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Principal Components Analysis of a JWST NIRSpec Detector Subsystem.

机译：JWsT NIRspec检测器子系统的主成分分析。

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We present principal component analysis (PCA) of a flight-representative James Webb Space Telescope NearInfrared Spectrograph (NIRSpec) Detector Subsystem. Although our results are specific to NIRSpec and its T - 40 K SIDECAR ASICs and 5 m cutoff H2RG detector arrays, the underlying technical approach is more general. We describe how we measured the systems response to small environmental perturbations by modulating a set of bias voltages and temperature. We used this information to compute the systems principal noise components. Together with information from the astronomical scene, we show how the zeroth principal component can be used to calibrate out the effects of small thermal and electrical instabilities to produce cosmetically cleaner images with significantly less correlated noise. Alternatively, if one were designing a new instrument, one could use a similar PCA approach to inform a set of environmental requirements (temperature stability, electrical stability, etc.) that enabled the planned instrument to meet performance requirements

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Arendt, R. G.; Fixsen, D. J.; Wilson, D. V.; Xenophontos, C.; Greenhouse, M. A.; Lander, M.; Lindler, D.; Loose, M.; Moseley, S. H.; Mott, D. B.; Rauscher, B. J.; Wen, Y.;
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年度 2013
页码 1-8
总页数 8
原文格式 PDF
正文语种 eng
中图分类工业技术;
关键词
Principal components analysis; James webb space telescope; Spectrographs; Near infrared radiation; Calibrating; Detection; Modulation; Thermal instability; Bias; Cryogenics;

机译：主成分分析;詹姆斯韦伯空间望远镜;光谱仪;近红外辐射;校准;检测;调制;热不稳定性;偏差;低温学;

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Principal Components Analysis of a JWST NIRSpec Detector Subsystem.

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