KPL/FK

   This placeholder FK contains updated definitions for RPWS electric
   antennae and for some supporting frames based on the information
   provided by Baptiste Cecconi, OBSPM, France.
 
   These frames will be integrated into the main CASSINI FK at a later
   time.

   BVS/NAIF, 07/23/18.
 

RPWS Electric Antennae Frames
----------------------------------------------------------

   From Baptiste Cecconi's e-mail from July 20, 2018:

      Here are the calibrated direction and length for the electric
      antennas of Cassini/RPWS/HFR. There are 4 effective antennas
      listed below. The calibrated antenna parameters are provided as a
      direction in spherical coordinate: colatitude (TH) and azimuth
      (PH) in the spacecraft frame

         Antenna Eu:
            TH = 108.300 deg
            PH = 17.0000 deg

         Antenna Ev:
            TH = 107.800 deg
            PH = 163.800 deg

         Antenna Ew:
            TH = 29.3000 deg
            PH = 90.6000 deg

         Antenna Ex:
            TH = 89.3000 deg
            PH = -0.600000 deg

      Antenna Eu, Ev, Ew and Ex are also respectively referred to as
      X+, X-, Z and Dipole in some publications.

 
   Antenna Frame Definitions:
 
           [     ]    [       ]  [        ]  [     ]
           [ ROT ]  = [ -17.0 ]  [ -108.3 ]  [ 0.0 ]
           [     ]    [       ]  [        ]  [     ]
                               Z           Y        X
 
           where [x]  represents the rotation matrix of a given angle x about
                    i
           axis i.
 
           Nominal Frame Definition:
 
           \begindata
 
           FRAME_CASSINI_RPWS_EXPLUS = -82731
           FRAME_-82731_NAME         = 'CASSINI_RPWS_EXPLUS'
           FRAME_-82731_CLASS        = 4
           FRAME_-82731_CLASS_ID     = -82731
           FRAME_-82731_CENTER       = -82
           TKFRAME_-82731_SPEC       = 'ANGLES'
           TKFRAME_-82731_RELATIVE   = 'CASSINI_SC_COORD'
           TKFRAME_-82731_ANGLES     = ( -17.0,  -108.3,     0.0 )
           TKFRAME_-82731_AXES       = (     3,       2,       1 )
           TKFRAME_-82731_UNITS      = 'DEGREES'
 
           \begintext
 
           [     ]    [        ]  [        ]  [     ]
           [ ROT ]  = [ -163.8 ]  [ -107.8 ]  [ 0.0 ]
           [     ]    [        ]  [        ]  [     ]
                                Z           Y        X
 
           where [x]  represents the rotation matrix of a given angle x about
                    i
           axis i.
 
           Nominal Frame Definition:
 
           \begindata
 
           FRAME_CASSINI_RPWS_EXMINUS= -82732
           FRAME_-82732_NAME         = 'CASSINI_RPWS_EXMINUS'
           FRAME_-82732_CLASS        = 4
           FRAME_-82732_CLASS_ID     = -82732
           FRAME_-82732_CENTER       = -82
           TKFRAME_-82732_SPEC       = 'ANGLES'
           TKFRAME_-82732_RELATIVE   = 'CASSINI_SC_COORD'
           TKFRAME_-82732_ANGLES     = (-163.8,  -107.8,     0.0 )
           TKFRAME_-82732_AXES       = (     3,       2,       1 )
           TKFRAME_-82732_UNITS      = 'DEGREES'
 
           \begintext
 
           [     ]    [       ]  [       ]  [     ]
           [ ROT ]  = [ -90.6 ]  [ -29.3 ]  [ 0.0 ]
           [     ]    [       ]  [       ]  [     ]
                               Z          Y        X
 
           where [x]  represents the rotation matrix of a given angle x about
                    i
           axis i.
 
           Nominal Frame Definition:
 
           \begindata
 
           FRAME_CASSINI_RPWS_EZPLUS = -82733
           FRAME_-82733_NAME         = 'CASSINI_RPWS_EZPLUS'
           FRAME_-82733_CLASS        = 4
           FRAME_-82733_CLASS_ID     = -82733
           FRAME_-82733_CENTER       = -82
           TKFRAME_-82733_SPEC       = 'ANGLES'
           TKFRAME_-82733_RELATIVE   = 'CASSINI_SC_COORD'
           TKFRAME_-82733_ANGLES     = ( -90.6,   -29.3,     0.0 )
           TKFRAME_-82733_AXES       = (     3,       2,       1 )
           TKFRAME_-82733_UNITS      = 'DEGREES'
 
           \begintext
 
           [     ]    [       ]  [       ]  [     ]
           [ ROT ]  = [  +0.6 ]  [ -89.3 ]  [ 0.0 ]
           [     ]    [       ]  [       ]  [     ]
                               Z          Y        X
 
           where [x]  represents the rotation matrix of a given angle x about
                    i
           axis i.
 
           Nominal Frame Definition:
 
           \begindata
 
           FRAME_CASSINI_RPWS_EDIPOLE = -82735
           FRAME_-82735_NAME         = 'CASSINI_RPWS_EDIPOLE'
           FRAME_-82735_CLASS        = 4
           FRAME_-82735_CLASS_ID     = -82735
           FRAME_-82735_CENTER       = -82
           TKFRAME_-82735_SPEC       = 'ANGLES'
           TKFRAME_-82735_RELATIVE   = 'CASSINI_SC_COORD'
           TKFRAME_-82735_ANGLES     = (  +0.6,   -89.3,     0.0 )
           TKFRAME_-82735_AXES       = (     3,       2,       1 )
           TKFRAME_-82735_UNITS      = 'DEGREES'
 
           \begintext
 
 
RPWS Supporting Frames
----------------------------------------------------------

   To facilitate computation of and searches on the elevation of a
   target above the CASSINI s/c XZ plane needed for RPWS electric
   antennae data processing, as requested by Baptiste Cecconi in e-mail
   from July 21, 2018, this supplementary frame has its +Z axis aligned
   with the s/c +Y axis and its +X axis aligned with the s/c +X axis.

           [     ]    [       ]  [       ]  [       ]
           [ ROT ]  = [   0.0 ]  [   0.0 ]  [ +90.0 ]
           [     ]    [       ]  [       ]  [       ]
                               Z          Y          X
 
           where [x]  represents the rotation matrix of a given angle x about
                    i
           axis i.
 
           Nominal Frame Definition:
 
           \begindata
 
           FRAME_CASSINI_RPWS_EXZPLANE = -82736
           FRAME_-82736_NAME         = 'CASSINI_RPWS_EXZPLANE'
           FRAME_-82736_CLASS        = 4
           FRAME_-82736_CLASS_ID     = -82736
           FRAME_-82736_CENTER       = -82
           TKFRAME_-82736_SPEC       = 'ANGLES'
           TKFRAME_-82736_RELATIVE   = 'CASSINI_SC_COORD'
           TKFRAME_-82736_ANGLES     = (   0.0,     0.0,   +90.0 )
           TKFRAME_-82736_AXES       = (     3,       2,       1 )
           TKFRAME_-82736_UNITS      = 'DEGREES'
 
           \begintext
     

End of FK.