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00001 /************************************************************************ 00002 00003 The PLANETARY SOLUTION VSOP87 by Bretagnon P. and Francou G. can be found at 00004 ftp://ftp.imcce.fr/pub/ephem/planets/vsop87 00005 00006 I (Johannes Gajdosik) have just taken the data obtained from above 00007 (VSOP87.mer,...,VSOP87.nep) and rearranged it into this piece of software. 00008 00009 I can neigther allow nor forbid the usage of VSOP87. 00010 The copyright notice below covers not the work of Bretagnon P. and Francou G. 00011 but just my work, that is the compilation of the VSOP87 data 00012 into the software supplied in this file. 00013 00014 00015 Copyright (c) 2006 Johannes Gajdosik 00016 00017 Permission is hereby granted, free of charge, to any person obtaining a 00018 copy of this software and associated documentation files (the "Software"), 00019 to deal in the Software without restriction, including without limitation 00020 the rights to use, copy, modify, merge, publish, distribute, sublicense, 00021 and/or sell copies of the Software, and to permit persons to whom the 00022 Software is furnished to do so, subject to the following conditions: 00023 00024 The above copyright notice and this permission notice shall be included 00025 in all copies or substantial portions of the Software. 00026 00027 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 00028 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 00029 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 00030 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 00031 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 00032 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 00033 SOFTWARE. 00034 00035 This is my implementation of the VSOP87 planetary solution. 00036 I tried to optimize for speed by rearranging the terms so that 00037 for a given touple of (a[0],a[1],...,a[11]) the values 00038 (cos,sin)(a[0]*lambda[0](T)+...a[11]*lambda[11](T)) 00039 have only to be calculated once. 00040 Furthermore I used the addition formulas 00041 (cos,sin)(x+y) = ... 00042 so that for given T the functions cos and sin have only to be called 12 times. 00043 00044 ****************************************************************/ 00045 00046 00047 #ifndef _VSOP87_H_ 00048 #define _VSOP87_H_ 00049 00050 #ifdef __cplusplus 00051 extern "C" { 00052 #endif 00053 00054 #define VSOP87_MERCURY 0 00055 #define VSOP87_VENUS 1 00056 #define VSOP87_EMB 2 00057 #define VSOP87_MARS 3 00058 #define VSOP87_JUPITER 4 00059 #define VSOP87_SATURN 5 00060 #define VSOP87_URANUS 6 00061 #define VSOP87_NEPTUNE 7 00062 00063 void GetVsop87Coor(double jd,int body,double *xyz); 00064 /* Return the rectangular coordinates of the given planet 00065 and the given julian date jd expressed in dynamical time (TAI+32.184s). 00066 The origin of the xyz-coordinates is the center of the sun. 00067 The reference frame is "dynamical equinox and ecliptic J2000", 00068 which is the reference frame in VSOP87 and VSOP87A. 00069 */ 00070 00071 void GetVsop87OsculatingCoor(double jd0,double jd,int body,double *xyz); 00072 /* The oculating orbit of epoch jd0, evatuated at jd, is returned. 00073 */ 00074 00075 #ifdef __cplusplus 00076 } 00077 #endif 00078 00079 #endif