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首页> 外文会议>Calibration of Passive Remote Observing Optical and Microwave Instrumentation >Evaluation of the NOAA-11 solar backscatter ultraviolet radiometer Mod 2 (SBUV/2): inflight calibration
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Evaluation of the NOAA-11 solar backscatter ultraviolet radiometer Mod 2 (SBUV/2): inflight calibration

机译：评估NOAA-11太阳反向散射紫外辐射计Mod 2（SBUV / 2）：飞行中校准

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Abstract: The second SBUV/2 was successfully launched on the polar orbiting NOAA-11 spacecraft as a continuation of the NIMBUS family of backscatter ultraviolet monochromators used to measure long-term ozone trends. The SBUV/2 is capable of measuring both total and vertical profile ozone concentrations with a long-term accuracy goal of one percent. In order to insure this accuracy and reliability, an extensive inflight calibration system was designed as part of the instrument. The calibration system's primary goal is to characterize the time and wavelength dependent degradation of the ground aluminum diffuser plate used to reflect solar radiation into the instrument's field-of-view. The NOAA-11 calibration system is a redesign of a similar system incorporated into the NOAA-9 SBUV/2, which did not perform to an acceptable level. This paper presents an analysis both of the NOAA-11 calibration system performance and of the changes of the solar diffuser reflectivity as measured by this system. In particular, after two years of inflight operation, the NOAA-11 system's performance is either on par or exceeding preflight expectations with none of the NOAA-9 problems evident. The solar diffuser displays a wavelength-dependent degradation of about 0.5% per year at 404 nm to about 2% at 185 nm which is consistent with previous diffuser reflectivity changes observed on NIMBUS-7 and NOAA-9.!
机译：摘要：作为NIMBUS系列反向散射紫外单色仪（用于测量长期臭氧趋势）的延续，第二架SBUV / 2已成功在极地轨道NOAA-11航天器上发射。 SBUV / 2能够测量总臭氧浓度和垂直臭氧浓度，并且长期精度目标为百分之一。为了确保这种准确性和可靠性，仪器设计了广泛的机内校准系统。校准系统的主要目标是表征用于将太阳辐射反射到仪器视场中的铝扩散板的时间和波长依赖性。 NOAA-11校准系统是结合到NOAA-9 SBUV / 2中的类似系统的重新设计，该系统的性能未达到可接受的水平。本文介绍了NOAA-11校准系统的性能以及该系统测得的太阳漫射器反射率变化的分析。尤其是，经过两年的机上运行，​​NOAA-11系统的性能达到了同等水平，甚至超出了飞行前的预期，而NOAA-9的问题都没有。太阳漫射器在404 nm处每年约有0.5％的波长衰减，到185 nm处约2％的波长变化，这与以前在NIMBUS-7和NOAA-9上观察到的漫射器反射率变化一致。

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