Program: MKLSBAZV

  mkbaz.................calculate Back azimuth from coordinates (vectorized)
 
  call: [baz,dist]=mklsbazv(elon,elat,slon,slat); 
 
              elon: list or matrix ofepicenter longitude
              elat: list or matrix of epicenter latitudes
              slon: single station longitude
              slat: single station latitude
 
  all coordinates in degrees, positive to the north and east, respectively.
 
  result: baz: (numeric array) [deg]
               back azimuth
               NaN in cases in which the BAZ is undefined
          dist: (numeric array) [deg]
                epicentral distance
 
   after formula 4.4.3 in Lay/Wallace's book "Modern Global Seismology"
   but completed and improved by MK
 
  Martin Knapmeyer, 10.09.1996, 15.08.2002, 21.08.2002, 02.06.2003, 03.06.2003

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