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利用全天时钠层荧光激光雷达和GPS电离层探测仪,在2009年7月22日武汉日全食期间,开展钠层与电离层的联合观测试验.观测结果表明,钠层密度半高全宽在日全食过程中稍有变窄,而日全食过后增宽,钠层峰值高度在日全食过程中稍有降低,日全食过后高度略增,钠层变化特性表现出快速的日出日落过程.电离层电子总含量和天空背景光噪声也随日全食期间太阳辐照的变化而呈现出明显下降和上升的波动特征.所不同的是,钠层原子的这种半宽度起伏变化要比电离层的变化迟缓得多,这可能是由于钠层受到日全食辐照扰动后,会产生一系列复杂的光化学反应及动力输运过程,再复合成钠原子被激光雷达探测到,有一个滞后过程,这也正好与理论模拟的结果相符.
Using sodium layer fluorescence lidar and GPS ionosphere detector all day, a joint observation of sodium layer and ionosphere was conducted during Wuhan total solar eclipse on July 22, 2009. The observation shows that the full width at half maximum of sodium layer in Japan The whole food process slightly narrowed, while widened after the total solar eclipse, the peak height of the sodium layer in the total solar eclipse during a slight decrease in height slightly increased after total solar eclipse, sodium changes showed rapid sunrise and sunset process. The total electron content and sky background light noise also show the obvious fluctuation and rising fluctuation characteristics with the change of solar radiation during total solar eclipse. The difference is that the half-width undulation of sodium layer atoms changes more than that of ionosphere This may be due to a series of complex photochemical reactions and kinetic transport processes that occur after the sodium layer is perturbed by total solar irradiance and then recombined into sodium atoms which is detected by Lidar and has a lag process Exactly in line with the theoretical simulation results.