Sentinel-2 what is it?

Sentinel-2 is a pair of Earth-observing satellites developed by the European Space Agency (ESA) as part of the Copernicus program. The primary goal of the Sentinel-2 mission is to provide high-resolution optical imagery of the Earth’s surface, which is valuable for a wide range of applications, including environmental monitoring, agriculture, forestry, land use planning, disaster management, and more. Here are some key features and information about the Sentinel-2 mission:

  1. Multispectral Imaging: Sentinel-2 satellites are equipped with a MultiSpectral Instrument (MSI) that captures imagery in 13 spectral bands. This multispectral capability allows for detailed observations of the Earth’s land and coastal areas in a range of visible and infrared wavelengths.
  2. High Resolution: Sentinel-2 offers high-resolution imagery with a spatial resolution ranging from 10 meters (for the visible and near-infrared bands) to 60 meters (for the shortwave infrared bands). This high spatial resolution is useful for detailed mapping and monitoring.
  3. Global Coverage: The Sentinel-2 constellation consists of two identical satellites, Sentinel-2A and Sentinel-2B, positioned in a sun-synchronous orbit. These satellites work together to provide global coverage of the Earth’s landmasses with a revisit time of 5 days, which is particularly valuable for monitoring dynamic changes on the Earth’s surface.
  4. Free and Open Data: One of the significant advantages of the Sentinel program is that the data is freely available to the public and can be accessed through the Copernicus Open Access Hub. This open data policy promotes widespread use of the imagery for research and practical applications.
  5. Applications: Sentinel-2 data has numerous applications, including monitoring land cover and land use changes, assessing crop health and productivity, tracking deforestation, monitoring water quality in lakes and rivers, assessing natural disasters like wildfires and floods, and supporting urban planning.
  6. Environmental Benefits: The Sentinel-2 mission contributes to environmental protection and sustainable development by providing essential data for understanding and addressing global challenges related to climate change, resource management, and biodiversity conservation.
  7. Continued Expansion: The Sentinel program is part of a larger network of Earth-observing satellites within the Copernicus program. Future missions, such as Sentinel-2C and Sentinel-2D, are planned to ensure the continuity of data and further improve Earth monitoring capabilities.

In summary, Sentinel-2 is a crucial component of the Copernicus program, providing detailed and freely accessible Earth observation data that is invaluable for a wide range of applications and research efforts related to Earth’s environment and natural resources.