A class of artificial earth satellites. Mainly used for scientific exploration, detection of the main targets are: Earth, near-Earth space, interplanetary space and the sun, planets and the universe can detect targets. Exploration of space physics include: solar radiation, micrometeorites, corona, high-energy particles, x-rays, γ rays, cosmic rays, solar wind, magnetic field, ionosphere, clouds, wind, temperature, radiation spectrum and so on target. |