Identifying stressed plants (1/2)
Chlorophyll is an essential part of the process of photosynthesis. It absorbs solar energy in order to provide power for the process of photosynthesis. Because it absorbs energy, it has an important effect on the amount of energy that is reflected (see here how light interacts with vegetation).
With remote sensing we can directly estimate how much chlorophyll there is in a plant. By combining more than one bands of the recorded remote sensing data, we can create vegetation indices and use them to estimate crop status.