The Method of Analyzing igso Satellite's Area Covering Arc Based on Characteristic Points
A technology of area coverage and feature points, applied in navigation, instrumentation, surveying and navigation, etc., can solve problems such as inapplicability, and achieve the effect of realizing calculation efficiency and improving calculation and analysis efficiency
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Embodiment 1
[0035] A method for analyzing an arc segment covered by an IGSO satellite based on a feature point, the specific process is as follows:
[0036] According to the given initial moment and orbit parameters, and set the time step, based on the orbital dynamics equation, calculate the position component of the satellite in the geocentric inertial system corresponding to each moment of each interval of the time step within a specified period of time; According to the given target area, determine its corresponding marker point;
[0037] Determine whether the IGSO satellite can cover the target area at each time interval of the time step within the specified period, record the corresponding time that can be covered, and form a coverage arc according to the recorded time; whether the IGSO satellite can The basis for judging the coverage of the target area is to calculate the critical opening angle corresponding to each marker point and the satellite opening angle according to the sate...
Embodiment 2
[0039] Such as figure 1 Shown is the analysis flow chart of this implementation method. In this embodiment, a method for analyzing an arc segment covered by an IGSO satellite based on a feature point, the specific process is:
[0040] (1) According to the given initial moment and orbital parameters, the orbital parameters include semi-major axis, eccentricity, orbital inclination, right ascension of ascending node, argument of perigee and true anomaly, and convert the initial orbital parameters into satellite’s position and velocity;
[0041] Based on the orbital dynamics equation considering the influence of gravity at the center of the earth and the perturbation of the J2 term, set the step size to calculate the component of the satellite position in the geocentric inertial system at each moment within the specified period, where the calculation step size can be adjusted , which is 1min by default.
[0042] (2) Determine the corresponding marker points according to the gi...
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