Zobrazeno 1 - 10
of 75
pro vyhledávání: '"Kazumasa, Iwai"'
Autor:
Masumi Shimojo, Kazumasa Iwai
Publikováno v:
Geoscience Data Journal, Vol 10, Iss 1, Pp 114-129 (2023)
Abstract Monitoring observations of solar microwave fluxes and their polarization began in Japan during the 1950s at Toyokawa and Mitaka. At present (April 2022), monitoring observations continues with the Nobeyama Radio Polarimeters (NoRP) at the No
Externí odkaz:
https://doaj.org/article/94a150ea2180461484f6ec6c9cbc646f
Autor:
Stephen M. White, Masumi Shimojo, Kazumasa Iwai, Timothy S. Bastian, Gregory D. Fleishman, Dale E. Gary, Jasmina Magdalenic, Angelos Vourlidas
Publikováno v:
The Astrophysical Journal, Vol 969, Iss 1, p 3 (2024)
This paper investigates the incidence of coherent emission in solar radio bursts, using a revised catalog of 3800 solar radio bursts observed by the Nobeyama Radio Polarimeters from 1988 to 2023. We focus on the 1.0 and 2.0 GHz data, where radio flux
Externí odkaz:
https://doaj.org/article/e841c78e38cd4498b3c10c4a9bbf04a2
Publikováno v:
The Astrophysical Journal, Vol 965, Iss 2, p 170 (2024)
Thermal microwave emissions detected from stellar atmospheres contain information on stellar activity. However, even for the Sun, the relationship between multifrequency microwave data and other activity indices remains unclear. We investigated the r
Externí odkaz:
https://doaj.org/article/d2ae2d3d84224a23bef63e2ec4ec2061
Autor:
Kanya Kusano, Kiyoshi Ichimoto, Mamoru Ishii, Yoshizumi Miyoshi, Shigeo Yoden, Hideharu Akiyoshi, Ayumi Asai, Yusuke Ebihara, Hitoshi Fujiwara, Tada-Nori Goto, Yoichiro Hanaoka, Hisashi Hayakawa, Keisuke Hosokawa, Hideyuki Hotta, Kornyanat Hozumi, Shinsuke Imada, Kazumasa Iwai, Toshihiko Iyemori, Hidekatsu Jin, Ryuho Kataoka, Yuto Katoh, Takashi Kikuchi, Yûki Kubo, Satoshi Kurita, Haruhisa Matsumoto, Takefumi Mitani, Hiroko Miyahara, Yasunobu Miyoshi, Tsutomu Nagatsuma, Aoi Nakamizo, Satoko Nakamura, Hiroyuki Nakata, Naoto Nishizuka, Yuichi Otsuka, Shinji Saito, Susumu Saito, Takashi Sakurai, Tatsuhiko Sato, Toshifumi Shimizu, Hiroyuki Shinagawa, Kazuo Shiokawa, Daikou Shiota, Takeshi Takashima, Chihiro Tao, Shin Toriumi, Satoru Ueno, Kyoko Watanabe, Shinichi Watari, Seiji Yashiro, Kohei Yoshida, Akimasa Yoshikawa
Publikováno v:
Earth, Planets and Space, Vol 73, Iss 1, Pp 1-29 (2021)
Abstract Although solar activity may significantly impact the global environment and socioeconomic systems, the mechanisms for solar eruptions and the subsequent processes have not yet been fully understood. Thus, modern society supported by advanced
Externí odkaz:
https://doaj.org/article/da97472c80ab47bcb6e874f2ad039b84
Publikováno v:
Earth, Planets and Space, Vol 73, Iss 1, Pp 1-10 (2021)
Abstract Coronal mass ejections (CMEs) cause various disturbances of the space environment; therefore, forecasting their arrival time is very important. However, forecasting accuracy is hindered by limited CME observations in interplanetary space. Th
Externí odkaz:
https://doaj.org/article/a85c1d51ca1248139b4c1f17ba24813b
Publikováno v:
Earth, Planets and Space, Vol 71, Iss 1, Pp 1-11 (2019)
Abstract Coronal mass ejections (CMEs) cause disturbances in the environment of the Earth when they arrive at the Earth. However, the prediction of the arrival of CMEs still remains a challenge. We have developed an interplanetary scintillation (IPS)
Externí odkaz:
https://doaj.org/article/9da18375f9f344f3ac0d798168edc98b
Autor:
Kazumasa Iwai, Yûki Kubo, Hiromitsu Ishibashi, Takahiro Naoi, Kenichi Harada, Kenji Ema, Yoshinori Hayashi, Yuichi Chikahiro
Publikováno v:
Earth, Planets and Space, Vol 69, Iss 1, Pp 1-8 (2017)
Abstract We have developed a digital fast Fourier transform spectrometer made of an analog-to-digital converter (ADC) and a field-programmable gate array (FPGA). The base instrument has independent ADC and FPGA modules, which allow us to implement di
Externí odkaz:
https://doaj.org/article/cb6431c24b4c41d3a0d57471bb5940da
Autor:
Masumi Shimojo, Kazumasa Iwai
Publikováno v:
Geoscience Data Journal. 10:114-129
Monitoring observations of solar microwave fluxes and their polarization began in Japan during the 1950s at Toyokawa and Mitaka. At present (April 2022), monitoring observations continue with the Nobeyama Radio Polarimeters (NoRP) at the Nobeyama cam
Publikováno v:
Solar Physics. 298
Interplanetary scintillation (IPS) analysis is an effective technique for remotely sensing solar-wind disturbances, such as stream-interaction regions (SIRs) and coronal mass ejections (CMEs), which are the main drivers of space weather. Here, we emp
Publikováno v:
Solar-Terrestrial Environmental Prediction ISBN: 9789811977640
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bbba51783ddbd221ef1e92881a4c9c6f
https://doi.org/10.1007/978-981-19-7765-7_8
https://doi.org/10.1007/978-981-19-7765-7_8