Airglow observed by a full-band imager together with multi-instruments in Taiwan during nighttime of 1 November 2021

0580016 - ÚFA 2025 RIV NL eng J - Journal Article
Liu, J. Y. - Rajesh, P.K. - Liao, Y.-A. - Chum, Jaroslav - Kan, K.-W. - Lee, I-T.
Airglow observed by a full-band imager together with multi-instruments in Taiwan during nighttime of 1 November 2021.
Advances in Space Research. Roč. 73, č. 1 (2024), s. 663-671. ISSN 0273-1177. E-ISSN 1879-1948
Institutional support: RVO:68378289
Keywords : Airglow * All-sky Imager * TEC * ROTI * Doppler shift * Equatorial plasma bubble * FORMOSAT-7/COSMIC
OECD category: Meteorology and atmospheric sciences
Impact factor: 2.6, year: 2022
Method of publishing: Limited access
https://www.sciencedirect.com/science/article/pii/S0273117723007354?via%3Dihub

This study demonstrates an innovative approach of using a full-band chromatic all-sky imager, routinely operational for monitoring sky conditions at Lulin observatory (23.5°N, 120.9°E, 12.5° N magnetic latitude), Taiwan, to investigate equatorial plasma bubbles (EPBs). Distinct north–south aligned EPB depletions are identified by decomposing the color-scale images to respective red (centered at 630 nm) and green (520 nm) channels, where blue channel (470 nm) helps for background suppression. The intense EPBs, drifting eastwards at 60–100 m/s velocity, are also associated with reduced total electron content (TEC) values: increased ROTI (rate of TEC index): remarkable range spread-F: and prominent fluctuations in Doppler frequency shifts as well as FORMOSAT-7/COSMIC-2 electron density/S4 scintillation profiles. The results show that a full-band chromatic imager offers a cost-effective alternative to investigate the EPBs usually detected in OI 630.0 and 557.7 nm airglow emissions.
Permanent Link: https://hdl.handle.net/11104/0348830