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Aqua MODIS Electronic Crosstalk Survey from Moon Observations

机译：来自月球观测的Aqua MODIS电子串扰调查

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Signatures of electronic crosstalk contamination are clearly seen in Aqua MODIS Moon images from bands 20 to 30 (1.375 and 3.75 - 9.73 μm). Electronic crosstalk can potentially impact L1B products, causing image artifacts such as striping and radiometric bias, the severity of which will depend on the amount of signal leaked, how it compares to the flux levels in the receiving image, and on the ability of the calibration in absorbing the contamination. In this paper, we address two distinct manifestations of electronic crosstalk contamination seen in Aqua MODIS lunar images that we call the simple and complex ghosts. The simple ghosts appear in lunar images from bands 20 to 30, affect detector 1 only, and each ghost is caused by signal leak from one sending detector only. The complex ghosts form negative regions in Aqua MODIS lunar images from bands 27 to 30 and are caused by multiple sending detectors and bands. We map the crosstalk signatures back to their respective sending bands/detectors, by determining the displacement between the main lunar image and the crosstalk ghosts. We assume the contaminating signal is proportional to the signal of the sending band/detector and derive linear crosstalk coefficients for the simple ghosts in bands 20 to 26 and 28 to 30 and for the complex ghosts in band 29 for the entire mission. The linear crosstalk coefficients can then be applied in the correction of L1A Earth and calibration data that will generate corrected L1B images from which we can assess the impact the contamination has on the L1B product.
机译：在20至30波段（1.375和3.75-9.73μm）的Aqua MODIS Moon影像中清晰可见电子串扰污染的特征。电子串扰可能会影响L1B产品，导致图像伪影，例如条纹和辐射偏斜，其严重程度将取决于泄漏的信号量，与接收图像中的通量水平进行比较的方式以及校准的能力。吸收污染物。在本文中，我们解决了在Aqua MODIS月球图像中看到的两个电子串扰污染的不同表现形式，我们将其称为简单和复杂的鬼影。简单的幻影出现在20至30波段的月球图像中，仅影响探测器1，每个幻影仅由一个发送探测器发出的信号泄漏引起。复杂的鬼影在Aqua MODIS月球图像中从波段27到30形成负区，并且是由多个发送探测器和波段引起的。通过确定主月球图像和串扰重影之间的位移，我们将串扰签名映射回它们各自的发送频段/检测器。我们假设污染信号与发送频带/检测器的信号成比例，并为整个任务推导了频带20至26和28至30中简单鬼影和频带29中复杂鬼影的线性串扰系数。然后，可以将线性串扰系数应用于L1A地球和校正数据的校正中，这些校正数据将生成校正后的L1B图像，从中我们可以评估污染对L1B产品的影响。

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