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Method for building universal pulsar-based autonomous navigation measurement model

A technology of measurement model and construction method, applied in navigation, measurement devices, astronomical navigation, etc., can solve problems such as not completely eliminating the influence of solar system Shapiro delay, system error, inappropriate solar system barycenter relative to heliocentric position vector, etc.

Inactive Publication Date: 2015-01-28
NAT TIME SERVICE CENT CHINESE ACAD OF SCI
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Problems solved by technology

The pulsar navigation observation equation established based on the Sheikh model improperly introduces the position vector of the barycenter of the solar system relative to the heliocentric, does not completely eliminate the influence of the Shapiro delay of the solar system, and does not include the first-order Doppler delay caused by the motion velocity of the pulsar relative to the barycenter of the solar system , there is no orbital motion delay correction problem involving pulsar binaries
In addition, the Sheikh model is inconsistent with the pulsar timing model used in the radio timing observations to establish the pulsar ephemeris (rotation model parameters and astrometric parameters), and will artificially introduce systematic errors in actual navigation applications

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  • Method for building universal pulsar-based autonomous navigation measurement model
  • Method for building universal pulsar-based autonomous navigation measurement model
  • Method for building universal pulsar-based autonomous navigation measurement model

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[0022] The present invention will be further described below in conjunction with the examples, and the present invention includes but not limited to the following examples.

[0023] The universal pulsar autonomous navigation measurement model refers to the measurement model for autonomous navigation of various space vehicles based on X-ray pulsar single and double stars. The pulsar navigation measurement model is a theoretical model describing the relationship between the measured pulsar pulse arrival time (TOA) and the pulsar pulse emission time. When constructing the pulsar navigation measurement model, we decompose it into the vacuum geometric delay of the pulsar pulse signal (for the X-ray band, the medium dispersion delay can be ignored), the physical delay and the conversion calculation of the reference coordinate system. For the calculation of the three, the analytic expressions and algorithms are given respectively, and the precision better than 1ns can be achieved the...

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Abstract

The invention provides a method for building a universal pulsar-based autonomous navigation measurement model. The method comprises calculating the geometric delay of a pulsar pulse signal, the physical delay of the signal, time coordinate transformation correction and double-star orbital motion delay, respectively, and then building the universal pulsar-based autonomous navigation measurement model and a pulsar-based autonomous navigation observation equation. According to the method for building the universal pulsar-based autonomous navigation measurement model, a brand-new pulsar-based navigation measurement model is provided, which is capable of theoretically reaching the calculation accuracy of 1ns; and meanwhile, the space motion velocity of the pulsar and the time delay effect of the impulsion double-star orbital motion are taken into account.

Description

technical field [0001] The invention relates to a pulsar autonomous navigation measurement model, which is applicable to the field of autonomous navigation of various space vehicles based on pulsars. Background technique [0002] The rotation period of a pulsar is very stable, and its rotation parameters and astrometric parameters can be determined with high precision. A group of pulsars distributed in all directions in space, whose spatial position coordinates and rotation models have been accurately measured constitute an inertial space-time reference frame, which can be used for autonomous navigation of various aircraft. The basis of pulsar autonomous navigation is to construct a high-precision pulsar navigation measurement model and pulsar observation equation. At present, in the published literature on pulsar autonomous navigation, the measurement model of pulsar navigation basically follows the model of Dr. Sheikh (see Sheikh S I. The Use of Variable Celestial X Ray S...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C21/02
CPCG01C21/025
Inventor 杨廷高高玉平
Owner NAT TIME SERVICE CENT CHINESE ACAD OF SCI
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