How to open .SP3 file extension?

If you cannot open a new file that has been saved in the .SP3 format you need to download the appropriate software. The manufacturer of .SP3 files is NOAA NGS; .SP3 files belong to the GIS Files category. After downloading the application from the list available on our website just run an unknown file, and as the default set the newly installed application supporting the .SP3 files. Activities performed in the order described should solve the problems with all the files in the .SP3 format.