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Proceedings Paper

Philosophy and key features of 'Hodoyoshi' concept for optical remote sensing using 50kg class satellites
Author(s): A. Enokuchi; N. Takeyama; Y. Nakamura; Y. Nojiri; N. Miyamura; A. Iwasaki; S. Nakasuka
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Paper Abstract

Remote sensing missions have been conventionally performed by using satellite-onboard optical sensors with extraordinarily high reliability, on huge satellites. On the other hand, small satellites for remote-sensing missions have recently been developed intensely and operated all over the world. This paper gives a Japanese concept of the development of nano-satellites(10kg to 50kg) based on "Hodoyoshi" (Japanese word for "reasonable") reliability engineering aiming at cost-effective design of optical sensors, buses and satellites. The concept is named as "Hodoyoshi" concept. We focus on the philosophy and the key features of the concept. These are conveniently applicable to the development of optical sensors on nano-satellites. As major advantages, the optical sensors based on the "Hodoyoshi" concept are "flexible" in terms of selectability of wavelength bands, adaptability to the required ground sample distance, and optimal performance under a wide range of environmental temperatures. The first and second features mentioned above can be realized by dividing the functions of the optical sensor into modularized functional groups reasonably. The third feature becomes possible by adopting the athermal and apochromatic optics design. By utilizing these features, the development of the optical sensors become possible without exact information on the launcher or the orbit. Furthermore, this philosophy leads to truly quick delivery of nano-satellites for remote-sensing missions. On the basis of the concept, we are now developing nano-satellite technologies and five nano-satellites to realize the concept in a four-year-long governmentally funded project. In this paper, the specification of the optical sensor on the first satellite is also reported.

Paper Details

Date Published: 28 October 2010
PDF: 9 pages
Proc. SPIE 7862, Earth Observing Missions and Sensors: Development, Implementation, and Characterization, 78620B (28 October 2010); doi: 10.1117/12.869499
Show Author Affiliations
A. Enokuchi, Genesia Corp. (Japan)
N. Takeyama, Genesia Corp. (Japan)
Y. Nakamura, AXELSPACE Corp. (Japan)
Y. Nojiri, Next-generation Space Systems Technology Research Association (Japan)
N. Miyamura, The Univ. of Tokyo (Japan)
A. Iwasaki, The Univ. of Tokyo (Japan)
S. Nakasuka, The Univ. of Tokyo (Japan)

Published in SPIE Proceedings Vol. 7862:
Earth Observing Missions and Sensors: Development, Implementation, and Characterization
Xiaoxiong Xiong; Choen Kim; Haruhisa Shimoda, Editor(s)

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