pole-sitter orbits
Design of optimal transfers between North and South Pole-sitter orbits
... minimized. For both propulsion strategies the optimal control problem is defined and solved using a direct optimization method based on pseudospectral transcription. Initial guesses are generated using an inverse method ...
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A near term pole-sitter using hybrid solar sail propulsion
... optimal pole-sitter orbits using hybrid solar sail and solar electric propulsion ...A pole-sitter is a spacecraft that is constantly above one of the Earth’s ...Optimal orbits, ...
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An earth pole-sitter using hybrid propulsion
... optimal pole-sitter orbits using hybrid solar sail and solar electric propulsion ...A pole-sitter is a spacecraft that is constantly above one of the Earth’s poles, by means of a ...
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Mission analysis and systems design of a near-term and far-term pole-sitter mission
... the pole-sitter spacecraft to change between pole-sitter orbits above the North and South Poles before the start of the Arctic and Antarctic winters, see Figure ...hybrid ...
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Novel pole-sitter mission concepts for continuous polar remote sensing
... the pole-sitter spacecraft to change between pole-sitter orbits above the North and South Poles before the start of the Arctic and Antarctic winters, see Figure ...hybrid ...
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Design of optimal Earth pole-sitter transfers using low thrust propulsion
... a pole-sitter position has been ...AU) pole-sitter ...the pole-sitter orbit, has been modelled in the circular restricted three body problem and both ballistic and low-thrust SEP ...
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Design of optimal Earth pole-sitter transfers using low-thrust propulsion
... the pole-sitter mission was first proposed by Driver [2] and later by Forward [10], but an extensive investigation of optimal pole-sitter orbits and their control has only recently been ...
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Systems design of a hybrid sail pole-sitter
... periodic pole-sitter orbits that minimize the SEP propellant consumption over a period (one year), while maintaining the pole-sitter condition (5) at each instant during the ...Optimal ...
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Mission analysis and systems design of a near-term and far-term pole-sitter mission
... far-term pole- sitter mission. The pole-sitter concept was previously introduced as a solution to the poor temporal resolution of polar observations from highly inclined, low Earth ...
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Novel solar sail mission concepts for high-latitude earth and lunar observation
... inclination orbits such as the ICESat-1 (NASA, 2003 – 2010) and Cryosat-2 (ESA, 2010 – ongoing) ...polar orbits restricts spacecraft to observe only narrow swaths of the polar regions throughout each ...
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Design and trade-offs of a pole-sitter mission
... hybrid-propulsion pole-sitter: from the generation of optimal hybrid pole-sitter orbits [10], to system mass budgets [20], and from design of optimal transfers to the ...
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Trajectory and spacecraft design for a pole-sitter mission
... a pole-sitter ...South Pole and, as such, can provide real-time, continuous and hemispherical coverage of the polar ...near-term pole-sitter mission using solar electric propulsion and ...
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Gravity and Orbits
... Students will examine and judge scientific evidence and explanations using logical reasoning, experimental and observational testing... Students switch [r] ...
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AN ANALYTICAL AND NUMERICAL TREATMENT OF INCLINED ELLIPTICAL ORBITS ABOUT A KERR BLACK HOLE
... LSO orbits with respect to KBH spin are available in the literature (table I in [2], based upon the work of Schmidt [25], and table I in [10]); and they will provide a means to validate our ...
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Selection of an orbit for communication satellite based on inclination and eccentricity
... After studying the importance of inclination and eccentricity in satellite communication orbits, we choose to study the orbits under their classifications, and explored various satellite orbit types. Under ...
5
Generalization of the de Sitter Cosmos
... First of all, we investigate whether the transformation of Lemaître inevitably leads from the static de Sitter cosmos to an expanding cosmos. A Lorentz transformation which can be assigned to the Lemaître ...
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Weighted kneading theory of one dimensional maps with a hole
... periodic orbits, or to the orbits that lie in the hole is also valid for aperiodic ...periodic orbits, or the orbits that lie in the ...
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esd08.pdf
... this pole (or conjugate pair of poles, most likely) to higher frequency, but not above half-wavelength for the longer ...frequency pole resonance can be destructive because the termination current ...
10
Orbits and Interiors of Planets
... It is noteworthy that evolving the giant planets onto solar system-like orbits is insuffi- cient for a simulation to be deemed successful for indeed, there are additional constraints that must be satisfied. The ...
330
Tensor networks and geometry for the modelling of disordered quantum many body systems
... Abbreviations AdS - Anti-de Sitter space AdS/CFT - Anti-de Sitter/conformal field theory correspondence AFM - Antiferromagnetic APBC - Anti-periodic boundary condition CFT - Conformal fi[r] ...
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