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Lippmann - Model 1-K -High Resolution Platform Tiltmeter
The tiltmeter was used at the Geodetic Base Station Wettzell in SE Germany. In April 2000 a large ring laser has been installed there to observe the rotation of the earth at high resolution. It was necessary to monitor the tilt of the base of the system with extremely high accuracy (in the subnanorad range).
Commercially available borehole tiltmeters have sufficient resolution (of about 1 nrad) – however, due to the large size of those instruments with a length of the order of 1 m such borehole tiltmeters could not be used. Another constraint was a very low power consumption of the tilt sensors, because any temperature change could interfere with the ring laser measurements.
For this purpose a tiltmeter was developed in accordance to the key data probably the tiltmeter with the highest resolution throughout the world at the moment.
Key data
- Resolution: better than 0.5 nrad
- Power: < 30 mW
- Height: < 150 mm