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Lagrange navigation constellations for seamless coverage of moon space, and construction method thereof

A technology of space seamlessness, navigation star, applied in the field of physics

Inactive Publication Date: 2016-04-13
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the existing satellite navigation system can realize real-time, high-precision, and all-round navigation for near-earth targets, there are still unavoidable deficiencies in its coverage characteristics and navigation performance for deep space users.

Method used

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  • Lagrange navigation constellations for seamless coverage of moon space, and construction method thereof
  • Lagrange navigation constellations for seamless coverage of moon space, and construction method thereof
  • Lagrange navigation constellations for seamless coverage of moon space, and construction method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] Example 1: Constructing a Lagrangian Samsung Navigation Constellation that seamlessly covers lunar space

[0069] 1. Calculate the orbit around the moon in the coordinate system of the centroid of the earth-moon system around the moon

[0070] For a circumlunar orbit with a given orbital radius range and orbital inclination angle range, calculate its circumlunar surface in the Earth-Moon system centroid rendezvous coordinate system, so as to obtain the required coverage area.

[0071] In the process of constructing the Samsung Navigation Constellation, we use the following dimensionless unit system:

[0072] [ M ] = m 1 + m 2 , [ L ] = P 1 P 2 , [ T ] = ...

Embodiment 2

[0128] Example 2: Constructing a Lagrangian four-star navigation constellation that seamlessly covers lunar space

[0129] Although the earth-moon system L 2,4,5 The Samsung navigation constellation has been able to achieve continuous full coverage of orbits around the moon with various inclinations, but the image 3 It can be seen from the specific coverage area shown that the three-star navigation constellation can only achieve multi-satellite coverage on a small area on the spherical surface of the lunar orbit. From the perspective of system robustness and stability, this is not a satisfactory performance indicator.

[0130] Therefore, we are at the Earth-Moon system translation point L 1 A Lagrangian navigation satellite is added nearby, thus forming the L 1,2,4,5 Four star navigation constellation.

[0131] 1. Calculate the orbit around the moon in the coordinate system of the centroid of the earth-moon system around the moon

[0132] For a circumlunar orbit with a gi...

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Abstract

The invention discloses two Lagrange navigation constellations and a construction method thereof. One of the two navigation constellations is formed by three Lagrange navigation stars, the three Lagrange navigation stars are respectively positioned in three period orbits, and the three period orbits comprise a first period orbit constructed nearby an earth-moon system translation point L2, a second period orbit constructed nearby an earth-moon system translation point L4 and a third period orbit constructed nearby an earth-moon system translation point L5; and the other one of the two navigation constellations is formed by four Lagrange navigation stars, the four Lagrange navigation stars are respectively positioned in four period orbits, and the four period orbits comprise the above three period orbits, and also comprise a fourth period orbit constructed nearby the earth-moon system translation point L1. The two Lagrange navigation constellations can realize seamless coverage of the moon space in order to provide continuous navigation information for a moon detector.

Description

technical field [0001] The invention relates to two kinds of navigation constellations and construction methods thereof, in particular to two kinds of Lagrangian navigation constellations seamlessly covering lunar space and construction methods thereof, and belongs to the field of physics. Background technique [0002] With the increasing heating of deep space exploration activities in the world, the user objects of satellite navigation have also begun to further expand to deep space targets. Although the existing satellite navigation system can realize real-time, high-precision, and all-round navigation for near-earth targets, there are still unavoidable deficiencies in its coverage characteristics and navigation performance for deep space users. In order to meet the navigation needs of deep space exploration missions, a series of new satellite navigation systems and autonomous navigation technologies have emerged, such as: lunar GPS navigation system, autonomous astronomic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C21/24G01C21/20
CPCG01C21/20G01C21/24
Inventor 高有涛徐波周建华张磊陈刘成李敏范建军
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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