3 October 2011 On orbit performance of radio spectrometers of Superconducting Submillimeter-Wave Limb-Emission Sounder (JEM/SMILES)
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Abstract
On-orbit performance of the radio spectrometer of SMILES is discussed. We focused on the telemetry data of photodiode current, laser diode current, and laser diode operating temperature. The data showed degradation trend as the mission went on. This is due to a wear-out phenomenon of commercially available laser diode, which is used as the light source of the radio spectrometer. Since the laser diodes have a certain lifetime, both screening procedure and operating condition for them must be properly defined and implemented for ensuring a good performance of the spectrometer throughout designed mission life. For these purposes, we conducted several kinds of qualification tests including an accelerated life time test during design phase, and expected life time of the laser diode was derived on the basis of these test results. In this paper, the results from the qualification tests at ground and the actual performance on orbit with the telemetry and mission data will be presented.
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Hiroyuki Ozeki, Hiroyuki Ozeki, Satoko Mizobuchi, Satoko Mizobuchi, Kenta Tamaki, Kenta Tamaki, Ken-ichi Kikuchi, Ken-ichi Kikuchi, Toshiyuki Nishibori, Toshiyuki Nishibori, Satoshi Ochiai, Satoshi Ochiai, Masato Shiotani, Masato Shiotani, Chihiro Mitsuda, Chihiro Mitsuda, "On orbit performance of radio spectrometers of Superconducting Submillimeter-Wave Limb-Emission Sounder (JEM/SMILES)", Proc. SPIE 8176, Sensors, Systems, and Next-Generation Satellites XV, 81760K (3 October 2011); doi: 10.1117/12.898018; https://doi.org/10.1117/12.898018
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