M1=I1
M2=I1-I2
M3=I1-I2+I3
I1=M1
I2=M1-M2
I3=M3-M2
O1 = M1 + A0 + A1*I2 + A2*X + A3*T
O2 = M2 + B0 + B1*I2 + B2*X + B3*T
O3 = M3 + C0 + C1*I3 + C2*X + C3*T
A3=0. m:r,i,v
B3=0. i:R,R-I,V-I
C3=0.
A0 =    1.5862    0.0029 <<   21.6   2  3.29 ave 3 nights 11/01 1.5m
B0 =    2.4452    0.0029 <<   14.6   2  2.70
C0 =    1.6359    0.0029 <<    7.7   2  1.96
A1 =   -0.0085    0.0053 <<    0.8   2  0.64
B1 =   -0.0166    0.0060 <<    2.1   2  1.02
C1 =   -0.0266    0.0037 <<    4.7   2  1.54
A2 =    0.0902    0.0062 <<    0.2   1  0.39
B2 =    0.0587    0.0075 <<    1.7   1  1.29
C2 =    0.1300    0.0082 <<    0.1   1  0.26
S1 =   0.006                 << n1,n2,n3
S2 =   0.0000160             << n1,n2,n3
S3 =   0.0000092             << n1,n2,n3