v2.6 Changes Features: + 20191228 added AACGM-v2 coefficients derived using IGRF13 model. Note that Note that there are some small differences (less than 1 km) added file magmodel_1590-2020.txt which contains GUFM1 and IGRF13 coefficients added additional checks in igrflib.c for reading new coefficients. Note: igrf13coeffs.txt had an additional space at the end of each line that required these additional checks. changed error message in aacgmlib_v2.c for date/time out of bounds Bug fixes: