KPL/FK
   
   This FK defines three frames supporting three different "flavors" of 
   Lunar L_s calculation.

   The 'LRO_LSO_MOON' frame uses the instanteneous angular momentum of the
   Sun motion as seen from the Moon (the +Z axis of the supporting 'LRO_LSE' 
   frame, also defined in this FK) as the primary vector and the 
   Moon pole (+Z of 'IAU_MOON') as the secondary vector. The longitude of
   the position of the Sun as seen from the Moon in this frame matches the
   L_s value returned by SPICE API LSPCN for the Moon.

   The 'LRO_LSO_EMB' frame uses the instanteneous angular momentum of the
   Sun motion as seen from the Earth-Moon Barycenter (the +Z axis of the 
   supporting 'LRO_EMBSE' frame also defined in this FK) as the primary 
   vector and the Moon pole (+Z of 'IAU_MOON') as the secondary vector.
   The longitude of the position of the Sun as seen from the Moon in
   this frame has periodic oscillations of much lesser magnignitude 
   than the L_s computed by LSPCN for the Moon (consistent with Greg 
   Neumann note/proposal from 2/6/07).

   The 'LRO_LSO_ECLIP' frame uses the ecliptic north pole (the +Z axis 
   of the 'ECLIPJ2000' frame built into the toolkit) as the primary vector
   and the Moon pole (+Z of 'IAU_MOON') as the secondary vector.
   The longitude of the position of the Sun as seen from the Moon in
   this frame also has periodic oscillations of much lesser magnignitude 
   than the L_s computed by LSPCN for the Moon (consistent with Nat 
   Bachman's note from 3/14/07).

   BVS/NAIF, May 22, 2020.  

   \begindata

      FRAME_LRO_LSO_MOON           =  -85910
      FRAME_-85910_NAME            = 'LRO_LSO_MOON'
      FRAME_-85910_CLASS           =  5
      FRAME_-85910_CLASS_ID        =  -85910
      FRAME_-85910_CENTER          =  301
      FRAME_-85910_RELATIVE        = 'J2000'
      FRAME_-85910_DEF_STYLE       = 'PARAMETERIZED'
      FRAME_-85910_FAMILY          = 'TWO-VECTOR'
      FRAME_-85910_PRI_AXIS        = 'Z'
      FRAME_-85910_PRI_VECTOR_DEF  = 'CONSTANT'
      FRAME_-85910_PRI_FRAME       = 'LRO_LSE'
      FRAME_-85910_PRI_SPEC        = 'RECTANGULAR'
      FRAME_-85910_PRI_VECTOR      = ( 0, 0, 1 )
      FRAME_-85910_SEC_AXIS        = 'Y'
      FRAME_-85910_SEC_VECTOR_DEF  = 'CONSTANT'
      FRAME_-85910_SEC_FRAME       = 'IAU_MOON'
      FRAME_-85910_SEC_SPEC        = 'RECTANGULAR'
      FRAME_-85910_SEC_VECTOR      = ( 0, 0, 1 )

      FRAME_LRO_LSE                =  -85911
      FRAME_-85911_NAME            = 'LRO_LSE'
      FRAME_-85911_CLASS           =  5
      FRAME_-85911_CLASS_ID        =  -85911
      FRAME_-85911_CENTER          =  301
      FRAME_-85911_RELATIVE        = 'J2000'
      FRAME_-85911_DEF_STYLE       = 'PARAMETERIZED'
      FRAME_-85911_FAMILY          = 'TWO-VECTOR'
      FRAME_-85911_PRI_AXIS        = 'X'
      FRAME_-85911_PRI_VECTOR_DEF  = 'OBSERVER_TARGET_POSITION'
      FRAME_-85911_PRI_OBSERVER    = 'MOON' 
      FRAME_-85911_PRI_TARGET      = 'SUN'
      FRAME_-85911_PRI_ABCORR      = 'NONE'
      FRAME_-85911_SEC_AXIS        = 'Y'
      FRAME_-85911_SEC_VECTOR_DEF  = 'OBSERVER_TARGET_VELOCITY'
      FRAME_-85911_SEC_OBSERVER    = 'MOON' 
      FRAME_-85911_SEC_TARGET      = 'SUN'
      FRAME_-85911_SEC_ABCORR      = 'NONE'
      FRAME_-85911_SEC_FRAME       = 'J2000'

      FRAME_LRO_LSO_EMB            =  -85912
      FRAME_-85912_NAME            = 'LRO_LSO_EMB'
      FRAME_-85912_CLASS           =  5
      FRAME_-85912_CLASS_ID        =  -85912
      FRAME_-85912_CENTER          =  301
      FRAME_-85912_RELATIVE        = 'J2000'
      FRAME_-85912_DEF_STYLE       = 'PARAMETERIZED'
      FRAME_-85912_FAMILY          = 'TWO-VECTOR'
      FRAME_-85912_PRI_AXIS        = 'Z'
      FRAME_-85912_PRI_VECTOR_DEF  = 'CONSTANT'
      FRAME_-85912_PRI_FRAME       = 'LRO_EMBSE'
      FRAME_-85912_PRI_SPEC        = 'RECTANGULAR'
      FRAME_-85912_PRI_VECTOR      = ( 0, 0, 1 )
      FRAME_-85912_SEC_AXIS        = 'Y'
      FRAME_-85912_SEC_VECTOR_DEF  = 'CONSTANT'
      FRAME_-85912_SEC_FRAME       = 'IAU_MOON'
      FRAME_-85912_SEC_SPEC        = 'RECTANGULAR'
      FRAME_-85912_SEC_VECTOR      = ( 0, 0, 1 )

      FRAME_LRO_EMBSE              =  -85913
      FRAME_-85913_NAME            = 'LRO_EMBSE'
      FRAME_-85913_CLASS           =  5
      FRAME_-85913_CLASS_ID        =  -85913
      FRAME_-85913_CENTER          =  301
      FRAME_-85913_RELATIVE        = 'J2000'
      FRAME_-85913_DEF_STYLE       = 'PARAMETERIZED'
      FRAME_-85913_FAMILY          = 'TWO-VECTOR'
      FRAME_-85913_PRI_AXIS        = 'X'
      FRAME_-85913_PRI_VECTOR_DEF  = 'OBSERVER_TARGET_POSITION'
      FRAME_-85913_PRI_OBSERVER    = 3
      FRAME_-85913_PRI_TARGET      = 'SUN'
      FRAME_-85913_PRI_ABCORR      = 'NONE'
      FRAME_-85913_SEC_AXIS        = 'Y'
      FRAME_-85913_SEC_VECTOR_DEF  = 'OBSERVER_TARGET_VELOCITY'
      FRAME_-85913_SEC_OBSERVER    = 3
      FRAME_-85913_SEC_TARGET      = 'SUN'
      FRAME_-85913_SEC_ABCORR      = 'NONE'
      FRAME_-85913_SEC_FRAME       = 'J2000'

      FRAME_LRO_LSO_ECLIP          =  -85915
      FRAME_-85915_NAME            = 'LRO_LSO_ECLIP'
      FRAME_-85915_CLASS           =  5
      FRAME_-85915_CLASS_ID        =  -85915
      FRAME_-85915_CENTER          =  301
      FRAME_-85915_RELATIVE        = 'J2000'
      FRAME_-85915_DEF_STYLE       = 'PARAMETERIZED'
      FRAME_-85915_FAMILY          = 'TWO-VECTOR'
      FRAME_-85915_PRI_AXIS        = 'Z'
      FRAME_-85915_PRI_VECTOR_DEF  = 'CONSTANT'
      FRAME_-85915_PRI_FRAME       = 'ECLIPJ2000'
      FRAME_-85915_PRI_SPEC        = 'RECTANGULAR'
      FRAME_-85915_PRI_VECTOR      = ( 0, 0, 1 )
      FRAME_-85915_SEC_AXIS        = 'Y'
      FRAME_-85915_SEC_VECTOR_DEF  = 'CONSTANT'
      FRAME_-85915_SEC_FRAME       = 'IAU_MOON'
      FRAME_-85915_SEC_SPEC        = 'RECTANGULAR'
      FRAME_-85915_SEC_VECTOR      = ( 0, 0, 1 )

   \begintext
 
End of FK file.