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User name Feng
Log entry time 16:20:03 on January 13,1999
Entry number 9401
This entry is a followup to: 9400
keyword=Angle Uncertainty
Actually, Karl thought there is still some intrinsic uncertainty (possibly due to the finite width of the compass needle) in the field orientation, so it's safer to say the angles are 62.5 +/- 0.5 degree and 242.5 +/- 0.5 degree, respectively. We may do some more precise measurement to restrict the uncertainty in the future, if it's ever necessary.