Speaker
Description
Recent geopolitical developments have led to severe disruption for crucial systems that society relies on, even for countries that are not part of any ongoing conflict. This includes intentional sabotage of infrastructure or denial of access to critical support systems. Global Navigation Satellite System is one of those systems that society depends on, both in terms of positioning but also for time and frequency . Time and frequency from a GNSS receiver are widely utilized, as receivers are inexpensive and easy to install. A number of the systems that are crucial for society are GNSS dependent in terms of correct and traceable time and frequency. These systems include those critical for the function of energy, communication, security systems as well as health systems for entire countries.
National time is based on the national time scale of each country and can be distributed via various different routes to end users. The main issue with time and frequency is that while it is a key part of critical infrastructure, with society dependent on its correct functioning, the market is not willing to cover the current costs for delivering correct traceable time. Another issue is that the publicly funded National Metrology Institutes (NMIs) that realize the national timescales have limited resources, which results in end users not having access to correct traceable time and frequency, and instead relying on GNSS without redundancy.
To meet current and future needs, research and development must be carried out regarding TF distribution in existing fibre infrastructure, as well as coexistence with communication methods.
Here we present the latest work on traceable national distribution of time and frequency from the Swedish national time scale. The distribution takes place from a number of different locations in Sweden, each location having redundant time scales based on atomic clocks.
| Estimated presentation duration | 35-40 mins |
|---|
