Hydrogen maser
Videos
A hydrogen maser, also known as hydrogen frequency standard, is a specific type of maser that uses the intrinsic properties of the hydrogen atom to serve as a precision frequency reference.
An exposed hydrogen maser
A passive hydrogen maser used as a clock in Galileo satellite navigation system
A hydrogen maser used by BeiDou-3
BeiDou
Videos
The BeiDou Navigation Satellite System is a satellite-based radio navigation system owned and operated by the China National Space Administration. It provides geolocation and time information to a BDS
Hydrogen maser
…reduces the cost. An exposed hydrogen maser A passive hydrogen maser used as a clock in Galileo satellite navigation system A hydrogen maser used by BeiDou-3 See also Timeline of hydrogen technologies References Bibliography Bauch, A. (2007). "Atomic frequency standards, properties and applications". In…
Model of BeiDou Phase III satellite orbits
Frequency allocation of GPS, Galileo, and COMPASS; the light red color of E1 band indicates that the transmission in this band has not yet been detected.
Ground track of BeiDou-M5 (2012-050A)