Method for measuring polar motion of globe by using gyroscope

Abstract

The invention discloses a method for measuring the polar motion of the globe by using a gyroscope. The method comprises the following steps of: positioning the gyroscope at a known point in a way that a rotating axis of the gyroscope points to the north and deviation is less than 10 degrees; starting the gyroscope to measure meridian seeking torque Malpha0 at the moment and calculate an included angle alpha0 between the rotating axis of the gyroscope and a meridian direction at the moment; starting the gyroscope to measure the meridian seeking torque Mtheta1 at the moment and calculate the latitude theta1 of the position of the gyroscope at the moment by taking the alpha0 as a known value; by taking the latitude theta1 as the known value, starting the gyroscope again to measure the meridian seeking torque Malpha1 and calculate the latitude of the position of the gyroscope at the moment; repeating measuring the meridian seeking torque M and calculating the corresponding alpha and theta like this; then taking the alpha and theta obtained each time as the known values for next calculation for iteration and calculation to obtain alphai and thetai and selecting results (thetam, alpham) and (thetan, alphan) at any two moments to obtain the polar motion of the globe at the moments i=m to i=n. The method of the invention has the advantages of simplicity, practicability, relatively higher independence, high data processing speed and the capacity of monitoring the change of polar motion parameters of the globe in real time.

Description

technical field The invention belongs to the technical fields of geophysics, geodesy and inertial navigation, and in particular relates to a method for measuring the parameters of the earth's pole shift, in particular to a method for measuring the parameters of the earth's pole shift by using a gyroscope. The invention can be widely used in the fields of aviation, spaceflight, global plate movement monitoring, deep space exploration research and the like. Background technique Due to the uneven distribution of the material flow in the earth itself, the position of the earth's rotation axis is constantly changing slightly. This change is called a "pole shift". Accurate measurement of the earth's pole shift has important practical significance and application value for the research of aviation, spaceflight and geophysics. Since the 1970s, people have used a variety of observation techniques to measure the Earth’s pole shift, such as astronomical observation methods, VLBI tec...

AI Technical Summary

Problems solved by technology

Since the 1970s, people have used a variety of observation techniques to measure the Earth’s pole shift, such as astronomical observation methods, VLBI technology, and GPS technology. The cost of equipment is expensive, and the cycle of obtaining observation data is long, and the data post-processing process is complicated

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