SATELLITES 
Artificial body placed in orbit round the earth or moon or another planet in order to collect information or for communication.
A satellite works by receiving radio signals sent from the Earth and resending the radio signals back down to the Earth.
TYPES OF SATELLITES
INTERNAL SAPCE STATION
COMMUNICATION
WEATHER
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GLOBAL POSITIONING SYSTEM (GPS)
ASTRONOMICAL
EARTH MONITORING
POLAR
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NAVIGATION
WORKING OF DIFFERENT TYPES OF SATELLITES
EO=>Satellite-based EO relies on the use of satellite-mounted payloads to gather imaging data about the Earth's characteristics.
COMMUNICATION=>Transmits the signal via a transponder by creating a channel between the transmitter and the receiver at different Earth locations
GPS=>These satellites are constantly sending out radio signals. GPS receivers are programmed to receive information about where each satellite is at any given moment.
NAVIGATION=>Operating on the designated orbit transmits radio navigation signals continuously under the control of the satellite clock
WEATHER=>Record or transmit images of the entire hemisphere below continuously with their visible-light and infrared sensors.
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ISS=>The ISS orbits the Earth every 90 minutes, which gives the crew 16 sunrises and sunsets every day.
POLAR=>Revolve around the earth in a north-south direction around the earth as opposed to east-west like the geostationary satellites.
ASTRONOMICAL=>Satellite's vision is not clouded by the gases that make up the Earth's atmosphere, and its infrared imaging equipment is not confused by the heat of the Earth.
APPLICATION OF DIFFERENT TYPES OF SATELLITES
COMMUNICATION=>Telephone, radio, television, internet, and military applications
WEATHER=> Detect the development and movement of storm systems and other cloud patterns
ISS=>Used for the trials of spaceship equipment and systems that are needed for Mars and Moon missions.
ASTRONOMICAL=>Geodetic position, speed, and direction of a surface vehicle or aircraft, north reference, and vertical reference.
EO=>Agriculture, water resources, urban planning, rural development, mineral prospecting, environment, forestry, ocean resources and disaster management.
POLAR=>Weather applications where predicting weather and climate-based disasters can be done in a short time.
NAVIGATION=> They can be used to make star maps.
GPS=>LOCATION,MAPPING,TRAKING