Observations of luni-solar and free core nutation
An analysis of the differences between observed nutation angles and the 1980 IAU nutation theory shows the existence of currently unmodeled effects. An empirical set of corrections to the 1980 IAU nutation theory is presented and compared with current geophysical models. A retrograde periodic variat...
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| Veröffentlicht in: | The Astronomical journal 1991-11, Vol.102 (5), p.1889-1895 |
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| container_end_page | 1895 |
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| container_issue | 5 |
| container_start_page | 1889 |
| container_title | The Astronomical journal |
| container_volume | 102 |
| creator | MCCARTHY, D. D LUZUM, B. J |
| description | An analysis of the differences between observed nutation angles and the 1980 IAU nutation theory shows the existence of currently unmodeled effects. An empirical set of corrections to the 1980 IAU nutation theory is presented and compared with current geophysical models. A retrograde periodic variation (period about 418 days), which may be related to the theoretical free core nutation, is seen. (Author) |
| doi_str_mv | 10.1086/116011 |
| format | Article |
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J</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Observations of luni-solar and free core nutation</atitle><jtitle>The Astronomical journal</jtitle><date>1991-11-01</date><risdate>1991</risdate><volume>102</volume><issue>5</issue><spage>1889</spage><epage>1895</epage><pages>1889-1895</pages><issn>0004-6256</issn><eissn>1538-3881</eissn><coden>ANJOAA</coden><abstract>An analysis of the differences between observed nutation angles and the 1980 IAU nutation theory shows the existence of currently unmodeled effects. An empirical set of corrections to the 1980 IAU nutation theory is presented and compared with current geophysical models. A retrograde periodic variation (period about 418 days), which may be related to the theoretical free core nutation, is seen. (Author)</abstract><cop>Chicago, IL</cop><pub>University of Chicago Press</pub><doi>10.1086/116011</doi><tpages>7</tpages></addata></record> |
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| identifier | ISSN: 0004-6256 |
| ispartof | The Astronomical journal, 1991-11, Vol.102 (5), p.1889-1895 |
| issn | 0004-6256 1538-3881 |
| language | eng |
| recordid | cdi_proquest_miscellaneous_25124436 |
| source | Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals; Alma/SFX Local Collection |
| subjects | Astrometry and reference systems Astronomy Earth, ocean, space Exact sciences and technology Fundamental astronomy Fundamental astronomy and astrophysics. Instrumentation, techniques, and astronomical observations |
| title | Observations of luni-solar and free core nutation |
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