Sun synchronous orbit drop point local time dual-offset passive control method
A technology of sun-synchronous orbit and descending node, which is applied in the direction of motor vehicles, space navigation vehicle guidance devices, space navigation equipment, etc., to achieve the effect of less calculation, fuel saving, passive control principle and calculation process optimization.
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[0027] A sun-synchronous orbit descending node local time double bias passive control method, such as figure 1 As shown, the specific steps are as follows:
[0028] (1) Obtain the local time of the sun-synchronous orbit and adjust the mission's preset sun-synchronous orbit altitude H, nominal descending node local time LTDN 0 and satellite design life T;
[0029] According to the patent: "Sun-synchronous orbit inclination offset method considering multi-mission altitude", ZL201310108729.6, the formula (1) in the calculation of the nominal inclination i corresponding to the working height H 0 , the relationship between the two satisfies the following conditions:
[0030]
[0031] where p=a(1-e 2 ), a=R e + H, R e is the semi-major axis of the earth, e is the orbital eccentricity, μ is the gravitational constant of the earth, J 2 is the second-order harmonic coefficient of the earth’s gravity, J 4 is the fourth-order harmonic coefficient of the earth’s gravity, n s ...
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