Advanced Very High Resolu⁃tion Radiometer

The Advanced Very High Resolution Radiometer (AVHRR) is a sensor that is used to collect visible and infrared data from the Earth's surface. It is one of the most widely used sensors in the field of remote sensing and is used for a variety of applications, including weather forecasting, land and vegetation management, and oceanography.

The AVHRR was first launched in 1978 and has been used on a number of satellites since then, including NOAA-6, NOAA-7, NOAA-9, NOAA-11, NOAA-14, NOAA-15, and NOAA-19. The sensor collects data in five spectral bands, covering wavelengths from visible to thermal infrared, and has a spatial resolution of up to 1.1 km.

The data collected by the AVHRR can be used to produce a variety of products, including surface temperature, vegetation indices, cloud cover, sea surface temperature, and sea ice extent. These products are used by a variety of organizations, including weather forecasters, agricultural and land management agencies, and oceanographers.

Overall, the AVHRR has played an important role in advancing our understanding of the Earth's surface and atmosphere, and will continue to be an important tool for remote sensing in the years to come.