This regex patterns allows to parse rinex 2 filesnames/filepath it follows the directory structure usually found on FTP servers from main GNSS CORS stations networks / monitoring organizations (e.g. ftp://rgpdata.ign.fr/pub/data)

ndsd.log

Source: https://stackoverflow.com/questions/27019696/regex-to-match-specific-functions-and-their-arguments-in-files

lookahead

Wyciąga treść z nagłówków h2.

this should cover all USA cities with special characters as per https://en.wikipedia.org/wiki/List_of_U.S._cities_with_diacritics