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Model estimation of the HIRDLS exit aperture fractional open area

机译：HIRDLS出口孔径小开口面积的模型估计

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The High Resolution Dynamics Limb Sounder (HIRDLS) instrument suffered a debilitating event during the Aura Satellite launch on July 15, 2004. After the initial instrument activation phase was completed 25 days later, the first atmospheric scan tests revealed a much different radiance field than was expected prior to launch. A subsequent lengthy investigation suggested that the HIRDLS exit aperture was mostly obstructed by sheathing material that lined the inner fore-optics cavity. As part of the radiance correction process workaround, it is necessary to provide radiances to the retrieval algorithm that are equivalently unobstructed (clear view); hence, knowledge on the amount of unobstructed exit-aperture area is needed. This manuscript describes the problem and the modeling method used to estimate the amount of unobstructed area of the HIRDLS exit aperture. Particular emphasis will be given to the type of data required to ascertain this quantity. Lastly, a diagnostic scheme for evaluating the calculated unobstructed open area for each channel will be discussed, along with a look to the future.
机译：在2004年7月15日发射Aura卫星期间，高分辨率动力学肢体发声器（HIRDLS）仪器发生了令人衰弱的事件。在25天后完成了初始仪器激活阶段后，首次大气扫描测试显示出与以前大不相同的辐射场。预计在发布之前。随后的冗长调查表明，HIRDLS出射孔大部分被衬在内部前视腔内的护套材料阻塞。作为辐射校正过程变通方法的一部分，有必要向检索算法提供等效地无障碍的辐射（清晰视图）；因此，需要有关通畅的出射孔面积的知识。该手稿描述了该问题以及用于估算HIRDLS出口孔径的无障碍面积的建模方法。将特别强调确定此数量所需的数据类型。最后，将讨论用于评估每个通道的计算出的通畅开口面积的诊断方案，以及对未来的展望。

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