What orbits do meteorological satellites and communication satellites use?

Meteorological satellites and communication satellites adopt sun-synchronous orbits; the theoretical definition of sun-synchronous orbit is that the precession direction of the orbital plane is roughly the same as the direction of the earth's revolution, and the precession angular rate is equal to the average angular rate of the earth's revolution. track.

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What kind of orbits do meteorological satellites and communication satellites use?

Sun-synchronous orbit.

The theoretical definition of a sun-synchronous orbit is: an artificial earth whose orbital plane precesses in roughly the same direction as the Earth's revolution, and whose precession angular rate is equal to the average angular rate of the Earth's revolution (0.9856 degrees/day or 360 degrees/year) satellite orbit.

In fact, to put it simply, it is to ensure that satellites pass through the local orbit at the same latitude in the same direction every day. Because we know that the period of satellite operation is determined by the orbit at the location, therefore, such an orbit can be determined.

Introduction

Choosing a sun-synchronous orbit can ensure that the satellite passes through a designated area at a specific time every day, which of course allows us to obtain the best sunlight conditions , thereby obtaining high-quality ground target images, which is why meteorological satellites and resource satellites usually choose sun-synchronous orbits.

In the vast starry sky, those who are interested will find that some satellites almost always appear at the same position in the sky at the same time. Is it strange? It's not surprising at all, since they are in geosynchronous orbit.

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