As an earth observation system, what are the characteristics of remote sensing compared with conventional means?

Synchronized observation over a large area, time constraints.

1, a large area of synchronized observation: remote sensing detection can be free of ground blocking and other restrictions, can quickly obtain information on the Earth's surface, to provide the best macro-observation, while conventional means in the observation of restrictions, the information will be incomplete.

2, time constraints: remote sensing detection can be repeated in a short period of time on the same area, greatly improving the observation of the time, while conventional means of time-consuming time.