48 citations · 136 across the 8 of their papers we have counts for
9 papers
Convergence Rates of Gaussian Process Thompson Sampling for Efficient Global Optimization
Haowei Wang, Yilin Zheng
Efficient global optimization aims to identify a global optimum of an expensive black-box function within a limited evaluation budget . We investigate the convergence rates of G…
Contemporaneous Appearances of Auroral Spiral and Transpolar Arc: Polar UVI Observations and Global MHD Simulations
Motoharu Nowada, Yukinaga Miyashita, Aoi Nakamizo +2
A local vortex-structured aurora and a large-scale transpolar arc (TPA) were contemporaneously observed by the Polar ultraviolet imager (UVI) during the late recovery phase of a su…
Auroral imaging with combined Suomi 100 nanosatellite and ground-based observations: A case study
Esa Kallio, Ari-Matti Harri, Olli Knuuttila +9
Auroras can be regarded as the most fascinating manifestation of space weather and they are continuously observed by ground-based and, nowadays more and more, also by space-based m…
Auroral Morphological Changes to the Formation of Auroral Spiral during the Late Substorm Recovery Phase: Polar UVI and Ground All-Sky Camera Observations
Motoharu Nowada, Yukinaga Miyashita, Noora Partamies +2
The ultraviolet imager (UVI) of the Polar spacecraft and an all-sky camera at Longyearbyen contemporaneously detected an auroral vortex structure (so-called "auroral spiral") on 10…
Energetic Electron Precipitation Occurrence Rates Determined Using the Syowa East SuperDARN Radar
Emma C. Bland, Noora Partamies, Erkka Heino +2
We demonstrate that the Super Dual Auroral Radar Network (SuperDARN) radar at Syowa station, Antarctica, can be used to detect high frequency radio wave attenuation in the D region…
Patch Size Evolution During Pulsating Aurora
N. Partamies, K. Bolmgren, E. Heino +3
We report both decreasing and increasing trends in the patch sizes during pulsating aurora events. About 150 pulsating auroral events over the Fennoscandian Lapland have been succe…
Cosmic Noise Absorption During Solar Proton Events in WACCM-D and Riometer Observations
Erkka Heino, Pekka T. Verronen, Antti Kero +2
Solar proton events (SPEs) cause large-scale ionization in the middle atmosphere leading to ozone loss and changes in the energy budget of the middle atmosphere. The accurate imple…
Statistical study of auroral omega bands
Noora Partamies, James M. Weygand, Liisa Juusola
The presence of very few statistical studies on auroral omega bands motivated us to test-use a semi-automatic method for identifying large-scale undulations of the diffuse aurora b…
Eastward-expanding auroral surges observed in the post-midnight sector during a multiple-onset substorm
Yoshimasa Tanaka, Yasunobu Ogawa, Akira Kadokura +9
We present three eastward-expanding auroral surge (EEAS) events that were observed intermittently at intervals of about 15 min in the post-midnight sector (01:55-02:40 MLT) by all-…