Abstract
In the post-IKAROS/JAXA scenario of space sailing, the main aim of this chapter is to show that one could utilize the radiant energy from the Sun as a very special external-to-spacecraft source of thrust. The chapter begins with a summary of radiometric quantities, and then points out the immense contribution of space-era to the solar physics, especially through the high-precision records of the total and spectral solar irradiances. The time series of such quantities will be important in designing fast solar-sail trajectories. In particular, are highlighted the several principles for realizing a highly versatile in-space propulsion through the utilization of some properties of the solar irradiance. The time fluctuations of the total solar irradiance are emphasized; their influence on sailcraft trajectories will be analyzed in the last chapter of the book.
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Notes
- 1.
In the language of geometric algebra, dA is a bivector.
- 2.
In the framework of this book, such assumption is always satisfied.
- 3.
This one should not be confused with the coefficients related to particle diffusion in gas or plasma.
- 4.
This is the radiant power emitted by a star.
- 5.
In this and subsequent chapters, we use the custom term “magnetic field” for actually indicating the magnetic induction field or magnetic flux density, which is denoted by B and measured in Tesla, or Wb/m2, in the SI.
- 6.
The French name standing for beach, because a plage resembles light-colored “sand” against the darker background.
- 7.
TSI represents the actual energy rate at the top of the Earth’s atmosphere. Even SSI is notably important because, among various things, its large fluctuations in the UV band cause variations in the physical/chemical properties of the upper atmosphere.
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Vulpetti, G. (2013). The Sun as Power Source for Spaceflight. In: Fast Solar Sailing. Space Technology Library, vol 30. Springer, Dordrecht. https://doi.org/10.1007/978-94-007-4777-7_2
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