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首页> 外文期刊>Atmospheric Measurement Techniques >Comparing lightning observations of the ground-based European lightning location system EUCLID and the space-based Lightning Imaging Sensor (LIS) on the International Space Station (ISS)
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Comparing lightning observations of the ground-based European lightning location system EUCLID and the space-based Lightning Imaging Sensor (LIS) on the International Space Station (ISS)

机译：比较地面欧洲雷电定位系统EUCLID的闪电观测和国际空间站（ISS）的空间雷电成像传感器（LIS）

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摘要

The Lightning Imaging Sensor (LIS) on the International Space Station (ISS), hereafter referred to as ISS-LIS, detects lightning from space by capturing the optical scattered light emitted from the top of the clouds. The groundbased European Cooperation for Lightning Detection (EUCLID) makes use of the low-frequency electromagnetic signals generated by lightning discharges to locate them accordingly. The objective of this work is to quantify the similarities and contrasts between these two distinct lightning detection technologies by comparing the EUCLID cloud-to-ground strokes and intracloud pulses to the ISS-LIS groups in addition to the correlation at the flash level. The analysis is based on the observations made between 1 March 2017 and 31 March 2019 within the EUCLID network and limited to 54 degrees north. A Bayesian approach is adopted to determine the relative and absolute detection efficiencies (DEs) of each system. It is found that the EUCLID relative and absolute flash DE improves by approximately 10% towards the center of the EUCLID network up to a value of 56.3% and 69.0 %, respectively, compared to the averaged value over the full domain, inherent to the network geometry and sensor technology. In contrast, the relative and absolute ISS-LIS flash DE over the full domain is 48.4% and 71.3 %, respectively, and is somewhat higher than the values obtained in the center of the EUCLID network. The behavior of the relative DE of each system in terms of the flash characteristics of the other reveals that the greater the value, the more likely the other system will detect the flash. For instance, when the ISS-LIS flash duration is smaller than or equal to 200 ms, the EUCLID relative flash DE drops below 50 %, whereas it increases up to 80% for ISS-LIS flashes with a duration longer than 750 ms. Finally, the distribution of the diurnal DE indicates a higher DE for the ISS-LIS and a lower DE for EUCLID at night.
机译：在国际空间站（ISS）上的闪电成像传感器（LIS），下文称为ISS-LIS，通过捕获从云顶部发出的光散射光来检测来自空间的闪电。用于避雷检测（EUCLID）的地面欧洲合作利用雷电排放产生的低频电磁信号，以相应地定位它们。除了在闪光灯水平的相关性之外，通过将EucRID云到地带和脑内脉冲与IS-LIS组进行比较来量化这两个不同闪电检测技术之间的相似性和对比。该分析基于2017年3月1日至2019年3月31日在欧几里德网络之间进行的观察，并限于54度北方。采用贝叶斯方法来确定每个系统的相对和绝对检测效率（DES）。结果发现，与网络上固有的平均值相比，EuclID相对和绝对闪光朝向EucRID网络中心的中心分别朝向EuclID网络的中心提高了大约56.3％和69.0％的值。几何和传感器技术。相反，整个领域的相对和绝对ISS-LIS闪光段分别为48.4％和71.3％，并且略高于欧核网络中心所获得的值。每个系统的相对de在另一个系统的相对de表明，该值越大，其他系统将更有可能检测到闪光灯。例如，当ISS-LIS闪存持续时间小于或等于200ms时，EUCLID相对闪存DE降至低于50％，而IS-LIS闪烁的闪烁增加高达80％的时间增加到750毫秒。最后，昼夜DE的分布表明了ISS-LIS的更高DE，晚上为EUCLID的下部。

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