KPL/MK

EnVision Example Trajectories
================================

VERSION:        2.0
CREATION_DATE:  2019/07/26
ORIGINATOR:     ESA/ESOC (P. Munoz)


CONTENT: Trajectory files in OEM (*.oem) and Spice Kernel (*.bsd) formats
covering the full mission duration for two different scenarios:

  - ESC_T2_2032_SouthVOI: launch into direct escape at -3.0 deg declination
    and Venus Orbit Insertion over the Southern hemisphere.

  - HEO_T2_2032_NorthVOI: launch into HEO (310x100,000 km) and Venus Orbit
    Insertion over the Northern hemisphere.


NOTES:

  - Trajectory data is consistent with planetary ephemeris DE-432.

  - Aerobraking phase is not realistic neither in duration nor in dynamic
    modelling.

  - Science orbit time span (2034/11/26 - 2040/03/24) extended to account for
    the uncertainty in the date of aerobraking finalisation.

  - Venus gravity field expansion to 40x40 degree and order used for
    propagation of the science orbit.


   \begindata

     PATH_VALUES       = ( '../..' )

     PATH_SYMBOLS      = ( 'KERNELS' )

     KERNELS_TO_LOAD   = (

                           '$KERNELS/fk/envision_v00.tf'
                           '$KERNELS/fk/envision_sc_venus_npo_v00.tf'
                           '$KERNELS/fk/estrack_v04.tf'
                           '$KERNELS/fk/earth_topo_050714.tf'
                           '$KERNELS/fk/earthfixeditrf93.tf'

                           '$KERNELS/lsk/naif0012.tls'

                           '$KERNELS/pck/pck00010.tpc'
                           '$KERNELS/pck/de-403-masses.tpc'
                           '$KERNELS/pck/earth_200101_990628_predict.bpc'

                           '$KERNELS/spk/de432s.bsp'
                           '$KERNELS/spk/EnVision_ESC_T4_2032_NorthVOI.bsp'
                           '$KERNELS/spk/estrack_v04.bsp'
                           '$KERNELS/spk/earthstns_itrf93_050714.bsp'

                         )

   \begintext