Initial Cross-Validation of the OI 135.6 nm and LBH Radiances from FY3E/TriIPM and TIMED/GUVI

Initial comparisons of the OI 135.6 nm and LBH radiances collected by the FY3E/TriIPM and TIMED/GUVI from 1 January 2023 to 15 May 2024 at 0500 LT and 1700 LT are performed in this study. The analysis reveals that the consistencies of the OI 135.6 nm and LBH radiances are better at 1700 LT than those at 0500 LT in the Northern and Southern Hemispheres, and that the consistencies of the LBH radiances are better than those of OI 135.6 nm in both hemispheres at 0500 LT and 1700 LT. Moreover, compared to the equinoxes, the measurements of FY3E/TriIPM and TIMED/GUVI agree well in summer and winter, especially at 1700 LT. Despite the observed consistencies between these two instruments, differences are also existent, especially for the OI 135.6 nm in equinoxes at 1700 LT and at latitudes between 30°S and 60°S at 0500 LT, which may be due to the altitudinal and responsivity differences between these two instruments. This study illustrates the possibility of the fusion of FUV observations from multiple sources for future modeling.