| Project/Area Number |
18340151
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Space and upper atmospheric physics
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| Research Institution | Kyoto University |
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Principal Investigator |
YAMAMOTO Mamoru Kyoto University, RISH, Professor (20210560)
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| Co-Investigator(Kenkyū-buntansha) |
FUKAO Shoichiro Kyoto University, RISH, Researcher (30026249)
SAITO Akinori Kyoto University, Gradualt school of Science, Assistant Professor (10311739)
OTSUKA Yuichi Nagoya University, STEL, RISH, Assistant Professor (40314025)
SAITO Susumu NICT, Applied Electromagnetic Research Center, Specialty Researcher (40392716)
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| Project Period (FY) |
2006 – 2007
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| Project Status |
Completed (Fiscal Year 2007)
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| Budget Amount *help |
¥17,590,000 (Direct Cost: ¥14,800,000、Indirect Cost: ¥2,790,000)
Fiscal Year 2007: ¥12,090,000 (Direct Cost: ¥9,300,000、Indirect Cost: ¥2,790,000)
Fiscal Year 2006: ¥5,500,000 (Direct Cost: ¥5,500,000)
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| Keywords | Earth planetary ionosphere / F-region E-region coupling / midlatitude ionosphere / Radar experiment / FERIX |
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| Research Abstract |
Coupling processes between plasma and neutral atmosphere is very important to understand the ionosphere. Inhomogeneity of plasma is the source of polarization electric field that maps very long along the geomagnetic field line. We obtained following results in our four research topics.
Topic 1: Brainstorming for new studies of atmosphere ionosphere coupling processes
International workshop was held in 2006 for intensive discussion on the topic. Future rocket experiment plan was made through the discussion. and is now proposed to JAXA/ISAS.
Topic 2: F-region E-region coupling observations
We conducted FERIX-2 observation campaign with the MU radar (F-region FAI observation), a portable radar in Sakata, Yamagata (E-region FAI observation), and an airglow imager (observation of neutral atmosphere density fluctuation), and directly compared FAIs in both regions. We found that F-region FAI has smaller scale structure that propagate northwestward along the wavefront of the larger structures. E-region FAIs tend to appear where F-region FAIs on the same field line are missing.
Topic 3: Experiment of small-scale FAI structures with radar imaging technique
We developed the radar imaging observations of FAIs with the MU radar. We found F- and E-region coupling relationship between the E-region FAIs and MSTID in GPS-TEC. First observations of midlatitude F-region FAIs were also successful. Radar imaging flout this topic was fully utilized in the FERIX-2 observation campaign.
Topic 4: Ionosphere beacon experiment between satellite/rocket and ground
We joined the ISAS sounding rocket observations in summer 2007, and conducted rocket-ground beacon experiment. We developed a new digital beacon receiver, and use it for the experiment.
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