Simplify the following text for a Grade 9 native English-speaking person.
Original: Its main role is to produce forecast models by gathering all the information from weather satellites in space and observations on earth , then processing it using two IBM supercomputers with a variety of models , based on a software package known as the Unified Model .
Simplified: The information is fed into two IBM supercomputers . The computers use models based on a software package known as the Unified Model .