The paper tells the reader things like seismology, laser source, high precision metrology, vector direction, source, beam direction, laser beam direction, network, stabilization, highly extended coordinate, physical installations, waves, laser, and monitoring. Inside the paper we can find description related to seismic noise, laser sensor, angle component, angle, development, component, temperature, detector, continuous recording, period, oscillations, laser beam, and laser reference.
Lots of info around elements, slope, data, high precision, gravity, earth surface, calorimeter, slope angle, noise, device, measurements, beam, photoreceiver, and calibration slope are presented in the paper. These are some excerpt from this paper:
A principally new method of the measurement of a seismic slope of the Earth surface is suggested. The method makes it possible to stabilize the position of the laser beam as a highly extended coordinate axis in the metrological support of the precision construction of large-scale physical installations. The method has been tested experimentally: for the ˇrst time, low-frequency periodic angular oscillations have been registered with an amplitude of 5 · 10−7 rad and the noise registration value of 2.5 · 10−8 rad. The measurements were taken at CERN, during the construction of the spectrometric complex ATLAS.
Furthermore, this paper presents more things like construction, angular component, registration, metrological support, calibration, seismic oscillations, gravity vector, stability, precision, direction, standing, sensor, and method.