News

Novel primary standard for measuring long distances

TeleYAG interferometric measurement head mounted on a geodetic pillar – Courtesy of PTB

PTB develops primary standard capable of measuring distances up to 1 km with sub-millimetre accuracy

As part of EMRP project Metrology for long distance surveying (SIB60 Surveying), a novel primary standard for the calibration of geodetic reference baselines was developed by PTB. The TeleYAG system is capable of measuring distances up to 1 km optically with sub-millimetre accuracy. Aside from a measurement of humidity, the device does not require information from auxiliary sensor systems like a temperature sensor network. 

The device was successfully demonstrated in a verification experiment performed at one of the best reference baselines in Nummela, Finland. The device offers, for the first time, high-accuracy traceability to the SI definition of the metre for the most common verification approach used by surveyors worldwide.

Select your area of interest
International Day of Women and Girls in Science
2017-02-10

United Nations declared 11 February International Day of Women and Girls in Science. EURAMET is happy to have many highly-committed people in its comm... more

New facility for nanoscale electronic devices in the RF frequency
2017-01-31

VNA measurement system enables high-frequency measurements for nanoscale planar electronic devices more

Page 1 of 88.