3. Space science

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  1. Technical report

    OCTAD-S: digital fast Fourier transform spectrometers by FPGA

    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...

    Kazumasa Iwai, Yûki Kubo, Hiromitsu Ishibashi, Takahiro Naoi, Kenichi Harada, Kenji Ema, Yoshinori Hayashi and Yuichi Chikahiro

    Earth, Planets and Space 2017 69:95

    Published on: 11 July 2017

  2. Technical report

    Space environment data acquisition monitor onboard Himawari-8 for space environment monitoring on the Japanese meridian of geostationary orbit

    A space environment data acquisition monitor (SEDA) has been flown onboard the Japanese meteorological satellites ‘Himawari-8/9’ as one of the housekeeping information monitors for satellite operation. SEDA co...

    Tsutomu Nagatsuma, Kaori Sakaguchi, Yûki Kubo, Piet Belgraver, Frédéric Chastellain, Reto Muff and Takeshi Otomo

    Earth, Planets and Space 2017 69:75

    Published on: 30 May 2017

  3. Letter

    Geomagnetic storms of cycle 24 and their solar sources

    Solar activity of cycle 24 following the deep minimum between cycle 23 and cycle 24 is the weakest one since cycle 14 (1902–1913). Geomagnetic activity is also low in cycle 24. We show that this low geomagneti...

    Shinichi Watari

    Earth, Planets and Space 2017 69:70

    Published on: 19 May 2017

  4. Full paper

    Nighttime Pc3 pulsations: MM100 and MAGDAS observations

    In this paper, we present a statistical and case analysis of nighttime Pc3 pulsations observed from middle to equatorial latitudes during the year 2003. We found two groups of nighttime Pc3 pulsations. Pc3s of...

    Nadezda V. Yagova, Balazs Heilig, Vyacheslav A. Pilipenko, Akimasa Yoshikawa, Nataliya S. Nosikova, Kiyohumi Yumoto and Jan Reda

    Earth, Planets and Space 2017 69:61

    Published on: 2 May 2017

  5. Full paper

    An analysis of the 2016 Hitomi breakup event

    The breakup of Hitomi (ASTRO-H) on 26 March 2016 is analysed. Debris from the fragmentation is used to estimate the time of the event by propagating backwards and estimating the close approach with the parent ...

    Sven Flegel, James Bennett, Michael Lachut, Marek Möckel and Craig Smith

    Earth, Planets and Space 2017 69:51

    Published on: 18 April 2017

  6. Full paper

    Earliest datable records of aurora-like phenomena in the astronomical diaries from Babylonia

    The astronomical diaries from Babylonia (ADB) are excellent sources of information of natural phenomena, including astronomical ones, in pre-Christ era because it contains the record of highly continuous and s...

    Hisashi Hayakawa, Yasuyuki Mitsuma, Yusuke Ebihara, Akito Davis Kawamura, Hiroko Miyahara, Harufumi Tamazawa and Hiroaki Isobe

    Earth, Planets and Space 2016 68:195

    Published on: 29 November 2016

  7. Technical report

    Experiments using Semantic Web technologies to connect IUGONET, ESPAS and GFZ ISDC data portals

    E-science on the Web plays an important role and offers the most advanced technology for the integration of data systems. It also makes available data for the research of more and more complex aspects of the ...

    Bernd Ritschel, Friederike Borchert, Gregor Kneitschel, Günther Neher, Susanne Schildbach, Toshihiko Iyemori, Yukinobu Koyama, Akiyo Yatagai, Tomoaki Hori, Mike Hapgood, Anna Belehaki, Ivan Galkin and Todd King

    Earth, Planets and Space 2016 68:181

    Published on: 14 November 2016

  8. Full paper

    The 17 March 2015 storm: the associated magnetic flux rope structure and the storm development

    The objective of this study is (1) to determine the magnetic cloud (MC) structure associated with the 17 March 2015 storm and (2) to gain an insight into how the storm developed responding to the solar wind co...

    Katsuhide Marubashi, Kyung-Suk Cho, Rok-Soon Kim, Sujin Kim, Sung-Hong Park and Hiromitsu Ishibashi

    Earth, Planets and Space 2016 68:173

    Published on: 8 November 2016

  9. Full paper

    The first super geomagnetic storm of solar cycle 24: “The St. Patrick’s day event (17 March 2015)”

    The first super geomagnetic storm (Dst < −200 nT) of solar cycle 24 occurred on “St. Patrick’s day” (17 March 2015). Notably, it was a two-step storm. The source of the storm can be traced back to the solar ev...

    Chin-Chun Wu, Kan Liou, Ronald P. Lepping, Lynn Hutting, Simon Plunkett, Russ A. Howard and Dennis Socker

    Earth, Planets and Space 2016 68:151

    Published on: 2 September 2016

  10. Full paper

    Analysis of close conjunctions between dayside polar cap airglow patches and flow channels by all-sky imager and DMSP

    Recent imager and radar observations in the nightside polar cap have shown evidence that polar cap patches are associated with localized flow channels. To understand how flow channels propagate from the daysi...

    Boyi Wang, Yukitoshi Nishimura, Larry R. Lyons, Ying Zou, Herbert C. Carlson, Harald U. Frey and Stephen B. Mende

    Earth, Planets and Space 2016 68:150

    Published on: 2 September 2016

  11. Full paper

    Evolution of the current system during solar wind pressure pulses based on aurora and magnetometer observations

    We investigated evolution of ionospheric currents during sudden commencements using a ground magnetometer network in conjunction with an all-sky imager, which has the advantage of locating field-aligned curren...

    Yukitoshi Nishimura, Takashi Kikuchi, Yusuke Ebihara, Akimasa Yoshikawa, Shun Imajo, Wen Li and Hisashi Utada

    Earth, Planets and Space 2016 68:144

    Published on: 11 August 2016

  12. Full paper

    Solar terminator effects on middle- to low-latitude Pi2 pulsations

    To clarify the effect of the dawn and dusk terminators on Pi2 pulsations, we statistically analyzed the longitudinal phase and amplitude structures of Pi2 pulsations at middle- to low-latitude stations (GMLat...

    Shun Imajo, Akimasa Yoshikawa, Teiji Uozumi, Shinichi Ohtani, Aoi Nakamizo, Sodnomsambuu Demberel and Boris Mikhailovich Shevtsov

    Earth, Planets and Space 2016 68:137

    Published on: 2 August 2016

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