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| | Abstract | | In the classical mechanics since the age of Newton, the gravitational potential has been, in a sense, a metaphysical concept that cannot be observed. However, since the advent of general relativity by Einstein, it has come to be the object of physical observation. In other words, the gravitational potential, which differes place to place, has come to be a function of time, namely, the proper time. This means that one can make direct observations of gravity potential field by using clocks, substantially the atomic clocks. With the recent development of the atomic clocks, particularly after the significant proposal of the notion of optical lattice clock by Katori, the precision of the atomic clock has been markedly improved aiming at the frequency stability of 10E-18, which is a quantity that can detect the geopotential difference corresponding to the height difference of about 0.01 m. Under these technical background, the authors report the possibility of constructing the gravity potential meter. The topics will be focused on the potential survey, multi-paths potential measurements, potential tomography, and so on. |
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