I want to add some more things I have done

1) E0 is kept same for all the shells

2) All other parameters like SO2 , del r , SS2 are calculated separately for different shells.

So. is there problem with taking different SO2  for different shells. Surely del r and SO2 will be different for different shells , If I got it right. 

 

                                                                                                                                                                             

                                                                                                                                                      Abhijeet