Let's look at some key considerations. The range of technical parameters associated with satellite imagery is straightforward. The most popular way to classify imagery is by resolution. Therefore, an automobile or a small boat are easy to detect with such an image. A second key parameter is spectral range and number of bands.
Broad bands tend to have higher resolution than narrow multiband sensors.
Radar satellites capture images at radar frequencies instead of visible or infrared portions of the spectrum. The third major issue typically is currency. Some satellite systems and their associated vendors offer archived data-older imagery often provided at lower cost than current data. In addition, satellites, by the nature of orbit physics, infrequently revisit the same place on Earth. Some satellites don't have onboard storage capability, so images must be transmitted to a ground station within view.