General information about SPICE I-kernels
=========================================

   In the SPICE system, I-kernels contains instrument parameters such
   as field-of-view size, shape, and orientation, timing information,
   detector and filter attributes, etc.

   The data contained in I-kernel files can be accessed and manipulated
   by subroutines which are part of the SPICE library, the major
   component of the SPICE Toolkit. The SPICE subroutines can be
   integrated into user application programs. For information on the
   SPICE Toolkit and/or how to obtain it, please consult SPICE_INST.CAT
   and SOFT.CAT.

   Refer to the KERNEL.REQ document provided with the Toolkit to get
   more information on how to access I-kernel data.


Venus Express IK Files                                                        
======================                                                        
                                                                              
   This file describes the contents of the DATA/IK directory of the Venus     
   Express SPICE data set.
                                                                              
   All these IK files are produced manually with the information supplied by  
   Venus Express teams describing the science instruments.                    

   All IK files (*.TI) contained in this directory are UNIX text files
   with lines terminated by <LF> only.


Venus Express I-Kernels Contained in this Data Set                            
==================================================                            
                                                                              
   The following I-kernels are provided in this data set (vv refers to the    
   version of the kernel):                                                    
                                                                              
       VEX_ASPERA4_Vvv.TI  ASPERA instrument kernel, containing instrument
                           parameters for ASPERA.

       VEX_PFS_Vvv.TI      PFS instrument kernel, containing instrument
                           parameters for PFS.

       VEX_SOIR_Vvv.TI     SOIR instrument kernel, containing instrument
                           parameters for SOIR.

       VEX_SPICAV_Vvv.TI   SPICAV instrument kernel, containing instrument
                           parameters for SPICAV.

       VEX_VIRTIS_Vvv.TI   VIRTIS instrument kernel, containing instrument
                           parameters for VIRTIS.

       VEX_VMC_Vvv.TI      VMC instrument kernel, containing instrument
                           parameters for VMC.
                                                                              

   In the case that several versions of the same instrument kernel are
   provided, the most recent one supersedes the other versions.               
                                                                              

Kernel File Details
===================

   The most detailed description of the data in an IK file is provided
   in metadata included inside the description area of the file. This
   information can be viewed using any text editor program.

   At least a basic knowledge of the SPICE system is needed in order to
   use these kernels. The SPICE Toolkit provides versions in Fortran
   (SPICELIB), C (CSPICE), IDL (Icy), Matlab (Mice), and Java
   (JNISpice) and the user can choose any one that suits him/her.

   The SPICE routine FURNSH can be used to load a kernel file into a
   SPICE-based application to make kernel data usable with SPICE
   APIs.

   If two (or more) text kernels assign value(s) using the '=' operator
   to identical keywords, the data value(s) associated with the last
   loaded occurrence of the keyword are used -all earlier values have
   been replaced with the last loaded value(s).