ISRO’s NavIC constellation, for which it has launched 11 satellites since 2013, is in operational distress. Only three satellites remain capable of providing position, navigation, and timing (PNT) ...

IRSO's NavIC system faces challenges as the last atomic clock fails, reducing operational satellites for navigation services.

Physicists at the National Institute of Standards and Technology (NIST) and partners have demonstrated an experimental, next-generation atomic clock—ticking at high "optical" frequencies—that is much ...

The VIAVI® ePRTC360+™ from VIAVI Solutions is a Cesium-less enhanced primary reference time clock designed to meet ITU-T ...

for GSM base stations; and 10.23 MHz for GPS. The clock provides a frequency stability change of ± 5 x10 –11 over the temperature range of –5° to 55°C.

This is a prototype rubidium “atomic clock” developed for Block I Global Positioning System (GPS) satellites about 1974. It dates from the “concept validation phase” of the program, from 1974 through ...

Fourteen laser ranging stations participated in a campaign to track ESA’s GIOVE-A satellite during the spring and summer of 2006, providing invaluable data for the characterisation of the satellite’s ...