15  14  13  12  11  10   9   8   7   6   5   4   3   2   1   0
---------------------------------------------------------------
|   |   |   |   |   |   |   |   |    |   |   |   |   |   |   |   |
|    Melting layer altitude #1  |    Melting layer altitude #2   |  Input 3 
|-------------------------------|--------------------------------| 
                                :
                                :
                                :
                        Number of Mlbins/2 
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