ClockWatch Star Sync is a tool that provides the total solution for enterprise-wide time synchronization over the network, acquires precise time from GPS, NIST, or a dial-up time service and makes the correct time available over the local network using the Network Time Protocol (NTP). The ClockWatch Star Sync can synchronize client computers typically to +/- 0.01 second. By installing the ClockWatch Star Sync within your network firewall, you can ensure high reliability and security in delivering precise time.
The ClockWatch Star Sync derives time from GPS satellites and automatically tracks up to twelve satellites simultaneously. Time derived from the ClockWatch Star Sync is traceable to NIST (National Institute of Standards and Technology).

The license of this software is Free Trial Software, the price is $249.95, you can free download and get a free trial.