131.579*( cos( *0.01745329252 )*sin( (-10)*0.01745329252 ) ) *

( ((1 + sin( *0.01745329252 )*sin( 52*0.01745329252 )
      + cos( *0.01745329252 )*cos( 52*0.01745329252 )*cos( (-10)*0.01745329252 ) ) *0.5)^ -0.5)
   - (-36.388)