rtklib version

The base version of rtklib is "2020/12/30 2.4.3 b34". More info about rtklib, please refer to readme.txt. readme.txt is the original rtklib's description. The mast branch is the visual studio 2017 type programs. Clone the branch, and open the rtklib/rtklib.sln with vs2017, then rebuild the program, and debug.

Note:

If you are interested in mul-freq spp, pls change the branch to mulfreq-spp. If you are interested in RTK, please change the branch to rtk.