... 4NS¹

Now at MPI für Aeronomie,D-37191 Katlenburg-Lindau,Germany

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... purposes²

The American National Space Science Data Center(NSSDC) maintains a webpage at http://nssdc.gsfc.nasa.gov/space/helios/coor_des.html

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...A.³

See the Nautical Almanac Offices webpage for details:
http://www.usno.navy.mil/and http://www.nao.rl.ac.uk/

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...standish:R98⁴

JPL Horizons System and DE200 at http://ssd.jpl.nasa.gov/horizons.html

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...bretagnon:88⁵

Data are available at the Institut de Mecanique Celeste at http://www.bdl.fr/

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... system⁶

JPL SPICE at http://naif.jpl.nasa.gov/naif.html

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... website⁷

http://www.space-plasma.qmul.ac.uk/heliocoords/

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... table]⁸

See also the webpage of the International Earth Rotation Service (IERS) at http://www.iers.org/

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... .3.222.1-3.224.2]⁹

Note that there is a typographic error in the mean lunar ascending longitude in [S. Tab.3.222.2], the first argument should read $\Omega=125^\circ02'40''.280$.

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...hapgood:97¹⁰

See also their webpage at http://sspg1.bnsc.rl.ac.uk/Share/Coordinates/ct_home.htm

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... systems¹¹

ESA SPENVIS webpage at http://www.spenvis.oma.be/spenvis/

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... Plasmas¹²

See under MAGLIB at http://cdpp.cesr.fr

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... 8¹³

See their webpage at http://www.ngdc.noaa.gov/IAGA/wg8/

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... (Russell and Elphic, 1978)¹⁴

See also C.T. Russell's page at http://www-ssc.igpp.ucla.edu/ssc/tutorial/magnetopause.html

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... coordinates¹⁵

See also the APL Superdarn webpage http://superdarn.jhuapl.edu/aacgm/

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... ¹⁶

See also the University of Oulu spaceweb at http://spaceweb.oulu.fi/

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... ¹⁷

See also S. Haaland's page at http://gluon.fi.uib.no/ haaland/

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...)¹⁸

See also the NSSDC Modelweb at http://nssdc.gsfc.nasa.gov/space/cgm/

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... subject¹⁹

For example K.Burnett's site at http://www.btinternet.com/$\sim$kburnett/kepler/

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... NSSDC²⁰

NSSDC at http://nssdc.gsfc.nasa.gov/space/helios/heli.html

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... page²¹

Voyager at http://vraptor.jpl.nasa.gov

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... page²²

Ulysses at http://helio.estec.esa.nl/ulysses/

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... website²³

http://www.space-plasma.qmul.ac.uk/heliocoords/

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