At the previous ICRC, Kruger et al. 2005, Proc. 29th ICRC, Pune, 2, 473, and 2,
477, reported on the first tests of two newly constructed calibration neutron
monitors. These monitors are designed to provide an intercalibration between the 50-
odd neutron monitors around the world, so that rigidity spectra can be calculated
from them. In those papers we described the difference in the latitu
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