🌎 🛰️ 15 super important EARTH OBSERVING SATELLITES with the functions they play in monitoring the earth - part 1
1️⃣ Landsat series (United States)
- The Landsat program has captured over 9 million scenes since its inception, covering approximately 60% of the Earth's land surface, forming one of the most extensive archives of Earth observation data.
- Landsat satellites have orbited the Earth over 7,000 times, providing continuous global coverage for monitoring land changes and environmental phenomena.
2️⃣ Sentinel series (European Union)
- The Sentinel satellites have captured over 1.5 petabytes of data since the launch of Sentinel-1A in 2014, contributing to a comprehensive and open-access Earth observation database.
- Sentinel-1 satellites have detected over 200,000 radar echoes, allowing for all-weather, day-and-night monitoring of land and ocean surfaces.
The Sentinel-2 satellites have collected over 2.5 million images since the launch of Sentinel-2A in 2015, with a spatial resolution of up to 10 meters.
3️⃣ Aqua (United States)
- Aqua has completed over 110,000 orbits around the Earth since its launch in 2002, collecting valuable data on Earth's water cycle and climate patterns.
- Aqua's onboard instruments have generated over 100 terabytes of data. Aqua's Moderate Resolution Imaging Spectroradiometer (MODIS) instrument captures approximately 3.9 terabytes of data per day.
4️⃣ Terra (United States)
- Terra's Multi-angle Imaging SpectroRadiometer (MISR) has acquired over 20 years of global imagery from nine different viewing angles, providing valuable insights into Earth's surface properties and atmospheric aerosols.
- Terra's Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) has collected over 2.95 million images since its launch in 1999, enabling detailed mapping of land surface temperature, vegetation, and geology.
5️⃣ NOAA series (United States)
- NOAA's Geostationary Operational Environmental Satellites (GOES) have provided continuous coverage of severe weather events, including hurricanes, tornadoes, and wildfires, helping to save lives and protect property.
- NOAA's Polar-orbiting Operational Environmental Satellites (POES) have monitored Earth's atmosphere, oceans, and land surfaces for over 40 years, supporting weather forecasting, climate research, and environmental monitoring efforts.
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