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Optical effects produced by running onboard engines of low-earth-orbit spacecraft

机译：低地球轨道航天器的机载发动机产生的光学效果

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This paper presents results of optical observations made during Radar-Progress Experiment performed on April 17, 2013 and July 30, 2014 after approach-correction engines (ACE) of Progress M-17M and Progress M-23M cargo spacecraft in the thermosphere had been started. A region of enhanced emission intensity was recorded during engine operation. This may have been related to the scatter of twilight solar emission along the cargo spacecraft exhaust and to the emergence of additional atomic oxygen [OI] emission at 630 nm. The maximum dimension of the observed emission region was ~330–350 km and ~250–270 km along and across the orbit respectively. For the first time after ACE had been started, an expansion rate of emission region was ~ 7 and ~ 3.5 km/s along and across the orbit respectively. The maximum intensity of the disturbance area for Progress M-17M is estimated as ~40–60 R at 2 nm. Pro-gress M-23M Space Experiment recorded a minor disturbance of atmospheric [OI] 630.0 nm emissions, both in near and in far cargo spacecraft flight paths, which might have been associated with the ACE exhaust gas injection.
机译：本文介绍了在热圈中启动Progress M-17M和Progress M-23M货运飞船的进近校正引擎（ACE）之后，在2013年4月17日和2014年7月30日进行的雷达进行实验期间进行的光学观测结果。 。在发动机运行期间记录到排放强度增强的区域。这可能与沿航天器尾气散布的暮光太阳辐射以及在630 nm处出现额外的原子氧[OI]发射有关。沿轨道和跨轨道观测到的发射区域的最大尺寸分别为〜330-350 km和〜250-270 km。 ACE开始后的第一次，发射区域沿轨道和横跨轨道的扩展率分别为〜7和〜3.5 km / s。 Progress M-17M在2 nm处干扰区域的最大强度估计为〜40–60R。进行中的M-23M太空实验记录了在近处和远处货运航天器飞行路径中大气[OI] 630.0 nm排放的轻微干扰，这可能与ACE废气注入有关。

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