The Journal of the Astronautical Sciences
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Analysis of Autonomous Orbit Determination in Various Near-Moon Periodic Orbits
The Journal of the Astronautical Sciences - Tập 70 - Trang 1-30 - 2023
A robust yet affordable autonomous orbit determination system must be in place as the traffic of spacecraft in cislunar space increases. The methods of autonomous orbit determination analyzed in this paper are the use of Global Navigation Satellite System signals and horizon-based optical navigation with the Moon. This paper details a simulation of cislunar space with various non-Keplerian orbits ...... hiện toàn bộ
Radially accelerated periodic orbits in the Clohessy-Wiltshire frame
The Journal of the Astronautical Sciences - Tập 56 Số 1 - Trang 1-16 - 2008
On Periodic Polar Orbits in the Artificial Satellite Problem
The Journal of the Astronautical Sciences - Tập 45 - Trang 321-328 - 2020
We compute periodic orbits in the Artificial Satellite Theory. We fix our attention on the Earth case where we considered a zonal gravitational model for the potential. In a rotating frame attached to the Earth we have found sixteen polar orbits that are periodic after different number of revolutions. The altitude of each orbit remains almost constant and varies from about 263 km for the sixteen-r...... hiện toàn bộ
Nonlinear Slewing Spacecraft Control Based on Exergy, Power Flow, and Static and Dynamic Stability
The Journal of the Astronautical Sciences - Tập 57 - Trang 717-741 - 2013
This paper presents a new nonlinear control methodology for slewing spacecraft, which provides both necessary and sufficient conditions for stability by identifying the stability boundaries, rigid body modes, and limit cycles. Conservative Hamiltonian system concepts, which are equivalent to static stability of airplanes, are used to find and deal with the static stability boundaries: rigid body m...... hiện toàn bộ
Integrated Targeting and Guidance for Powered Planetary Descent
The Journal of the Astronautical Sciences - - 2018
This paper presents an on-board guidance and targeting design that enables explicit state and thrust vector control and on-board targeting for planetary descent and landing. These capabilities are developed utilizing a new closed-form solution for the constant thrust arc of the braking phase of the powered descent trajectory. The key elements of proven targeting and guidance architectures, includi...... hiện toàn bộ
The Three-Body Interaction Effect on the Families of 3D Periodic Orbits Associated to Sitnikov Motion in the Circular Restricted Three-Body Problem
The Journal of the Astronautical Sciences - Tập 67 - Trang 28-58 - 2019
This paper deals with a modified version of the Circular Restricted Three-Body Problem (CR3BP). In this version, the additional effect of a three-body interaction is taken into account. In particular, we examine numerically the result of this interaction on the evolution of the well-known family of Sitnikov motion of CR3BP as well as that on the families of 3D periodic orbits bifurcating from this...... hiện toàn bộ
Detumbling a Flexible Tumbling Target Using a Space Robot in Post-capture Phase
The Journal of the Astronautical Sciences - Tập 69 - Trang 1048-1075 - 2022
In recent years, the sustained growth of space launch missions has inevitably led to a rapid increase in space debris, which has attracted extensive attention to the capture and removal of space debris. This paper presents a new strategy for detumbling a flexible tumbling target in the post-capture phase using a flexible-base space robot (also called a chaser), which involves trajectory optimizati...... hiện toàn bộ
Constraint in Attitude Estimation Part I: Constrained Estimation
The Journal of the Astronautical Sciences - Tập 51 - Trang 51-74 - 2020
A complete and careful foundation is presented for maximum-likelihood attitude estimation and the calculation of measurement sensitivity matrices with the intent of revealing heretofore undisclosed pitfalls associated with unconstrained quaternion estimation. Efficient formulas are developed for computing the measurement sensitivity matrix for any attitude representation for which an efficient for...... hiện toàn bộ
Semi-Empirical Astronomical Light Pollution Evaluation of Satellite Constellations
The Journal of the Astronautical Sciences - Tập 69 - Trang 1893-1928 - 2023
Several commercial organizations have recently launched or plan to launch constellations containing thousands of satellites. Such large constellations potentially adversely affect astronomical observations. This study formulates a set of indicators that assess the impact of light pollution from different constellations on ground-based visible band astronomy. These include the statistically expecte...... hiện toàn bộ
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