Fig. 1. Real sky pictures of the Lhasa solar eclipse on June 21, 2020, in Lhasa, Tibet
Fig. 2. Real sky pictures of the golden edge annular eclipse on June 21, 2020, in Ngari, Tibet
Fig. 3. (a) Lhasa spectrometers; (b) Lhasa Pyranometer; (c) Ngari observation site
Fig. 4. Three dimensional spectral characteristics for the solar eclipse on June 21, 2020 in Singgekapap, Ngari, Tibet
Fig. 5. Three dimensional spectral characteristics for clear sky on June 22, 2020 in Singgekapap, Ngari, Tibet
Fig. 6. Three dimensional spectral characteristics of the solar eclipse on June 21, 2020 in Lhasa
Fig. 7. Three dimensional spectral features of quasi-clear sky on June 26, 2020 in Lhasa
Fig. 8. Spectral variation during the annular eclipse in Ngari
Fig. 9. Spectral features during annular solar eclipse in Lhasa
Fig. 10. Global solar irradiance for the annular eclipse in Ngari
Fig. 11. Global solar irradiance for the annular eclipse in Lhasa
Fig. 12. Solar UVB for the solar eclipse in Lhasa
Site | Local noon | Altitude /m | Longitude/ latitude | Magnitude of eclipse | First contact phase | Maximum phase | Last contact phase | Duration of the eclipse | Weather |
---|
Gnari | 14:41 | 4 300 | 80°5'45″E 32°30'22″N | 0.995 | 13:00:59 | 14:44:14 | 16:28:25 | 03:27:26 | Partial clouds | Lhasa | 13:57 | 3 685 | 91°10'40″E 29°38'48″N | 0.953 | 13:26:44 | 15:13:09 | 16:50:42 | 03:23:58 | Partial clouds |
|
Table 1. Information of the solar eclipse on June 21, 2020 and its observation sites in Tibet
日食过程 | 波长 /nm | 单色光强峰值 /(mW·m-2) |
---|
初亏(13:01) | | 1 669.234 | 食甚(14:41) | 476.13 | 61.936 | 复圆(16:28) | | 1 522.388 |
|
Table 2. Peak variations of the strongest monochromatic light for the solar eclipse in Ngari
日食过程 | 波长 /nm | 单色光强峰值 /(mW·m-2) |
---|
初亏(13:27) | | 1 563.876 | 食甚(15:13) | 476.61 | 26.391 | 复圆(16:51) | | 735.191 |
|
Table 3. Peak variations of the strongest monochromatic light for the solar eclipse in Lhasa