Abstract. The cloud particle concentration, size and shape data from optical array probes (OAPs) are routinely used to parameterise cloud properties and constrain remote sensing retrievals. This paper characterises the optical response of OAPs using a combination of modelling, laboratory and field experiments. Significant uncertainties are found to exist with such probes for ice crystal measurements. We describe and test two independent methods to constrain a probe's sample volume that removes the most severely mis-sized particles: (1) greyscale image analysis and (2) co-location using stereoscopic imaging. These methods are tested using field measurements from three research flights in cirrus. For these cases, the new methodologies significantly improve agreement with a holographic imaging probe compared to conventional data processing protocols, either removing or significantly reducing the concentration of small ice crystals (

中文翻译：

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表征光学阵列粒子成像探头：对小型冰晶观测的影响

摘要。来自光学阵列探测器（OAP）的云颗粒浓度，大小和形状数据通常用于参数化云特性并限制遥感检索。本文通过结合建模，实验室和现场实验来表征OAP的光学响应。已经发现，这种用于冰晶测量的探头存在很大的不确定性。我们描述并测试了两种独立的方法来约束探针的样本量，该样本量可消除尺寸最严重的错误颗粒：（1）灰度图像分析和（2）使用立体成像进行共址。这些方法使用来自卷云的三个研究飞行的野外测量进行了测试。对于这些情况，与传统的数据处理协议相比，新方法大大改善了与全息成像探头的一致性，