Degradation Analyses Defining of The Test Parameters In Orbit To Optical Solar Reflector for Space Use

  • Marcos Galante Boato
  • Ezio Castejon Garcia Instituto Tecnológico de Aeronáutica- ITA
  • Francisco Carlos Cione
  • Mauro Machado de Oliveira


Abstract –Optical Solar Reflector (OSR) is a thermal control material utilized in the majority of the satellite to world and also was developed in Brazil as an alternative to be used in the special program. OSR is a passive radiator, applying it as a coating on the outside walls in order to reject the heat generated internally to the satellite to the space environment. This type of radiator has a low absorptivity in the solar spectrum (αs) and a high emissivity in the infrared spectrum (εIR). However, the degradation caused by the space environment increases the demanding and consequently reduces the efficiency of the radiator. We are designing an experiment to test in orbit one OSR developed at the National Institute for Space Research aimed, among other objectives, to evaluate their degradation when exposed to the space environment. The experiment should be exposed to solar radiation and having its monitored temperature and, based on this, determining the variation of the αs as the increase of the OSR’ degradation over time. An analysis using the mathematical program SINDA/FLUINT was made in order to determine the relationship of increased temperature radiator with increasing the αs. This article presents the results of this exploratory analysis and the experiment viability conditions.

Biografia do Autor

Ezio Castejon Garcia, Instituto Tecnológico de Aeronáutica- ITA

Ezio Castejon Garcia; Graduate at Mechanical Engineering from Universidade Federal de Uberlândia (1983), master's at Aerospace Engineering from Instituto Tecnológico de Aeronáutica (1987) and ph.d. at Aerospace Engineering from Instituto Tecnológico de Aeronáutica (1996). Has experience in Aerospace Engineering,acting on the following subjects: space simulation, spacecrafts simulation, satellite, thermal-vacuum test and brazilian satellites.

Francisco Carlos Cione

Francisco Carlos Cione, graduated in Engineering at College of Engineering São
Paulo, in electronics and telecommunications modality (2001), Specialization in Computer Science for Systems and Networks at Federal University of São Carlos - UFSCar (2005), Graduation in Physics by the University of São Paulo (2010) Master in Nuclear Technology - Materials by Institute of Energy and Nuclear Research - IPEN (2011), Ph.D. in Nuclear Technology - Materials at Nuclear and Energy Research Institute (02/2018). Experienced in Powder Metallurgy (PM), Processes and dynamic testing. Getting emphasis on hardware and software for data acquisition, conditioning, processing and analyzing for experimental testing in materials characterization. At INPE (National Institute of Space Research) acts at researcher for embedded systems as a System Engineer developing applications for attitude control of satellites-2019.