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Russian Federation : Russian Scientists Are Creating a Mobile Optical Frequency Standard.

The Main Metrological Center of the State Time Service, Frequency and Earth Rotation Parameter Definition (GMC GSVCH) at VNIIFTRI Rosstandart is working on developing a prototype mobile optical frequency standard (MOSCH). Since there are no devices of this class in Russia yet, it can be said that these are optical frequency standards (OFS) of a new generation.

The mobile optical frequency standard will ensure the functioning of the GSVCh activity at a modern technical level, since it will allow prospective comparisons of time scales, said Sergey Golubev, Deputy Head of the Rosstandart.

Today, the most accurate frequency standards are ground-based devices. In the future, refined and improved, such standards can be set aboard space stations. The development of standards with high metrological characteristics opens up new opportunities for the development of global navigation systems, geodesy, gravitational-wave astronomy, as well as for further research in applied and fundamental physics.

Creating a mobile optical frequency standard is an ambitious task for the entire global scientific community in this area. This standard will give a powerful impetus to the development of integrated navigation systems that use not only the signals of spacecraft, but also data on the natural fields of the Earth. The satellite navigation system is not always accurate, since the signal passing from the satellite to the receiver on the ground can be distorted depending on the state of the atmosphere and many other factors. Thanks to the placement of the OFS in space, it will be possible to significantly improve the metrological and functional characteristics of existing navigation systems, said Sergey Donchenko, General Director of VNIIFTRI .

VNIIFTRI conducts continuous work on the modernization and improvement of the existing PLLs. New developments of VNIIFTRI scientists will significantly reduce the size of the standard and keep the characteristics of instability and frequency accuracy at the level of the best stationary installations (about 10-17 - 10-18). Today, the world's leading research centers are developing to create such facilities.

In the future, the space based MOCS will help solve a variety of tasks that are not solvable today. The device will expand the possibilities of exploring the Earth and the gravitational field of the Earth, which will allow detecting seismic activity at an early stage and predicting it, as well as observing changes in the ice cover of the Earth and sea level. High-precision measurements of the gravitational potential of the Earths surface can be a source for drawing up new navigation maps. This will ensure globalization and significantly increase the noise immunity of onboard navigation systems. New opportunities will also be used in fundamental and applied physics, said Vitaly Palchikov, chief researcher of the GMC .

At present, two optical frequency standards for cold strontium atoms have been created and function as part of the GSVCh at VNIIFTRI. The frequency standards developed at the institute participate in comparisons with the frequency standards of the world's leading metrological centers, and in these comparisons they show high characteristics of accuracy and stability.

Comparisons of time standards today occur through the use of fiber-optic communication lines, mobile clocks, through signals from navigation satellites. Mobile optical frequency standards of the new generation can be the most accurate means of comparing time scales and ensure a uniform measurement throughout the world at a higher level.

For reference. The Federal State Unitary Enterprise All-Russian Research Institute of Physico-Technical and Radio Engineering Measurements (FGUP VNIIFTRI) is a subordinate organization of Rosstandard and one of the leading national metrological institutes of Russia. Founded in 1955. It includes the East-Siberian (Irkutsk), Far Eastern (Khabarovsk) and Kamchatka (Petropavlovsk-Kamchatsky) branches. In 1994, VNIIFTRI was assigned and regularly confirmed the status of the State Scientific Center of the Russian Federation.

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Publication:Mena Report
Date:Jun 13, 2019
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