1. “Agitation”
Start by using chemical to stimulate the air mass to float up high in order to produce steam or humidity. This will help form rain clouds and increase the amount of rainfall.
2. “Fattening"
Fatten the rain clouds through the sprinkle of chemicals to make the water droplets condense.
3. "Attacking"
Fly the plane to the fattened clouds, to further modify the surroundings and speed up the process.