You can upload an aerosol phase function file here, which must be in such format:
The first line is the single number of scattering angles NN (integer); Two numbers in each of the next NN lines (angles in degree OR cos(ang), then phase function). Angles should be between 0.0 and 180.0 if in degree or -1.0 and +1.0 if in cos(ang). Here is the code in COART to read the data:

c	...
	open(13, file='phasefunction.dat',status='old')
        read (13,*) nn
        do i=1,nn
          read (13,*) ang(i),phs(i)
        enddo
c	...

Here is a sample file:

    10
      0.0  154.049
      1.00 133.179
      2.00 103.359
      8.00  23.296
     25.00  3.361
     50.00  0.8468
    100.00 0.14908
    150.00 0.24479
    175.00 0.27847
    180.00 0.35043

Of course, usually you need more than 10 angles to resolve an actual phase function, but please keep it less than 1000 to save computation time.

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