They can see through clouds and work during the day and at night. They can also see changes in the soil, the vegetation, or snow, etc.
satellite equipped with radar
man made satellites are used to orbit around the earth. these satellites collect information that can be used for communication, defense, weather forecasting, research etc..
Wheather satellites are used to take close pictures of the earth . Communication satellites are used for communication. Ex(in the old days if you sent a letter from Canada to Russia it would take 25 days. Now you write in MSN, it goes to the satellite and to the reciever.)
Sattelites are not likely to be on a map. The reason for this, is because some sattlites need to be kept under lock and key because of the things that they monitor.
We have used artificial satellites in order to take pictures and study the moon and they did travel around it.
its weather satellites because the monitor atmospheric temperature and humidity, ground and surface.
weather satellites
photograph movement from being up there
By "seeing" under water.
When radar stations on the Earth monitor the location and movements of satellites, they are said to be tracking the satellites.
Monitor changes in the color of Earth's oceans :)
satellite equipped with radar
I believe that NASA not only sends the satellites up they also monitor them on a daily basis.
how are satellites used in forecasting insat 1A
Geostationary satellites are the ones used for GPS satellites.
Scientists can monitor changes in elevation as well as horizontal movement along faults using a network of Earth-orbiting satellites called GPS.
Sonar provides detailed images of small areas of the ocean floor.