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Spaceborne laser altimeter in-orbit moon elevation detection uncertainty evaluation method

A technology of laser altimeter and certainty, which is applied in the direction of measuring devices and instruments, and can solve problems that have not yet been systematically studied.

Inactive Publication Date: 2012-08-22
SOUTHEAST UNIV
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  • Abstract
  • Description
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Problems solved by technology

These studies mainly focus on how to use various measurement data to control and support the flight orbit of lunar satellites. However, no systematic and in-depth research has been conducted on the errors in the on-orbit measurement data and their reuse technologies.

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  • Spaceborne laser altimeter in-orbit moon elevation detection uncertainty evaluation method
  • Spaceborne laser altimeter in-orbit moon elevation detection uncertainty evaluation method
  • Spaceborne laser altimeter in-orbit moon elevation detection uncertainty evaluation method

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Embodiment Construction

[0048] The present invention will be further described below in conjunction with accompanying drawing:

[0049] A method for evaluating the uncertainty of on-orbit lunar elevation detection by a spaceborne laser altimeter, characterized in that the specific steps are as follows:

[0050] Obtaining laser altimeter elevation data: The trajectory of my country's Chang'e-1 satellite is a polar lunar orbit, and the trajectory is a circle around the moon. The laser altimeter on board samples one elevation point data every second. The scientific exploration data of the laser altimeter during the lunar exploration of Chang'e-1 totaled 1,400 tracks, forming 1,400 orbital files. The orbital file information includes the elevation sampling time of the laser altimeter. , The lunar longitude, latitude, and elevation data information of the sampling point.

[0051] Step 1: Select the area where the topography of the lunar surface changes flatly from the laser altimeter full lunar elevation...

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Abstract

The invention discloses a spaceborne laser altimeter in-orbit moon elevation detection uncertainty evaluation method which comprises the following steps of: screening an area of which the terrain change is flat from a laser altimeter moon surface elevation detection full-moon area; eliminating a pseudo elevation and calculating the area elevation mean value and the standard deviation in the screened area; analyzing various uncertainty influence factors influencing the elevation detection and the distribution density; and carrying out laser altimeter in-orbit moon elevation detection uncertainty evaluation in combination with the various influence factors and by utilizing the ''Monte Carlo Method for Evaluation of Measurement Uncertainty''specification and giving the elevation results. The method has the advantage that the elevation detection uncertainty can be given to the spaceborne laser altimeter in-orbit moon surface terrain elevation detection according to the selected area to provide a basis for further analyzing the source of laser altimeter measurement error and provide a reference and a basis for making a high-precision moon digital elevation map.

Description

technical field [0001] The invention relates to a method for evaluating uncertainty of on-orbit lunar elevation detection by a spaceborne laser altimeter, in particular to a method for evaluating uncertainty of on-orbit lunar elevation detection by a laser altimeter carried by CE-1. Background technique [0002] The successful launch and operation of the "Chang'e-1" lunar exploration satellite is my country's first exploration of the lunar space environment within 400,000 kilometers from the earth. The earth-moon space environment will be an important place for our country to carry out space activities in the future, and in this space region, there are strong activities such as cosmic rays, solar flares and coronal mass ejections, which are often accompanied by huge space radiation energy and high-energy Sudden release of particles. It is precisely because the "Chang'e-1" lunar exploration satellite works in the above-mentioned relatively harsh space environment, the uncert...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C25/00
Inventor 宋爱国王东霞李会军温秀兰
Owner SOUTHEAST UNIV
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