Milbank Project 6133B For the mag file: Resmag for lines 370, 450, 470, T2010 and T2030 was recalculated. In the part on each line where there was significant amplitude the resmag had been smoothed and made to be a high where the totmag was low. Therefore, the calculated IGRF appeared to fluxuate significantly. The recalculation resulted in a resmag that looks like the totmag and the calculated IGRF is now linear. No efforts were made to adjust the totmag but, let it be noted, the totmag does need adjusting in the high amplitude areas of the above lines and the resmag recalculated when the adjustment is made. No changes were made in the resmag in the rad file.