mean = truth zenith angle - reconstucted zenith angle

North to South

mean =  -0.037519
rms =  0.411626
muons= 
mean =  -0.00646946
rms =  0.417814
anti-muons= 
mean =  -0.0603207
rms =  0.404385

zenith angle < 45 degree 
muons=  
mean =  0.0026637
rms =  0.394633
anti-muons=  
mean =  -0.0679421
rms =  0.376395

zenith angle > 45 degree
muons=  
mean =  -0.00776252
rms =  0.436895
anti-muons=  
mean =  -0.0596581
rms =  0.441081



South to North

mean =  -0.0297986
rms =  0.42488
muons= 
mean =  -0.0779205
rms =  0.415209
anti-muons= 
mean =  0.0121695
rms =  0.427176

zenith angle < 45 degree 
muons=  
mean =  -0.0884657
rms =  0.39284
anti-muons=  
mean =  0.0290514
rms =  0.390882

zenith angle > 45 degree
muons=  
mean =  -0.0659481
rms =  0.442352
anti-muons=  
mean =  0.0116819
rms =  0.435744


:combine one direction of normal B field and the opposite direction of reverse B field 


    +- case   South to North :
 zenith angle < 20 degree 
mean =  -0.280204     width =  0.491012
 20 <= zenith angle < 35 degree 
mean =  -0.199104     width =  0.437877
 35 <= zenith angle < 45 degree 
mean =  -0.154112     width =  0.429513

    +- case   North to South :
 zenith angle < 20 degree 
mean =  0.249009     width =  0.474549
 20 <= zenith angle < 35 degree 
mean =  0.199029     width =  0.460969
 35 <= zenith angle < 45 degree 
mean =  0.155366     width =  0.428534