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Method for measuring latitude and longitude of fire point sensor

A determination method and sensor technology are applied in the field of satellite attitude control to achieve the effect of improving intelligence and improving practicability

Active Publication Date: 2021-12-03
BEIJING INST OF CONTROL ENG
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] The fire point detection sensor is a newly developed sensor. The direct output information of the sensor is the vector position of the fire point in the sensor reference mirror coordinate system, and the fire point position that the user wants to obtain is the geographic longitude and latitude position of the fire point. At present, there is no method for determining the geographic longitude and latitude of the fire point

Method used

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  • Method for measuring latitude and longitude of fire point sensor
  • Method for measuring latitude and longitude of fire point sensor
  • Method for measuring latitude and longitude of fire point sensor

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Embodiment 1

[0052] 1. Known fire sensor installation matrix C throughout the star PBfire =[0,1,0;-1,0,0;0,0,1] and installation position

[0053] 2. When t=1000.125 seconds, the sensor outputs the fire point moment t_fire=1000.125, and the orientation unit vector of the fire point in the reference mirror coordinate system of the sensor is u p =[0.037007109559268 0.0370071095592680.998629534754574] T ;

[0054] 3. Determine the satellite attitude matrix C corresponding to the time t_fire by looking up the table BO_fire =[0.99999999948125828,1.2893420485576845e-005,-2.9516826041131594e-005;-1.2893922240783673e-005,0.99999999977239318,-1.6998827341560552e-005;2.9516606861290651e-005,1.6999207920420645e-005,0.99999999941989848];

[0055] 4. Satellite orbit position at time t_fire [x_fire y_fire z_fire] T =[-4285.8020078297141, 1631.1533849416005, -5124.1037730588559] T and the transformation matrix C of the satellite from the J2000 inertial coordinate system to the satellite orbital co...

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Abstract

The invention provides a method for measuring latitude and longitude of a fire point sensor. The method comprises the following steps: determining an installation matrix and an installation position of a fire point detection sensor on a satellite; obtaining an azimuth vector and a fire point moment of an output fire point of the sensor in a reference mirror coordinate system of the sensor; storing satellite attitude data in the satellite computer, and obtaining satellite attitude information of the time corresponding to the fire point through table look-up; calculating a satellite orbit position at the moment, a conversion matrix of a satellite from a J2000 inertial coordinate system to a satellite orbit coordinate system, an age difference nutation matrix and a Greenwich fixed star hour angle at the moment according to the fire point moment; according to the satellite orbit information, the satellite attitude information and the sensor installation information of the fire point moment and the fire point orientation vector information output by the sensor, obtaining the position vector information of the earth center pointing to the ground fire point; and obtaining geographic latitude and longitude information of the fire point according to the position vector of the ground center pointing to the ground fire point. According to the method for measuring the longitude and latitude of the fire point, the practicability, the intelligence and the autonomy level of the sensor are improved.

Description

technical field [0001] The invention relates to a method for measuring the longitude and latitude of a fire point sensor, belonging to the technical field of satellite attitude control. Background technique [0002] The fire point detection sensor is a newly developed sensor. The direct output information of the sensor is the vector position of the fire point in the sensor reference mirror coordinate system, and the fire point position that the user wants to obtain is the geographic longitude and latitude position of the fire point, while At present, there is no method for determining the geographic longitude and latitude of the fire point. Contents of the invention [0003] The technical solution of the present invention is to obtain the geographical longitude and latitude position of the fire point according to the output of the fire point detection sensor and the satellite orbit attitude information, so as to provide the most direct data service for the user. [0004] ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C15/00B64G1/24
CPCG01C15/00B64G1/244
Inventor 刘洁张涛陈超周剑敏乌日娜邓楼楼程莉刘彤杨晓龙王子寒
Owner BEIJING INST OF CONTROL ENG
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