News

Novel primary standard for measuring long distances

TeleYAG interferometric measurement head mounted on a geodetic pillar

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
Paper describing work of Large Volume Metrology EMPIR project wins outstanding paper award
2024-03-27

Improving large-scale dimensional measurements for manufacturing more

EMPIR project publishes good practice guide to aid uptake of standards related to waveguides
2024-03-25

From 2012 to 2016 the IEEE published standards for high-frequency waveguides. EMPIR NeWITT project supports their uptake more

EMPIR project publishes freely available appearance measurement training videos on YouTube
2024-03-21

The videos regarding the metrology of appearance cover a variety of topics and will help increase photometry and radiometry expertise across National ... more

EMPIR project leads publication of first ISO measurement standard on graphene
2024-03-19

Graphene could revolutionise many technology sectors but needs standardisation more

BIPM initiative: Young Metrologists’ 2050+ Vision
2024-03-18

Take part in EURAMET workshop and BIPM survey! more

Page 1 of 225.