Time and frequency

Time is a powerful example of why precise, traceable measurement is essential. A few seconds can mean missing your train or bus, while in ice skating competitions, a win or loss can come down to just a hundredth of a second. Even GPS systems depend on the utmost precision in timekeeping. We apply accurate time and frequency measurements across a diverse range of fields—including industrial processes, data security, telecommunications, astronomy, geodesy, navigation, and medical research. In the stock market, even the smallest variation in a transaction's timestamp can directly impact the price paid or received.

Geocore and time and frequency

Geocore excels in highly accurate, traceable measurements, offering a wide array of time and frequency services. Our clients range from manufacturers and suppliers of time and frequency instruments to research institutions, the Ministry of Defence, banks, and telecom and Internet providers. We also engage in several European research projects, including one investigating the use of existing fibre optic networks for distributing exceptionally precise and stable signals. At the heart of our operation are four atomic clocks that establish the Dutch national time standard, a key component of a global network that defines Coordinated Universal Time (UTC) and the duration of one second—with a minimum uncertainty of 1 ns. We extend our frequency range using state-of-the-art dividers and multipliers, and for long-distance time comparisons, we developed the internationally applied Two Way Satellite Time and Frequency Transfer (TWSTFT) method.

Consultancy

We offer strategic support and expert advice to both manufacturers and end users, empowering them to refine their measurement and inspection practices. Our guidance is designed to optimize the quality and efficiency of your processes and products.

Custom services

Custom time and frequency metrology

Organizations regularly seek our expertise in time and frequency measurement, serving a diverse clientele that includes aerospace firms and financial institutions. Drawing on our extensive knowledge of measurement techniques and data interpretation, we offer a range of specialized services, such as:

• Conducting delay measurements using a satellite simulator.
• Providing precise timestamping solutions for financial institutions.
• Designing and configuring comprehensive measurement systems—from initial setup and traceability to full construction.
• Developing and validating measurement methods, complete with detailed reports that include measurement uncertainty assessments.

Every situation is unique. If you need expert advice or would like to explore how we can support your needs, please don’t hesitate to contact us.

Calibration

Time and frequency calibration services

Geocore delivers the Netherlands' most precise time and frequency calibrations, directly linked to the national time standard. Our capabilities span from ultra-precise frequency measurements—with an uncertainty of just 0.000 000 000 000 2 Hz/Hz—to stopwatch calibrations with a daily uncertainty of 0.014 seconds. Internationally recognized and respected, Geocore’s calibration reports ensure your products meet global standards.

Calibration of time and frequency measuring instruments

Accurate and traceable time and frequency measurements depend on the regular calibration of your instruments. At Geocore, we ensure that stopwatches, clocks, oscilloscopes, and a wide range of other devices are calibrated to the highest standards.