High-resolution Doppler imager: instrument performance from late 1991 to mid-1999
High-resolution Doppler imager: instrument performance from late 1991 to mid-1999
复制标题
高分辨率多普勒成像仪：1991 年末至 1999 年中期的仪器性能
DOI：
10.1117/12.366384
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发表时间：
1999
影响因子：
--
通讯作者：
D. Marsh
中科院分区：
文献类型：
--
作者：
W. Skinner;D. Gell;A. Marshall;P. Hays;J. Kafkalidis;D. Marsh
自1991年11月以来，高层大气研究卫星上的高分辨率多普勒成像仪一直在提供平流层、中间层和低热层风场的测量。中间层温度，臭氧和O（1D）的密度，平流层气溶胶折射系数，也被检索。在近八年的运行中，通过频繁的校准对仪器特性进行了仔细的监测。仪器的灵敏度显示出显着的下降（在某些情况下接近50%），在第一个七年半的操作，这是由压电控制的标准具慢慢地从平行状态漂移。在1998年后期对标准具进行了重新校准，使仪器的灵敏度几乎完全恢复。灵敏度的损失与时间呈线性关系，有时会发生离散变化。仔细的数据建模允许确定作为时间函数的灵敏度，允许针对该系统效应对数据进行校正。
The High Resolution Doppler Imager (HRDI) on the Upper Atmosphere Research Satellite has been providing measurements of the wind field in the stratosphere, mesosphere, and lower thermosphere since November 1991. Mesospheric temperatures, ozone and O(1D) densities, and stratospheric aerosol extinctions coefficients, are also retrieved. The instrument characteristics have been carefully monitored by frequent calibrations during the nearly eight years of operation. The instrument sensitivity showed a significant decrease (close to 50% in some cases) during the first seven and a half years of operation which was caused by the piezoelectric-controlled etalons slowly drifting from a parallel state. A recalibration of the etalons in late 1998 resulted in close to a complete recovery of the instrument sensitivity. The loss of sensitivity was linear with time, with discrete changes occurring at times. Careful modeling of the data permits a determination of the sensitivity as a function of time, allowing the data to be corrected for this systematic effect.