Inertial navigation system transverse geocentric latitude measurement method

Abstract

The invention belongs to the technical field of inertial navigation system polar region navigation, and specifically relates to a method for an inertial navigation system to measure a transverse geocentric latitude by using latitude and longitude information outputted under a normal mode, such that a conversion of the inertial navigation system from a normal mode to a polar region mode is realized. According to the invention, longitude and geographical latitude of a position of a vessel are obtained according to position data outputted by the inertial navigation system under a normal mode; according to the geographical latitude of the position of the vessel, a geocentric latitude measurement value is determined; and according to the vessel longitude outputted by the inertial navigation system and the geocentric latitude, the transverse geocentric latitude measurement method value is obtained. With the method, a common error caused by that a latitude information outputted by the inertial navigation system is approximated as the geocentric latitude is avoided, and measurement precision of transverse geocentric latitude is improved, such that the error of inertial navigation system mode conversion is reduced. The measuring method provided by the invention is simple and convenient, and is suitable for actual application.

Description

technical field [0001] The invention belongs to the technical field of inertial navigation system polar region navigation, and specifically relates to a method for measuring the transverse geocentric latitude by using the longitude and latitude information output in the normal mode by the inertial navigation system, so as to realize the transverse geocentric latitude conversion of the inertial navigation system from the normal mode to the polar region mode latitude measurement method. Background technique [0002] The polar region has increasingly become an area where major powers compete for interests: First, the polar region is rich in oil and gas resources. According to data from the US Geological Survey, 25% of the world’s undiscovered oil and gas resources are distributed in the polar region, and the cruising of ships in the polar region will increase my country has the right to speak in the development of resources in the polar region; secondly, in terms of strategic ge...

AI Technical Summary

Problems solved by technology

However, there is currently a lack of research on navigation machinery arrangement and related parameter measurement methods under the abscissa reference frame

Images