What remote sensing data are available now? What are the commonly used remote sensing images now?

Remote sensing data are categorized by resolution as follows:

High resolution (chargeable)

Gaofen series: Gaofen-1 2m, Gaofen-2 0.8m;

Resource series: Resource-3, Resource-02C;

Foreign data: wordview, planet

Medium and low resolution: (on remote sensing bazaar) free)

Gaofen-1 16m

planet(PS0,PS1)

Environmental Star 30m

modis(250m+500m)

Currently the commonly used remote sensing images are:

Domestic Gaofen-2 and Resource-3 which has a better evaluation; the Gaofen-2 image data are the first sub-meter level in China, so it's not a bad choice. The first sub-meter level, so the price per view will be more expensive, but the remote sensing bazaar to provide "1 square kilometer subscription" service, do not need to buy the whole scene, at least a few dozen dollars can be purchased, is very real and very practical, not a waste.