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Updated: Jun 24, 2026

06:56
Micro/Nano-scale Strain Distribution Measurement from Sampling Moiré Fringes
Published on: May 23, 2017
まとめ
新しい望遠鏡を用いて,8〜14マイクロメートルの窓における大気の衰弱を測定した. 雲の覆いでは,34%以上で30デシベルを超える信号損失が発生することが多い.
科学分野:
- 大気物理学 大気物理学
- 光学工学は,光学工学である.
- リモートセンシングによる遠隔感知
背景:
- 大気窓は,赤外線 (IR) 伝送に不可欠です.
- 信号衰弱の理解は,光通信および遠隔感知システムにとって不可欠です.
- この特定の大気窓の以前の測定は限られている.
研究 の 目的:
- 8~14マイクロメートルの波長範囲における大気の衰弱を定量化するために.
- 天気,特に雲が信号伝送に与える影響を評価する.
- 堅牢な光学システムの設計のためのデータを提供するために.
主な方法:
- クロフォードヒルの太陽追跡装置には望遠鏡が組み込まれていた.
- 測定は9ヶ月間にわたって行われました.
- 衰弱は8〜14マイクロメートルの大気窓内でデシベル (dB) で測定されました.
主要な成果:
- 大気の大幅な衰弱が頻繁に観察されました.
- 10dBを超える衰弱は48%で発生しました.
- 20dBと30dBを超える衰弱は,それぞれ43%と34%で発生し,主に雲によるものです.
結論:
- 雲の覆いは,8〜14マイクロメートルの大気窓で,かなりの信号損失を引き起こします.
- 測定された衰弱レベルは,この帯域で動作する光学システムの課題を強調しています.
- 大気干渉の緩和戦略を開発するためにさらなる研究が必要である.
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