Published: July 21, 2025 by: Rungruang Huanraluek
What Are Satellites Used For?
A satellite is an object sent by humans to orbit the Earth (or the Moon, Mars, etc.). Satellites are not just inventions floating in space but important tools that help humans develop technology, acquire knowledge, and ensure security for our world in almost every aspect. They are intelligent human inventions orbiting Earth, acting as the eyes and ears in space, allowing us to communicate, connect, explore, and research widely. Satellite usage can be classified into various types according to their main missions as follows:
1. Communication Satellite
This type of satellite plays a vital role in connecting the entire world, whether through telephone, internet, television, or radio. From live sports broadcasts to teleconferencing and emergency communications, communication satellites help people in remote areas access information and communicate more easily and conveniently, especially those in geostationary orbit that can continuously cover wide areas.
2. Earth Observation Satellite
Earth observation satellites are used to monitor environmental changes, climate, disasters, and agriculture. Equipped with multi-resolution cameras and various sensors, they can collect precise geographic and environmental data such as surface temperature, moisture levels, forests, and polar ice. These satellites play an essential role in research, weather forecasting, and monitoring the effects of climate change.
3. Navigation Satellite
Navigation satellite systems enable people to accurately determine their positions. Every time we use smartphones for maps or call for a ride, GPS or other navigation satellites are the key helpers behind. This technology is also used in aviation, maritime, smart agriculture, and cargo transportation industries.
4. Military & Defense Satellite
Military satellites have diverse missions including reconnaissance, high-resolution imaging, monitoring opponent troop movements, and tactical communications to enable military coordination globally. These satellites are part of national security strategies of many countries, enhancing defense capabilities and security operations.
5. Scientific & Space Exploration Satellite
Scientific and space exploration satellites are usually sent to study astronomy, space physics, or even detect cosmic rays and particles from the universe. These satellites help scientists understand mysterious phenomena of the cosmos such as cosmic radiation, gravitational waves, and mysteries related to the solar system. Using space telescopes like Hubble allows humans to see distant stars and galaxies more clearly than ever before.
References and Image Sources
https://www.linkedin.com/pulse/unlocking-power-earth-observation-geospatial-technology-bhoda
https://gisgeography.com/geosynchronous-geostationary-orbits/
https://www.geniustracks.com/gps-tracking-%E0%B8%84%E0%B8%B7%E0%B8%AD-2/
