Python RINEX 2 / 3 NAV / OBS / sp3 reader & batch convert to HDF5 with C-like speed
FIxed numerous bugs, including xarray API update
Requires Python 3.8+ as Python 3.7 library support and wheel availability is dwindling.
also fix sp3 bug in reading microseconds
multiple fixes to handle RINEX oddities
Requires Python >= 3.7 due to enhanced type annotation
also use entry_points instead of scripts
Thanks to @fmeynadier for adding sp3-d format to Georinex.
thanks @nmayorov #47