U.S. Space Command - On this day in January 1980, the GPS epoch — the continuous time system for all satellites and observation systems — started at 00:00:00 Coordinated Universal Time (UTC)
Spectra Precision Epoch 50 GNSS GPS Receiver -guaranteed for sale online | eBay
LSU Center for GeoInformatics - Attention EPOCH 25 and 50 users! We have learned that the EPOCH 50 and possibly other Spectra Precision rovers that are using a CMRx mount point in
Spectra EPOCH 25 GPS System | Xpert Survey Equipment