Meaning: Satellites help us understand and predict the weather.
Choice of Words: Help means to assist or aid. Weather is the state of the atmosphere.
Meaning: This is another way of saying that satellites help us learn about the weather.
Choice of Words: Helpers are people or things that make tasks easier. In this case, satellites are the helpers for weather.
Meaning: This is a fun way of saying that satellites are there to help us understand the weather.
Choice of Words: Friends are people or things that you like and trust. Here, satellites are the friends of weather.