attitude–orbit coupling
High-fidelity Approximate Analysis of SRP
We formulate the solar radiation pressure (SRP) using a high-fidelity reflection model that is commonly used in computer graphics. As the analytical solution cannot be obtained with complex reflection models, we use the methods used in the computer graphics field to derive an approximate analytical solution. This makes it possible to analyze the stability of orbits and attitudes using high-fidelity SRP and design control laws.
keywords: solar radiation pressure, BRDF
refs.
- Yoshimura, Y., Matsushita, Y., Takahashi, K., Nagasaki, S., and Hanada, T., Analytic Approximation of High-Fidelity Solar Radiation Pressure, Journal of Guidance, Control, and Dynamics, in press.
Formulation of Light Curve and SRP
Solar radiation pressure (SRP) and light curves are phenomena caused by the reflection of sunlight and are essentially the same. They can be directly related to each other because they depend on the attitude, shape, and surface optical characteristics of spacecraft. This aims to improve the accuracy of state estimation using light curves.
keywords: light curve, solar radiation pressure, BRDF
refs.
- Yoshimura, Y., Matsushita, Y., Arakawa, R., and Hanada, T., Light Curve Approximation Using an Attitude Model of Solar Sail Spacecraft, Journal of Guidance, Control, and Dynamics, Vol. 43, No. 10, October 2020, pp. 1960–1966, doi: 10.2514/1.G004966.