![]() It can be done on the outside of your belly (external monitoring). ![]() ![]() Fetal monitoring is a very common procedure. This is done by checking the baby’s heart rate and other functions. In pregnancy and during labor, your healthcare provider will want to check the health of your unborn baby (fetus). Physical Review Letters, 1964,13(26):789-791.Fetal Monitoring What is fetal monitoring? Essential relativistic celestial mechanics. ![]() Krisher T P,Morabito D D,Anderson J D.The Galileo solar redshift experiment. Krisher T P,Anderson J D,Campbell J K.Test of the gravitational redshift effect at Saturn. Test of relativistic gravitation with a space-borne hydrogen maser. Vessot R F C,Levine M W,Mattison E M,et al. New tests of the gravitational redshift effect. Cambridge, UK: Cambridge University Press,1993. Will C M.Theory and experiment in gravitational physics. Low-frequency gravitational wave searches using spacecraft doppler tracking. A test of general relativity using radio links with the Cassini spacecraft. JPL Publication 00-7, 2000.īertotti B, Iess L, Tortora P. Formulation for observed and computed values of deep space network data types for navigation: jet propulsion laboratory,national aeronautics and space administration. Beijing: Tsinghua University Press,2005.] We also know that, given the accuracy of measurement and control in China and no additional payload in this method, possible violations of LLI and LPI could be the scientific goals of Chinese measurement and control.Ĭatherine L.深空导航无线电跟踪测量技术.李海涛,译.北京:清华大学出版社,2005. We find that possible violations of LLI and LPI cannot affect two-way Doppler tracking under a linear approximation of LTS, although this approximation is sufficiently good for most cases in the solar system. After taking the finite speed of light into account, which is the so-called light time solution (LTS), we make these models depend on the time of reception of the signal only for practical convenience. Starting from a one-way Doppler model, we extend the theory to two-way and three-way Doppler models by making them include possible violations of the local Lorentz invariance (LLI) and the local position invariance (LPI) in order to test the Einstein equivalence principle, which is the cornerstone of general relativity and all other metric theories of gravity. We also know that, given the accuracy of measurement and control in China and no additional payload in this method, possible violations of LLI and LPI could be the scientific goals of Chinese measurement and control.Ībstract: Currently two-way and three-way spacecraft Doppler tracking techniques are widely used and play important roles in control and navigation of deep space missions. Currently two-way and three-way spacecraft Doppler tracking techniques are widely used and play important roles in control and navigation of deep space missions.
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