## 3 Results
### Variations in Infrared Radiance at NO 5.3 \(\mu\)m
\begin{table}
\begin{tabular}{c c c c} \hline \hline
**No.** & **Orbit Number** & **Date** & **Time (UT)** \\ \hline (a) & 10,538 & 11-18 & 23:06 \\ (b) & 10,553 & 11-19 & 23:17 \\ (c) & 10,562 & 11-20 & 13:51 \\ (d) & 10,563 & 11-20 & 15:27 \\ (e) & 10,565 & 11-20 & 18:42 \\ (f) & 10,566 & 11-20 & 20:19 \\ (g) & 10,567 & 11-20 & 21:57 \\ (h) & 10,568 & 11-20 & 23:34 \\ (i) & 10,569 & 11-21 & 01:11 \\ (j) & 10,590 & 11-22 & 11:10 \\ (k) & 10,607 & 11-23 & 14:42 \\ (l) & 10,609 & 11-23 & 17:57 \\ \hline \hline \end{tabular}
\end{table} 
Table 2: Information about the 12 selected sets of orbital data. the radiance values in the longitude range of 200-220\({}^{\circ}\) and latitude range of \(-\)30\({}^{\circ}\) to 40\({}^{\circ}\) at around 13:00 UT on 23 November, which is caused by the \"secondary aurora\" observed at around 16:00 UT on 22 November, as shown in Figure 1. Additionally, Figure 4 illustrates the coverage of the latitude and longitude range during the SABER measurements, which gradually transitioned from the \"north-view\" to the \"south-view\" mode. In Figure 4l, a decrease in radiance values is observed in the range of longitude 200-220\({}^{\circ}\) and latitude \(-\)30\({}^{\circ}\) to 40\({}^{\circ}\), gradually approaching the quiet state level. It is noteworthy that during the first \"recovery phase\" of radiance (Figure 4h-j), there exists a difference between the northern and southern hemispheres, with the southern hemisphere exhibiting a lag while the northern hemisphere begins the recovery process first. This phenomenon was initially attributed to the effect of coordinate system selection [54], but was refuted by [PERSON] in 2018 and later confirmed to be influenced by the radial wind in 2021 [36]. A statistical analysis was performed on the 12 sets of NO 5.3 \(\upmu\)m radiance values data in Figure 4, otherwise, 5 sets of orbital data with approximately the same latitude and longitude regions were included to enhance the overall understanding of the aurora process. The orbit information and statistical characteristics of each set of radiance values was shown in Table 3, including the orbit number, date, measurement time of the orbital data, mean (AVE), STD, MIN, and MAX values. These statistics are graphically represented in Figures 5 and 6 for visualization purposes. In Figure 5, the orbit number is utilized as the X-axis, with specific time information available in Table 3. In Figure 6, to enhance the  
Figure 4: Longitudinal and latitudinal distribution of NO 5.3 \(\upmu\)m radiance during 18–23 November 2003. Measurement dates and times are: (**a**) 11-18 23:06 UT; (**b**): 11-19 23:17 UT; (**c**): 11-20 13:51 UT; (**d**): 11-20 15:27 UT; (**e**): 11-20 18:42 UT; (**f**): 11-20 20:19 UT; (**g**): 11-20 21:57 UT; (**h**): 11-20 23:34 UT; (**i**): 11-21 01:11 UT; (**j**): 11-22 11:10 UT; (**k**): 11-23 14:42 UT; (**l**): 11-23 17:57 UT. visualization of the dispersion, the 17 sets of orbital information are defined as 17 events, with each event utilized as the X-axis. Figure 5 shows that after the aurora occurred on 20 November, as measured by orbit 10,553, the maximum radiance value increased significantly. It reached a peak of \(7.91\times 10^{-3}\) W/m\({}^{2}\)/sr at orbit 10,569, which is about 10 times higher than the maximum value during the quiet period. However, the minimum value showed a small increase of only \(6.00\times 10^{-4}\) W/m\({}^{2}\)/sr during the entire auroral disturbance. This can be attributed to the fact that the aurora only occurs within a specific range of the atmosphere, causing a greater impact on the NO 5.3 \(\upmu\)m radiance value within that range. In contrast, the radiance change in other atmospheric regions is minimal, resulting in a more significant change in the maximum value but a minor change in the minimum value. It is important to note a slight decrease of approximately 1.00 \(\times\) 10\({}^{-3}\) W/m\({}^{2}\)/sr in the maximum radiance value during the measurement period from orbit 10,565 to orbit 10,567.