We analyze a nighttime negative cloud‐to‐ground lightning flash in Colombia observed from the ground with a high‐speed camera at 5,000 images per second and from space by the Atmosphere‐Space Interactions Monitor (ASIM) on the International Space Station (ISS), the Lightning Imaging Sensor also on the ISS (ISS‐LIS), and the Geostationary Lightning Mapper (GLM) on GOES‐16. The space instruments measure the oxygen band at 777.4 nm, allowing for direct comparisons of measurements, and the ground‐based camera observes in a wide visible band. After conversion to energy emitted at the cloud top, we find a good linear correspondence of the optical energies measured by the three space instruments, except that GLM values were 3 times higher. We attribute this mainly to the difference in viewing angles between spacecraft and the cloud. Over the entirety of the ASIM observed flash, optical pulses were detected by GLM and LIS, only when the energy reported by ASIM was greater than 332 J and 949 J, respectively. Their detection rate corresponds to 14% and 2.5%, respectively, of the flash duration observed by ASIM. The temporal variation of the high‐speed camera luminosity matched well the features observed by ASIM around the time of the stroke but reached ~3.9 times higher peak intensity during the return stroke, attributed to its broader spectral sensitivity band and a viewing angle advantage.

中文翻译：

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来自太空和地面的闪电的高速光学观测比较

我们使用高速摄影机以每秒5,000张图像的速度从地面上观察到了哥伦比亚的夜间夜间阴云对地闪电，并通过国际空间站（ISS）的大气-空间相互作用监测器（ASIM）从太空观察到了，同样位于国际空间站（ISS-LIS）上的闪电成像传感器和位于GOES-16上的对地静止闪电测绘仪（GLM）。太空仪器测量777.4 nm处的氧气带，可以直接比较测量值，而地面相机则在宽可见带中观察。转换为云顶发射的能量后，我们发现由三个空间仪器测得的光能具有良好的线性对应关系，只是GLM值高了3倍。我们将此归因于航天器和云之间的视角差异。在整个ASIM观测到的闪光中，只有当ASIM报告的能量分别大于332 J和949 J时，GLM和LIS才检测到光脉冲。它们的检测率分别相当于ASIM观测到的闪光持续时间的14％和2.5％。高速相机发光度的时间变化与ASIM观察到的冲程特征非常吻合，但由于其更宽的光谱灵敏度带和视角优势，在回程期间达到了约3.9倍的峰值强度。