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 | Jupiter's synchrotron radiation data
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| Description: |
| Absolute flux densities of Jupiter's synchrotron radiation at frequencyes of 325 and/or 785 MHz measured using the Iitate Planetary Radio Telescope. |
| Acknowledgement: "We would like to present the following two guidelines. The 1st one concerns what we would like you to do when you use the data. 1. Tell us what you are working on. If your project coincides with one that core team members are working on, that can lead to a fruitful collaboration. This will also work as a way for you to gain better insights into the IPRT data. The 2nd one concerns what you do when you make any presentations and publications using the data. 2. Co-authorship: When the data forms an important part of your work, we would like you to offer us co-authorship. 3. Acknowledgements: When you write a paper, please inculde the following sentence: ""IPRT(Iitate Planetary Radio Telescope) is a Japanese radio telescope developed and operated by Tohoku University."" You should also refer the following two papers in your reference list. 4. Entry to publication list: When your paper is accepted, or when you make a presentation at a conference on your result, please let us know by sending email to ""misawa(at)pparc.gp.tohoku.ac.jp""." |
| ReleaseDate: 2022-04-01T00:00:00 |
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Contact
(PrincipalInvestigator):
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| Hiroaki Misawa, Planetary Plasma and Atmospheric Research Center (PPARC), Graduate School of Science, Tohoku University, misawa(at)pparc.gp.tohoku.ac.jp |
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| AccessInformation: |
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URL: http://iprt.gp.tohoku.ac.jp/ |
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Format: FITS |
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| Measurement
Type: Spectrum |
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| Time
Span: |
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StartDate: 2004-01-01T00:00:00 |
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StopDate: 2020-12-31T12:00:00 |
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| Observed
Region: Jupiter |
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| Keywords: Jupiter synchrotron radiation |
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| Instrument: |
| Name: Iitate Planetary Radio Telescope |
| Description: The Iitate Planetary Radio Telescope (IPRT), which measures meter to decimeter radio waves, was developed at the Iitate observatory of Tohoku University (Iitate village, Fukushima prefecture, Japan; 37d 42'N, 140d 41'E). IPRT is dedicated to observing planetary radio emissions, particularly synchrotron radiation from Jupiter's radiation belt. The antenna is an offset parabola whose physical aperture area and efficiency are 1023 m^2 and 65%, respectively, and it is composed of two separate rectangular parabolic sections. The primary feed antenna, which converts the radio wave into an electric signal, is located at the focus and consists of crossed half-wave dipoles with a plane reflector to make total flux and polarization measurements. A beam forming technique has been used for the feed system to achieve the high efficiency. Received signals from the two sections are synthesized by using the phased-array technique. The primary observation frequency is 325 MHz, which is authorized as a radio astronomical observation band. The another receiver at 785 MHz is also installed to make spectrum observation. The receiver system is composed of front-end and back-end receivers installed in temperature-stabilized boxes. Low noise amplifiers (LNA) are used as the 1st stage signal amplifiers of the front-end receiver, and their noise temperatures are typically 80 and 50 K for 325 and 785 MHz, respectively. Standard noise sources are installed in the front-end receiver in order to measure the on-site gain and noise temperature. The minimum detection sensitivity of IPRT is 0.1 Jy at both frequencies, given a receiver band width of 10 MHz and an integration time of 10 seconds. References : Misawa, H., R. Kudo, F. Tsuchiya, A. Morioka, and T. Kondo, Development of a primary feed system for the parabolic rectangular reflector antenna dedicated for planetary radio emission, Proc. 3rd CRL TDC Symp., 57 (2003). Tsuchiya, F., H. Misawa, K. Imai, and A. Morioka (2011), Shortâterm changes in Jupiter’s synchrotron radiation at 325 MHz: Enhanced radial diffusion in Jupiter’s radiation belt driven by solar UV/EUV heating, J.Geophys. Res., 116, A09202, doi:10.1029/2010JA016303. |
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Contact
(PrincipalInvestigator):
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| Hiroaki Misawa, Planetary Plasma and Atmospheric Research Center (PPARC), Graduate School of Science, Tohoku University, misawa(at)pparc.gp.tohoku.ac.jp |
| InstrumentType: Antenna |
| InvestigationName: IPRT (Iitate Planetary Radio Telescope) |
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| Observatory: |
| Name: Iitate Observatory, Tohoku University |
| Description: Maeda, Iitate, Soma, Fukushima, Japan |
| Location: |
| ObservatoryRegion: Earth.Surface |
| Latitude: 37.7 |
| Longitude: 140.67 |
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Observed
Data:
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Original
Metadata Files:
iprt_jup_numerical.xml:
Jupiter's synchrotron radiation data
(Observatory)
iitate.xml:
Iitate Observatory, Tohoku University
(Instrument)
iprt.xml:
Iitate Planetary Radio Telescope
(Person)
Hiroaki.Misawa.xml:
Hiroaki Misawa
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