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#/*-----------------------------------------------------------------*/
#/*!
# \file pycompute.py
# \brief simple computation with a file and a date provided on the command line
# e.g.: python pycompute myfile.dat 2.451545E+06
# or .e.g: python pycompute myfile.bsp myfile.tpc 2.451545E+06
#
# \author M. Gastineau
# Astronomie et Systemes Dynamiques, IMCCE, CNRS, Observatoire de Paris.
#
# Copyright, 2016, 2017, CNRS
# email of the author : Mickael.Gastineau@obspm.fr
#
# History:
#*/
#/*-----------------------------------------------------------------*/
#
#
#/*-----------------------------------------------------------------*/
#/* License of this file :
# This file is "triple-licensed", you have to choose one of the three licenses
# below to apply on this file.
#
# CeCILL-C
# The CeCILL-C license is close to the GNU LGPL.
# ( http://www.cecill.info/licences/Licence_CeCILL-C_V1-en.html )
#
# or CeCILL-B
# The CeCILL-B license is close to the BSD.
# (http://www.cecill.info/licences/Licence_CeCILL-B_V1-en.txt)
#
# or CeCILL v2.1
# The CeCILL license is compatible with the GNU GPL.
# ( http://www.cecill.info/licences/Licence_CeCILL_V2.1-en.html )
#
#
# This library is governed by the CeCILL-C, CeCILL-B or the CeCILL license under
# French law and abiding by the rules of distribution of free software.
# You can use, modify and/ or redistribute the software under the terms
# of the CeCILL-C,CeCILL-B or CeCILL license as circulated by CEA, CNRS and INRIA
# at the following URL "http://www.cecill.info".
#
# As a counterpart to the access to the source code and rights to copy,
# modify and redistribute granted by the license, users are provided only
# with a limited warranty and the software's author, the holder of the
# economic rights, and the successive licensors have only limited
# liability.
#
# In this respect, the user's attention is drawn to the risks associated
# with loading, using, modifying and/or developing or reproducing the
# software by the user in light of its specific status of free software,
# that may mean that it is complicated to manipulate, and that also
# therefore means that it is reserved for developers and experienced
# professionals having in-depth computer knowledge. Users are therefore
# encouraged to load and test the software's suitability as regards their
# requirements in conditions enabling the security of their systems and/or
# data to be ensured and, more generally, to use and operate it in the
# same conditions as regards security.
#
# The fact that you are presently reading this means that you have had
# knowledge of the CeCILL-C,CeCILL-B or CeCILL license and that you accept its terms.
# */
# /*-----------------------------------------------------------------*/
from calcephpy import *
import sys
#/*-----------------------------------------------------------------*/
#/* print coordinates */
#/*-----------------------------------------------------------------*/
def printcoord(PV,name):
print('{0} :\n{1}\n'.format(name,PV))
#/*-----------------------------------------------------------------*/
#/* main program */
#/*-----------------------------------------------------------------*/
if __name__ == '__main__':
args = sys.argv
if (len(sys.argv)<3):
print("Usage : python pycompute.py filename1 filename2 ... filenamen juliandate")
print(" filename? : binary or spice ephemeris file names")
print(" juliandate : julian date (floating-point number)")
print("")
print("e.g. : python pycompute.py inpop08a_m100_p100_littleendian.dat 2.451545E+06")
print("e.g. : python pycompute.py de421.bsp masses.tpc 2.451545E+06");
sys.exit(1)
jd0 = float(args[len(sys.argv)-1])
# open the ephemeris file
print(args[1:len(sys.argv)-1])
peph = CalcephBin.open(args[1:len(sys.argv)-1])
#perform the computation
PV = peph.compute_unit(jd0, 0E0, NaifId.EARTH, NaifId.SUN,
Constants.UNIT_AU+Constants.UNIT_DAY+Constants.USE_NAIFID)
print("julian date : {0}".format(jd0))
print("heliocentric coordinates of the Earth in km and km/s")
print("cartesian heliocentric position of the Earth : {0}".format(PV[0:3]))
print("cartesian heliocentric velocity of the Earth : {0}".format(PV[3:6]))
# close the ephemeris file
peph.close()
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