Abstract Information on the Earth’s gravity provides significant strategic support for economies, defense and security. An atomic gravimeter (AG) realizes highly precise measurements of gravitational acceleration by virtue interference. Vibration noise is a strong contributor to limitations measurement sensitivity accuracy an AG. compensation methods thus enhance environmental adaptability AG s...

Atom interferometry offers new perspectives for geophysics and inertial sensing. We present the industrial prototype of a type quantum-based instrument: compact, transportable, differential quantum gravimeter capable measuring simultaneously absolute values both gravitational acceleration, $g$, its vertical gradient, $\Gamma_{zz}$. While sensitivity to g is competitive with best gravimeters, on...

This paper proposes a smartphone-based network real-time kinematic (RTK) positioning and gravity-surveying application (app) that allows semi-real-time measurements using the built-in Bluetooth features of the smartphone and a third-generation or long-term evolution wireless device. The app was implemented on a single smartphone by integrating a global navigation satellite system (GNSS) control...

Conventional explanations for observations of anomalous behaviour of mechanical systems during solar eclipses are critically reviewed. These observations include the work of Allais with paraconical pendula, those of Saxl and Allen with a torsion pendulum and measurements with gravimeters. Attempts of replications of these experiments and recent gravimeter results are discussed and unpublished d...

In the control system of a quantum gravimeter, optical signal containing phase information is weak and usually at nV level. This situation puts forward high requirements for measurement performance system. As coupling input component system, noise level preamplifier has dramatic influence on performance. this paper, current provided by photodiode. According to photodiode output characteristics,...