Global Navigation Satellite Systems Engineering, Policy, and Design
Through recent test results, Satellite Time and Location (STL) from Satelles, a globally available alternative PNT service from low Earth orbit (LEO), has again proven to be a reliable timing source.
By Inside GNSS
Through a collaborative agreement, Satelles will provide its Satellite Time and Location (STL) PNT service to the U.S. National Institute of Standards and Technology (NIST), expanding precision timing distribution options for critical infrastructure.
By Renee Knight
The basis of all precision positioning and navigation is precision timing. Timing comes first. GPS Time is defined on the basis of a set of atomic clocks orbiting aboard the satellites and on the ground in monitoring stations; similarly for the other GNSS systems.
By Inside GNSS
The deck of a tall ship rolled heavily beneath me as a freshening wind whistled through the rigging. A sextant in one hand and a stop watch in the other, I carefully listened. “Tock, Tock, Tock, Tock… the time is now fourteen hours, fifty-eight minutes, Coordinated Universal Time… Dong.” I clicked the stop watch in preparation for checking and winding the ship’s chronometers and measuring the height of the sun at local apparent noon.
By Inside GNSS
The 27th Annual Workshop on Synchronization and Timing Systems (WSTS), sponsored by NIST and ATIS, will take place June 18-21, 2018 in San Jose, California.
By Stan Goff
