An upgrade of nobeyama radioheliograph to a dual-frequency (17 and 34 GHz) system
The Nobeyama Radioheliograph, originally constructed as a 17 GHz system, was upgraded into a dual-frequency system operating at 17 and 34 GHz on a time sharing basis. For each of the 84 antennas, a frequency-selective sub-reflector, which reflects 17 GHz radio waves into the Cassegrain focus while t...
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| creator | Takano, Toshiaki Nakajima, Hiroshi Enome, Shinzo Shibasaki, Kiyoto Nishio, Masanori Hanaoka, Yoichiro Shiomi, Yasuhiko Sekiguchi, Hideaki Kawashima, Susumu Bushimata, Takeshi Shinohara, Noriyuki Torii, Chikayoshi Fujiki, Kenichi Irimajiri, Yoshihisa |
| description | The Nobeyama Radioheliograph, originally constructed as a 17 GHz system, was upgraded into a dual-frequency system operating at 17 and 34 GHz on a time sharing basis. For each of the 84 antennas, a frequency-selective sub-reflector, which reflects 17 GHz radio waves into the Cassegrain focus while transmits 34 GHz waves into the primary focus, was installed and a 34 GHz frontend receiver system was mounted in parallel with the existing 17 GHz system. No major modification was introduced to the backend system. Neither were antennas added nor their arrangement changed. With this minimal modification, we have obtained (1) an angular resolution of ∼5″ (at 34 GHz) and (2) a spectral diagnostic capability of cm- to mm-wave emissions from solar flares with temporal resolution up to 100 ms. Daily 8-hour (from ∼22:45 to ∼6:45 UT) operation at dual frequencies started late October, 1995. Final tuning of the new system, such as the calibration and development of image synthesis software tools is still under way. Flare images taken at the dual frequencies are presented and compared with that from the Yohkoh SXT as an example. |
| doi_str_mv | 10.1007/BFb0106457 |
| format | Book Chapter |
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For each of the 84 antennas, a frequency-selective sub-reflector, which reflects 17 GHz radio waves into the Cassegrain focus while transmits 34 GHz waves into the primary focus, was installed and a 34 GHz frontend receiver system was mounted in parallel with the existing 17 GHz system. No major modification was introduced to the backend system. Neither were antennas added nor their arrangement changed. With this minimal modification, we have obtained (1) an angular resolution of ∼5″ (at 34 GHz) and (2) a spectral diagnostic capability of cm- to mm-wave emissions from solar flares with temporal resolution up to 100 ms. Daily 8-hour (from ∼22:45 to ∼6:45 UT) operation at dual frequencies started late October, 1995. Final tuning of the new system, such as the calibration and development of image synthesis software tools is still under way. Flare images taken at the dual frequencies are presented and compared with that from the Yohkoh SXT as an example.</description><identifier>ISSN: 0075-8450</identifier><identifier>ISBN: 9783540627975</identifier><identifier>ISBN: 3540627979</identifier><identifier>EISSN: 1616-6361</identifier><identifier>EISBN: 9783540686934</identifier><identifier>EISBN: 3540686932</identifier><identifier>DOI: 10.1007/BFb0106457</identifier><language>eng</language><publisher>Berlin, Heidelberg: Springer Berlin Heidelberg</publisher><subject>Cassegrain Focus ; Dual Frequency ; Gyroresonance Emission ; Northern Source ; Southern Source</subject><ispartof>Coronal Physics from Radio and Space Observations, 2007, p.183-191</ispartof><rights>Springer-Verlag 1997</rights><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c747-b42cdbb0091a774edf7c8492303729be88c9e5daa718eb26178ded1bec688f403</citedby><relation>Lecture Notes in Physics</relation></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://link.springer.com/content/pdf/10.1007/BFb0106457$$EPDF$$P50$$Gspringer$$H</linktopdf><linktohtml>$$Uhttps://link.springer.com/10.1007/BFb0106457$$EHTML$$P50$$Gspringer$$H</linktohtml><link.rule.ids>775,776,780,789,27902,38232,41418,42487</link.rule.ids></links><search><contributor>Trottet, Gérard</contributor><creatorcontrib>Takano, Toshiaki</creatorcontrib><creatorcontrib>Nakajima, Hiroshi</creatorcontrib><creatorcontrib>Enome, Shinzo</creatorcontrib><creatorcontrib>Shibasaki, Kiyoto</creatorcontrib><creatorcontrib>Nishio, Masanori</creatorcontrib><creatorcontrib>Hanaoka, Yoichiro</creatorcontrib><creatorcontrib>Shiomi, Yasuhiko</creatorcontrib><creatorcontrib>Sekiguchi, Hideaki</creatorcontrib><creatorcontrib>Kawashima, Susumu</creatorcontrib><creatorcontrib>Bushimata, Takeshi</creatorcontrib><creatorcontrib>Shinohara, Noriyuki</creatorcontrib><creatorcontrib>Torii, Chikayoshi</creatorcontrib><creatorcontrib>Fujiki, Kenichi</creatorcontrib><creatorcontrib>Irimajiri, Yoshihisa</creatorcontrib><title>An upgrade of nobeyama radioheliograph to a dual-frequency (17 and 34 GHz) system</title><title>Coronal Physics from Radio and Space Observations</title><description>The Nobeyama Radioheliograph, originally constructed as a 17 GHz system, was upgraded into a dual-frequency system operating at 17 and 34 GHz on a time sharing basis. For each of the 84 antennas, a frequency-selective sub-reflector, which reflects 17 GHz radio waves into the Cassegrain focus while transmits 34 GHz waves into the primary focus, was installed and a 34 GHz frontend receiver system was mounted in parallel with the existing 17 GHz system. No major modification was introduced to the backend system. Neither were antennas added nor their arrangement changed. With this minimal modification, we have obtained (1) an angular resolution of ∼5″ (at 34 GHz) and (2) a spectral diagnostic capability of cm- to mm-wave emissions from solar flares with temporal resolution up to 100 ms. Daily 8-hour (from ∼22:45 to ∼6:45 UT) operation at dual frequencies started late October, 1995. Final tuning of the new system, such as the calibration and development of image synthesis software tools is still under way. Flare images taken at the dual frequencies are presented and compared with that from the Yohkoh SXT as an example.</description><subject>Cassegrain Focus</subject><subject>Dual Frequency</subject><subject>Gyroresonance Emission</subject><subject>Northern Source</subject><subject>Southern Source</subject><issn>0075-8450</issn><issn>1616-6361</issn><isbn>9783540627975</isbn><isbn>3540627979</isbn><isbn>9783540686934</isbn><isbn>3540686932</isbn><fulltext>true</fulltext><rsrctype>book_chapter</rsrctype><creationdate>2007</creationdate><recordtype>book_chapter</recordtype><sourceid/><recordid>eNpFkEtPAjEUhesrEZGNv6BLXYzeTh-3XSIRMCExJuwn7fQOoDDFKSzw14vRhNVJzpdzFh9jdwIeBQA-PY8DCDBK4xkbOLRSKzDWOKnOWU8YYQojjbg4sRId6kvWO451YZWGa3aT8wdAqZUSPfY-bPl-u-h8JJ4a3qZAB7_x_Fis0pLWq3Rk2yXfJe553Pt10XT0tae2PvB7gdy3kUvFJ9PvB54PeUebW3bV-HWmwX_22Xz8Mh9Ni9nb5HU0nBU1KiyCKusYAoATHlFRbLC2ypUSJJYukLW1Ix29R2EplEagjRRFoNpY2yiQfXb_d5u33apdUFeFlD5zJaD6NVWdTMkfaBZUvg</recordid><startdate>20070502</startdate><enddate>20070502</enddate><creator>Takano, Toshiaki</creator><creator>Nakajima, Hiroshi</creator><creator>Enome, Shinzo</creator><creator>Shibasaki, Kiyoto</creator><creator>Nishio, Masanori</creator><creator>Hanaoka, Yoichiro</creator><creator>Shiomi, Yasuhiko</creator><creator>Sekiguchi, Hideaki</creator><creator>Kawashima, Susumu</creator><creator>Bushimata, Takeshi</creator><creator>Shinohara, Noriyuki</creator><creator>Torii, Chikayoshi</creator><creator>Fujiki, Kenichi</creator><creator>Irimajiri, Yoshihisa</creator><general>Springer Berlin Heidelberg</general><scope/></search><sort><creationdate>20070502</creationdate><title>An upgrade of nobeyama radioheliograph to a dual-frequency (17 and 34 GHz) system</title><author>Takano, Toshiaki ; Nakajima, Hiroshi ; Enome, Shinzo ; Shibasaki, Kiyoto ; Nishio, Masanori ; Hanaoka, Yoichiro ; Shiomi, Yasuhiko ; Sekiguchi, Hideaki ; Kawashima, Susumu ; Bushimata, Takeshi ; Shinohara, Noriyuki ; Torii, Chikayoshi ; Fujiki, Kenichi ; Irimajiri, Yoshihisa</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c747-b42cdbb0091a774edf7c8492303729be88c9e5daa718eb26178ded1bec688f403</frbrgroupid><rsrctype>book_chapters</rsrctype><prefilter>book_chapters</prefilter><language>eng</language><creationdate>2007</creationdate><topic>Cassegrain Focus</topic><topic>Dual Frequency</topic><topic>Gyroresonance Emission</topic><topic>Northern Source</topic><topic>Southern Source</topic><toplevel>online_resources</toplevel><creatorcontrib>Takano, Toshiaki</creatorcontrib><creatorcontrib>Nakajima, Hiroshi</creatorcontrib><creatorcontrib>Enome, Shinzo</creatorcontrib><creatorcontrib>Shibasaki, Kiyoto</creatorcontrib><creatorcontrib>Nishio, Masanori</creatorcontrib><creatorcontrib>Hanaoka, Yoichiro</creatorcontrib><creatorcontrib>Shiomi, Yasuhiko</creatorcontrib><creatorcontrib>Sekiguchi, Hideaki</creatorcontrib><creatorcontrib>Kawashima, Susumu</creatorcontrib><creatorcontrib>Bushimata, Takeshi</creatorcontrib><creatorcontrib>Shinohara, Noriyuki</creatorcontrib><creatorcontrib>Torii, Chikayoshi</creatorcontrib><creatorcontrib>Fujiki, Kenichi</creatorcontrib><creatorcontrib>Irimajiri, Yoshihisa</creatorcontrib></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Takano, Toshiaki</au><au>Nakajima, Hiroshi</au><au>Enome, Shinzo</au><au>Shibasaki, Kiyoto</au><au>Nishio, Masanori</au><au>Hanaoka, Yoichiro</au><au>Shiomi, Yasuhiko</au><au>Sekiguchi, Hideaki</au><au>Kawashima, Susumu</au><au>Bushimata, Takeshi</au><au>Shinohara, Noriyuki</au><au>Torii, Chikayoshi</au><au>Fujiki, Kenichi</au><au>Irimajiri, Yoshihisa</au><au>Trottet, Gérard</au><format>book</format><genre>bookitem</genre><ristype>CHAP</ristype><atitle>An upgrade of nobeyama radioheliograph to a dual-frequency (17 and 34 GHz) system</atitle><btitle>Coronal Physics from Radio and Space Observations</btitle><seriestitle>Lecture Notes in Physics</seriestitle><date>2007-05-02</date><risdate>2007</risdate><spage>183</spage><epage>191</epage><pages>183-191</pages><issn>0075-8450</issn><eissn>1616-6361</eissn><isbn>9783540627975</isbn><isbn>3540627979</isbn><eisbn>9783540686934</eisbn><eisbn>3540686932</eisbn><abstract>The Nobeyama Radioheliograph, originally constructed as a 17 GHz system, was upgraded into a dual-frequency system operating at 17 and 34 GHz on a time sharing basis. For each of the 84 antennas, a frequency-selective sub-reflector, which reflects 17 GHz radio waves into the Cassegrain focus while transmits 34 GHz waves into the primary focus, was installed and a 34 GHz frontend receiver system was mounted in parallel with the existing 17 GHz system. No major modification was introduced to the backend system. Neither were antennas added nor their arrangement changed. With this minimal modification, we have obtained (1) an angular resolution of ∼5″ (at 34 GHz) and (2) a spectral diagnostic capability of cm- to mm-wave emissions from solar flares with temporal resolution up to 100 ms. Daily 8-hour (from ∼22:45 to ∼6:45 UT) operation at dual frequencies started late October, 1995. Final tuning of the new system, such as the calibration and development of image synthesis software tools is still under way. Flare images taken at the dual frequencies are presented and compared with that from the Yohkoh SXT as an example.</abstract><cop>Berlin, Heidelberg</cop><pub>Springer Berlin Heidelberg</pub><doi>10.1007/BFb0106457</doi><tpages>9</tpages></addata></record> |
| fulltext | fulltext |
| identifier | ISSN: 0075-8450 |
| ispartof | Coronal Physics from Radio and Space Observations, 2007, p.183-191 |
| issn | 0075-8450 1616-6361 |
| language | eng |
| recordid | cdi_springer_books_10_1007_BFb0106457 |
| source | Springer Books |
| subjects | Cassegrain Focus Dual Frequency Gyroresonance Emission Northern Source Southern Source |
| title | An upgrade of nobeyama radioheliograph to a dual-frequency (17 and 34 GHz) system |
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