-ion plasma. The direction and magnitude of the transverse force is found to depend on the projectile speed relative to the electron and ion thermal velocities, and to change sign three times. For projectile speeds below a certain threshold, the transverse force is dominated by collisions with ions, while above this threshold, only electron collisions contribute. The average trajectory of the projectile is significantly altered by the transverse force as it slows.

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Section: Discussionmentioning

confidence: 99%

Friction in a strongly magnetized neutral plasma

Lafleur¹

2020

Plasma Phys. Control. Fusion

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“…Satellites flying at these heights experience increased drag, causing a deceleration in the orbital direction and loss of altitude. Manual intervention often must be taken to ensure the nominal orbit of the spacecraft is maintained (Capon et al, 2019;Smith et al, 2019). A notable recent example of this phenomenon was in February 2022, when 38 SpaceX Starlink satellites re-entered Earth's atmosphere after a space weather event (Dang et al, 2022;Hapgood et al, 2022).…”

Section: Satellite Infrastructurementioning

confidence: 99%

How open data and interdisciplinary collaboration improve our understanding of space weather: A risk and resiliency perspective

Ledvina

Palmerio

McGranaghan

et al. 2022

Front. Astron. Space Sci.

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Space weather refers to conditions around a star, like our Sun, and its interplanetary space that may affect space- and ground-based assets as well as human life. Space weather can manifest as many different phenomena, often simultaneously, and can create complex and sometimes dangerous conditions. The study of space weather is inherently trans-disciplinary, including subfields of solar, magnetospheric, ionospheric, and atmospheric research communities, but benefiting from collaborations with policymakers, industry, astrophysics, software engineering, and many more. Effective communication is required between scientists, the end-user community, and government organizations to ensure that we are prepared for any adverse space weather effects. With the rapid growth of the field in recent years, the upcoming Solar Cycle 25 maximum, and the evolution of research-ready technologies, we believe that space weather deserves a reexamination in terms of a “risk and resiliency” framework. By utilizing open data science, cross-disciplinary collaborations, information systems, and citizen science, we can forge stronger partnerships between science and industry and improve our readiness as a society to mitigate space weather impacts. The objective of this manuscript is to raise awareness of these concepts as we approach a solar maximum that coincides with an increasingly technology-dependent society, and introduce a unique way of approaching space weather through the lens of a risk and resiliency framework that can be used to further assess areas of improvement in the field.

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“…The design problem consists of choosing the coefficients of the controller k i so as to provide the required spectrum {λ ABC } of the matrix (A − BK) of the closed-loop system (14). The fourth order Butterworth polynomial:…”

Section: Control Law Designmentioning

confidence: 99%

“…[1][2][3]). Various control algorithms using differential aerodynamic drag have been proposed in numerous publications, see [4][5][6][7][8][9][10][11][12][13][14][15][16]. One of the fundamental publications is the work by Leonard [17] where, based on the assumption of the possibility of changing the effective cross-section of satellites, a method of switching control has been developed.…”

Section: Introductionmentioning

confidence: 99%

Control of Two Satellites Relative Motion over the Packet Erasure Communication Channel with Limited Transmission Rate Based on Adaptive Coder

2020

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The paper deals with the navigation data exchange between two satellites moving in a swarm. It is focused on the reduction of the inter-satellite demanded communication channel capacity taking into account the dynamics of the satellites relative motion and possible erasures in the channel navigation data. The feedback control law is designed ensuring the regulation of the relative satellites motion. The adaptive binary coding/decoding procedure for the satellites navigation data transmission over the limited capacity communication channel is proposed and studied for the cases of ideal and erasure channels. Results of the numerical study of the closed-loop system performance and accuracy of the data transmission algorithm on the communication channel bitrate and erasure probability are obtained by extensive simulations. It is shown that both data transmission error and regulation time depend approximately inversely proportionally on the communication rate. In addition the erasure of data in the channel with probability up to 0.3 does not influence the regulation time for sufficiently high data transmission rate.

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Ionospheric Drag for Satellite Formation Control

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Cited by 10 publications

References 30 publications

Friction in a strongly magnetized neutral plasma

Friction in a strongly magnetized neutral plasma

How open data and interdisciplinary collaboration improve our understanding of space weather: A risk and resiliency perspective

Control of Two Satellites Relative Motion over the Packet Erasure Communication Channel with Limited Transmission Rate Based on Adaptive Coder

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