What is a multispectral image?

The multispectral image is created by measuring energy at different wavelengths and using different colors to represent the energy present along each separate wavelength. Various gray images, known as belts, receive a different color and are combined to create a folded image. For example, band A can be red, while belt B is color blue and band C is colored green. Put them together and color patterns created in the composite image allow the viewer to identify the surface features of the object. The Landsat Landsat Satellite program has provided a huge number of multispectral images since its first satellite launch in 1972. This satellite relay transmits a huge amount of data back on Earth continuously. Landsat 7, the latest satellite Landsat, is Ján orbit, which allows it to re -guide the 2 -step part of the country every 16 days.

infoRMACE provided by multispectral images of Landsat are valuable in many areas, including hydrology, environmental monitoring and soil use. Many countries rely on information from the US program and set up the station to receive this information directly. The stations allow these countries the opportunity to get information almost as soon as they are collected, without delaying the waiting for processing and redistribution of images. NASA approves the station by agreeing that the station will provide data to those who need it in their region.

Multispectral display from Space began in 1968, when NASA included it in the Apollo 9 mission. It did not take long and the satellites without the operator designed specifically for multispectral display were launched. Since then, technology has not stopped proceeding in decades and hyperspectral imaging that can capture the so-called narrow zone of information-in comparison with a wide range of multispectral display-nine provides even more detailed data for scientists and more.

hyperspectral imaging can capture the line width as relatively small as 11 kilometers or less than 7 miles. The problem with such display was the long speed required from the passenger device on fast moving air and space vehicles. The vehicle speed remained too little time to focus on the device and create such a detailed picture. Scientific advances have erased this barrier.