略語大辞典 [Opt] 27 NOGS naturally occurring guide star 自然基準星. 望遠鏡の補正で基準として使う実際の星.naturally occurring guide star; a guidestar that an AOS(adaptive-optics system) WDS(wave-front-distortion sensor) in a telescope requires for measurement of the turbulence-inducedwave-front distortion; ref. AGS(artificialguid 丸善「略語大辞典」JLogosID : 11863118