Global carbon inventory satellite

The invention provides a global carbon inventory satellite, which comprises a frozen orbit unit configured to set an orbit inclination angle so that the global carbon inventory satellite operates on a frozen orbit, and an apogee of the frozen orbit is frozen above the latitude of a human activity dense area; the sun-synchronous orbit unit is configured to enable the global carbon inventory satellite to still run on a sun-synchronous orbit, so that the global carbon inventory satellite is always in an illumination area when running to an apogee; wherein the relation between the perigee orbit height and the apogee orbit height is obtained according to the value of the ascending node of the sun-synchronous orbit, the value of the orbit inclination angle, the first function and the second function; the first function represents the relationship between the orbit semi-major axis and the perigee orbit height and the apogee orbit height; the second function represents a relationship between the orbital eccentricity