snr psuccess 100000 trials r6315, r6330, 
-27.0 0.0      0.011
-26.5 0.007    0.035
-26.0 0.057    0.135
-25.5 0.207    0.326  
-25.0 0.531    0.568
-24.5 0.822    0.836 
-24.0 0.953    0.966
-23.5 0.99423  0.996
-23.0 0.99967  0.99974   302956/303056, 218991/219046