=============================================================================   
Rosetta FK Files                                                                
=============================================================================   
                                                                                
                                                                                
  This "aareadme.txt" file describes the contents of the KERNELS/FK directory   
  of the ROSETTA SPICE data server. It also provides the file naming            
  conventions used for the ROSETTA FK kernels, and it provides identification   
  of the most current version of each kind of FK file.                          
                                                                                
  All these FK files are produced manually  with the information supplied by    
  Rosetta teams describing the frames for the spacecraft and its science        
  instruments. Some of these FK files (for tracking stations) are provided      
  specifically for the Radio Science investigation.                             
                                                                                
  All FK files (*.TF) contained in this directory are unix text                 
  files. These may be used in a non-compatible text environment by using the    
  ASCII mode of FTP to port the files. [Ref 2a]                                 
                                                                                
  Contact Jose Luis Vazquez-Garcia (jlvazquez@sciops.esa.int) or Dave Heather   
  (dheather@rssd.esa.int) if you have any questions.                            
                                                                                
=============================================================================   
References                                                                      
=============================================================================   
                                                                                
  1. Frames Required Reading. NAIF Document available at                        
     http://naif.jpl.nasa.gov                                                   
                                                                                
  2. NAIF IDs Required Reading. NAIF Document available at                      
     http://naif.jpl.nasa.gov                                                   
                                                                                
=============================================================================   
Rosetta FK Directory Structure                                                  
=============================================================================   
  aareadme.txt        Text file describing the directory structure, the naming  
                      conventions for the FK, and the current version(s) of     
                      each FK type.                                             
                                                                                
  former_versions     Subdirectory that contains obsolete versions of the FK    
                      files that have been updated in the Current FK Kernel     
                      Set.                                                      
                                                                                
=============================================================================   
Rosetta Frame Kernel Naming Convention                         ROS_Vxx.TF       
=============================================================================   
                                                                                
      token           description                                               
      ---------       -------------------------------------------------------   
      xx              Version Number                                            
                                                                                
=============================================================================   
DSN Stations Frame Kernel Naming Convention             EARTH_TOPO_yymmdd.TF    
=============================================================================   
                                                                                
      token           description                                               
      ---------       -------------------------------------------------------   
      yymmdd          Release date.                                             
                                                                                
                                                                                
=============================================================================   
ESA Generic Frame Definition Kernel Naming Convention            RSSDxxxx.TF    
=============================================================================   
                                                                                
       token        description                                                 
       ---------    -------------------------------------------------------     
       xxxx         Version number. This is the standard naming convention      
                    for ESA generic frame definitions kernel.                   
                                                                                
                                                                                
=============================================================================   
Current FK Kernels Set                                                          
=============================================================================   
                                                                                
  Name                     Comments                                             
  ------------------       ------------------------------------------------------
  EARTH_TOPO_yymmdd.TF      FK kernel for the topocentric reference frames for  
                            the Deep Space Network (DSN) stations. This kernel was
                            released on yy-mm-dd.                               
                                                                                
  EARTHFIXEDIAU.TF          This kernel makes the IAU_EARTH frame coincide with 
                            the earth fixed reference frame.                    
                                                                                
  EARTHFIXEDITRF93.TF       This kernel makes the ITRF93 frame coincide with the
                            earth fixed reference frame.                        
                                                                                
  ESTRACK_Vvv.TF            This kernel defines a topocentric reference frame for
                            each of the ESA ESTRACK ground stations.            
                                                                                
  NEW_NORCIA_TOPO.TF        FK kernel for the topocentric reference frame for the
                            ESA 35m tracking antenna at New Norcia.             
                                                                                
  ROS_CGS_AUX_Vvv.TF        Auxiliary frames needed for ROVIZ internal computations.
                                                                                
  ROS_Vxx.TF                FK containing the complete set of frame definitions 
                            for the Rosetta Spacecraft (ROS) and Rosetta Lander 
                            (ROS_LANDER) including definitions for the Rosetta 
                            spacecraft and Rosetta science instrument frames and 
                            Rosetta Lander fixed, Rosetta Lander instrument, and 
                            landing site local frames.                          
                            This kernel also contains NAIF ID/name mapping for the
                            Rosetta instruments and targets (asteroids and comet).
                                                                                
  RSSDvvvv.TF               FK kernel defining a number of mission independent  
                            frames that could be used by any of the users of any
                            of the ESA planetary missions and that are not      
                            ''built'' in the SPICE toolkit.                     
                                                                                
  ROS_LUTETIA_RSOC_Vvv.TF   FK that contains the definition of a body-fixed frame
                            for Lutetia, whose primary meridian is chosen to contain
                            a given feature on the surface of the asteroid, and its
                            Z axis is its rotational axis.                      
                                                                                
  ROS_CHURYUMOV_Vvv.TF      FK and SCLK kernel that provide the definition of the
                            67P/C-G_CK comet frame. Please note that this frame 
                            is to be used with a CATT file providing orientation
                            for the aforementioned frame.                       
                                                                                
                                                                                
                                                                                
                                                                                
-------------------                                                             
                                                                                
        This file was last modified on Sep. 9, 2014 (J. Vazquez)