Ship-borne dynamic absolute gravity measurement based on cold atom gravimeter
نویسندگان
چکیده
Cold atom gravimeter is gradually developing towards miniaturization, dynamics and practicality. It of great significance to apply it deep far sea absolute gravity measurement underwater long navigation time high-precision navigation. At present, most cold gravimeters are still in the state laboratory static base or quasi-static measurement, which difficult meet needs dynamic application scenarios. Therefore, research on "static dynamic" interferometric very urgent key. In this paper, basic principle analyzed, method combined accelerometer given, a set system based inertial stabilization platform built, ship-borne experiment carried out by using traditional accelerometer. Firstly, continuous for about 40 h environment preliminarily evaluate performance gravimeter. The sensitivity 447 µGal/<inline-formula><tex-math id="M2">\begin{document}$\sqrt {{\text{Hz}}} $\end{document}</tex-math><alternatives><graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="11-20220113_M2.jpg"/><graphic xlink:href="11-20220113_M2.png"/></alternatives></inline-formula>, long-term stability can reach 2.7 µgal. On basis, conducted, survey ship sails lake at speed 4.6 kn, means repeated lines. After evaluation, internal coincidence accuracy four lines 2.272 mGal, external values voyages 2.331, 1.837, 3.988 2.589 mGal respectively. Finally, according experimental results, possible problems further analyzed summarized. This study provides preliminary verification technical scheme reference marine measurement.
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ژورنال
عنوان ژورنال: Chinese Physics
سال: 2022
ISSN: ['1000-3290']
DOI: https://doi.org/10.7498/aps.71.20220113