Evaluation of thermal analysis of orbital environment of microsatellite ALE-1

Mina Konaka, Shinya Fujita, Yuji Sato, Tomomasa Shibuya, Tohsinori Kuwahara, Koh Kamachi

Research output: Contribution to journalConference articlepeer-review

1 Citation (Scopus)


The mission of the ALE-1 satellite is to release particles from the satellite, and then to observe the artificial shooting stars from a specific point on the ground by re-entering the meteor source at a target point. In this paper, we propose a thermal design for the ALE-1 satellite, and we show evaluation results that are verified by a Thermal Desktop/SINDA/Fluint. ALE-1 is scheduled for launch from Japan in December 2018 on the Epsilon rocket. Given the surface area and power limitations, passive thermal control is deemed necessary to guarantee a successful mission under extreme environments resulting from the varying orbit beta angles. Based on the worst-case scenario, such as the Hot case and Cold case, we determine that onboard avionics are within temperature tolerance levels. The trajectory of the satellite while maintaining the direction in which the sunlight is most widely received by the satellite in which the effective cross section area with respect to the sunlight was the largest is called the Hot case. Moreover, the trajectory in which only the cover surface of the MLI continues to receive sunlight is called the Cold case. The ALE-1 satellite is with components which are critical for low temperature. The simulation results of ALE-1 satellite found that the temperature can be passively controlled to the desired range by optimizing the thermal resistance of connecting parts, the thermal optical characteristics of the satellite surface, and the double structure configuration of the satellite. We perform thermal simulations of the ALE-1 satellite to modify its performance within the tolerant temperature range.

Original languageEnglish
JournalProceedings of the International Astronautical Congress, IAC
Publication statusPublished - 2018
Event69th International Astronautical Congress: #InvolvingEveryone, IAC 2018 - Bremen, Germany
Duration: 2018 Oct 12018 Oct 5


  • Microsatellite
  • Thermal system design

ASJC Scopus subject areas

  • Aerospace Engineering
  • Astronomy and Astrophysics
  • Space and Planetary Science


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