Because each axis is measured independently, no information
is available on the phase relationship between the axes.
Therefore, it is possible that one axis is at a maximum in
its oscillation while another axis is at a minimum.
Consequently, the resultant may be an over estimation of the
actual maximum instantaneous magnetic field as it
oscillates. In the worst case, with circular polarization,
the computed resultant will exceed the actual maximum field
by approximately 40 percent. The lower bound on the instantaneos
maximum field of any particular measurement depends on the
magnitudes along the three axes. The upper bound
is the square root of the sum of the squares of the
components.