[IGPP Everyone] Happening shortly - Last Seminar for the Spring Quarter - SPACE SCIENCE SEMINAR - Spring Quarter - 3:30pm - Friday June 5, 2020 - CCLE Zoom

[Marjorie Sowmendran]

Reminder 

Today 

Last Seminar for the Spring Quarter 


SPACE PHYSICS SEMINAR 




USE THE CCLE ZOOM LINK PROVIDED BELOW 








https://ccle.ucla.edu/mod/zoom/view.php?id=2939559 





Date/Time: June 5, 2020/ 03:30 PM Pacific Time (US and Canada) 







SPACE PHYSICS SEMINAR 

DEPARTMENT OF EARTH, PLANETARY, AND SPACE SCIENCES 

DEPARTMENT OF ATMOSPHERIC AND OCEANIC SCIENCES 

UNIVERSITY OF CALIFORNIA, LOS ANGELES 

(AOS M275B, EPSS M288B) 






Scientific Ballooning for Imaging Aurora under the Sun 

- The BALBOA Project: Then, Now, and Next 


Xiaoyan Zhou 


Department of Earth, Planetary, and Space Sciences, UCLA 




Abstract: More than 500 years ago, when Vasco Núñez de Balboa traveled to the New World, he must not have realized that his legacy would not only be cast in currency, but branded for space exploration. Our investigation and the pathfinder mission of BALloon-Based Observations for Sunlit Aurora is therefore named BALBOA, after this 15 th -century Spanish explorer and conquistador. The auroral phenomenon is the most visible manifestation of the solar wind-magnetosphere-ionosphere coupling. It is the processes in dayside that initiate the solar wind energy and momentum input, and shape global dynamics. The scientific motivation of BALBOA is to understand dayside auroras, the auroral asymmetry between southern and northern hemispheres, and between dayside and nightside hemispheres/magnetospheres. Since 1892, when the first useful auroral image was obtained, auroral forms and their dynamics have been acquired only when the aurora is in darkness. However, technology development in the Space Age has widened our imagination, stimulated our courage, and granted us tools to challenge impossibilities. Barriers of imaging sunlit auroras are mainly due to the sunlight contamination from Rayleigh scattering, i.e., the sky is too bright to see aurora from the ground when the Sun is near and above horizon. Nevertheless, another fact brings us hope, which is that sky brightness decreases with increasing altitude and wavelength. The feasibility of imaging sunlit aurora from balloons was confirmed when the N2+ Meinel band around ~1110 nm was recorded during twilight that resembles the sky brightness at balloon altitude in Antarctica. This presentation briefly reviews dayside auroras measured from the ground and space, as well as their mechanisms; the recent and current status of the BALBOA project; and our short- and long-term plans. 





Friday June 5, 2020 




In-charge: C. T. Russell 






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