Operational performance of the TIMED Doppler Interferometer (TIDI)
Operational performance of the TIMED Doppler Interferometer (TIDI)
复制标题
定时多普勒干涉仪 (TIDI) 的操作性能
DOI：
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发表时间：
2003
期刊：
影响因子：
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通讯作者：
J. Kafkalidis
中科院分区：
文献类型：
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作者：
W. Skinner;R. Niciejewski;T. Killeen;S. Solomon;D. Gablehouse;Qian Wu;D. Ortland;D. Gell;A. Marshall;Edwin R. Wolfe;M. Cooper;J. Kafkalidis
TIMED多普勒干涉仪是一种法布里-珀罗干涉仪，设计用于测量中间层和热层（60-180公里）的风，作为TIMED使命的一部分。TIDI是一个临边观测器，观测来自OI 557.7 nm的发射和O2（0-0）大气波段的旋转线。风的测量精度在中间层接近3 ms-1，在热层接近15 ms-1。本文讨论了TIDI仪器运行一年半以来的性能。许多子系统按设计工作。热控制系统将仪器温度保持在其所需的设定点。CCD检测器按预期工作，未观察到增益、偏置或读取噪声发生变化。该仪器存在光泄漏，导致背景升高，增加了风测量的不确定性。没有什么可以做，以消除这个问题，但建模的背景已经消除了任何系统的影响。从航天器或仪器中排出的水在光学器件的某些部分上沉积成冰，降低了仪器的灵敏度。这个问题已经减少了两个航天器滚动指出，TIDI辐射器，以查看更多的地球，使光学温暖和升华大部分的冰。
The TIMED Doppler Interferometer (TIDI) is a Fabry-Perot interferometer designed to measure winds in the mesosphere and thermosphere (60-180 km) as part of the TIMED mission. TIDI is a limb viewer and observes emissions from OI 557.7 nm and rotational lines in the O2(0-0) Atmospheric band. Wind measurement accuracies approach 3 ms-1 in the mesosphere and 15 ms-1 in the thermosphere. The TIDI instrument’s performance during the first year and a half of operation is discussed in this paper. Many subsystems are working as designed. The thermal control system is holding the instrument temperatures at their desired set-points. The CCD detector is working as expected with no changes observed in the gain, bias or read noise. The instrument suffers from a light leak that causes the background to be elevated and increases the uncertainty in the wind measurement. Nothing can be done to eliminate this problem but modeling of the background has eliminated any systematic effect. Water outgassing from the spacecraft or instrument has deposited as ice on some part of the optics and reduced the instrument’s sensitivity. This problem has been reduced by two spacecraft rolls which pointed the TIDI radiator to view more of the earth causing the optics to warm up and sublimate much of the ice.