In the previous data I only use one cut which is vertex ranking>0 and no vertex cuts.
With Elke's comment, I add the cut |z|<10 cm, which cuts out the tails of both east and west sides

With Akio's new code to calculate the BBS ADC Sum value, it seems two methods agree to each ohter, ecxept the peak of the plot.
But for these are not so many MuDst files storaged, I only get a very samll sample of MuDst files.