 path      MISR path
      somx      SOM X in meters
      somy      SOM Y in meters
   
   the call:
   
      <B>status = MTK_SOMXY_TO_LATLON( path, somx, somy, lat, lon )</B>
   
   returns:
   
      status  0 on success; otherwise failure
      lat     decimal latitude
      lon     decimal longitude
      
-Examples

      ;;
      ;; Set up input parameters
      ;;
      path  = 230
      somx  = 17145920.0
      somy  = 222090.0
      
      <B>status = MTK_SOMXY_TO_LATLON( path, somx, somy, lat, l