[arts-users] two questions about the use of the single scattering database

[WCS]

Dear All,

   Hello, I have two questions about the use of the single scattering 
database.   

   First, The description of particle size in the Single Scattering 
Database is Dmax,  they are discrete values. So, how to use the Single 
Scattering Database with Atmlab to calculate the scattering characteristics of 
ramdom size?

  Second, if Gammma size distribution is used, so, when calculating the 
particle number density, what is the input “r” refer to? Do I need to convert 
Dmax to equal volume sphere radius or Reff?

  Best wishes!

yours,

Weng Chensi___
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[arts-users] question about the simulation of inhomogeneous cloud

[WCS]

Dear All,

 Hello, sorry to bother you. I have one question about the simulation of 
inhomogeneous cloud using DOIT.   

 There are two demos about scattering in Atmlab, qarts_mcdoit_demo.m and 
qarts_scattering_demo.m.Suppose the cloud is homogeneous, the ice water content 
at the top and the bottom of the cloud is same, scattering properties and 
particle number density are calculated by

C.SCAT_DATA{1} = mie_arts_scat_data( Q.F_GRID, T_grid, rfr_index, theta, r );

C.PND_FIELD{1} = box_pnd_mono_size_1d( alt, iwc, r );


Now if the cloud is inhomogeneous, the altitude isdivided into many grids, 
now I know the radius ‘r’ and ice water content ‘iwc’ at each grid. So, should 
I divide the inhomogeneous cloud into many homogeneous clouds? And how should I 
specify the altitude of the top and bottom of eachhomogeneous cloud?

Best wishes!

yours,

Weng





 





 





 





 





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