facF15a := [.735281346869901542*z^2-.153353239102668256e-15*y*z-.1155448828864\
92506*y^2-.193778158356164252e-15*x*z-.540346871486753727e-16*x*y-.25997456809\
9191560*x^2+.250079857008298895e-15*z-.577700188146896848e-16*y+.\
824426854418004492e-17*x+1.03989259846030668, .735321764776882382*z^2-.\
153348281279518441e-15*y*z+.115539885741725412*y^2+.182165300431054087e-14*x*z
-.238414549038013544e-15*x*y+.259966161337428224*x^2+.250071772068517653e-15*z
-.577681511427811690e-16*y+.663988370274137365e-16*x-1.03987031855085421];
t15a := 1.854;
berror15a := .4394062981e-8;