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    Make New Entry, Make Followup Entry

    User name Yi Qiang

    Log entry time 14:22:39 on June 17, 2009

    Entry number 281903

    Followups:

    keyword=Current Settings for Compass survey ( a very tiny little change in one last digit )

    BigBite ON: 518A

= 0 degrees =
Small Coil: -5.608
Large Coil: -4.534
Vertical Coil: 0.168

= 45 degrees =
Small Coil: -0.952
Large Coil: -7.313
Vertical Coil: 0.168

= 90 degrees =
Small Coil: 4.285
Large Coil: -5.932
Vertical Coil: 0.168

= 135 degrees =
Small Coil: 7.032
Large Coil: -1.207
Vertical Coil: 0.168

= 180 degrees =
Small Coil: 5.659
Large Coil: 4.097
Vertical Coil: 0.168

= 225 degrees =
Small Coil: 1.006
Large Coil: 6.875
Vertical Coil: 0.168

= 270 degrees =
Small Coil: -4.234
Large Coil: 5.507
Vertical Coil: 0.168

= 315 degrees =
Small Coil: -6.966
Large Coil: 0.773
Vertical Coil: 0.168

=== Current/Field Coefficients ===

float32 K = 0.54998;
float32 EBB = -0.168184;
float32 W = -0.11322;

float32 R = 0.987111;
float32 ag = -0.0268564;
float32 gamma = -0.021912;

float32 bd = 0.216491;
float32 delta = 0.13428;

I_s = B_s/Scale - (ag-gamma) - gamma*I_BB;
I_l = B_l/R/Scale - (bd-delta) - delta*I_BB;
I_v = B_v/K/Scale - (EBB-W) - W*I_BB;

float32 s=Theta*pi/180;
Z=cos(s)*z+sin(s)*x;
X=-sin(s)*z+cos(s)*x;

s = -37.0508 degrees

Scale = -3.537