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# A.10 x2sys: Track crossover error estimation

This package contains the tools x2sys_datalist, which allows you to extract data from almost any binary or ASCII data file, and x2sys_cross which determines crossover locations and errors generated by one or several geospatial tracks. It is a new generation of tools intended to replace the old ``X_SYSTEM'' crossover tools (below). The package is maintained by Paul Wessel.