Relativistic geodesy

8th Symposium on Frequency Standards and Metrology 2015

Flury, J.^1

Institut für Erdmessung, Institute of Geodesy, Leibniz Universität Hannover, Schneiderberg 50, Hannover

30167, Germany^1

关键词: Earth's gravity fields;    Frequency transfer;    Gravitational potential;    Gravity measurement;    Laser interferometer;    Long-term perspective;    Optical atomic clocks;    Satellite gravimetries;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/723/1/012051/pdf
DOI  :  10.1088/1742-6596/723/1/012051

来源: IOP

【 摘 要 】

Quantum metrology enables new applications in geodesy, including relativistic geodesy. The recent progress in optical atomic clocks and in long-distance frequency transfer by optical fiber together pave the way for using measurements of the gravitational frequency redshift for geodesy. The remote comparison of frequencies generated by calibrated clocks will allow for a purely relativistic determination of differences in gravitational potential and height between stations on Earth surface (chronometric leveling). The long-term perspective is to tie potential and height differences to atomic standards in order to overcome the weaknesses and inhomogeneity of height systems determined by classical spirit leveling. Complementarily, gravity measurements with atom interferometric setups, and satellite gravimetry with space borne laser interferometers allow for new sensitivities in the measurement of the Earth's gravity field.