Landsat 7 for the launch. NASA.
Landsat 7 is a satellite in the Landsat Program, a joint project of US Geological Service (USGS) and NASA. The satellite was launched on April 15, 1999 with a Delta II launcher. Specifications
Landsat 7 is designed for a lifespan of 5 years. The mission of the mission is to make more than 532 photos a day. The satellite describes a polar orbit around the earth. In 232 jobs or 16 days the whole earth is photographed. The satellite weighs 1973 kilos, is 4.04 meters long and has a diameter of 2.74 meters. Landsat 7, with its solid state drive, has a storage capacity of 378 gigabytes of data, which amounts to about 100 satellite photos. The most important instrument on board the satellite is the ETM + (Enhanced Thematic Mapper Plus). The ETM + creates satellite images in different bands of the light spectrum:
Through the combination of observations in different tires, certain aspects of the earth can be studied separately, such as water and vegetation. After three years of observation, a moving mirror has fallen out of the ETM + sensor. This very fast pivoting mirror corrected the images for the continuous movement of the satellite. Images taken after this problem still have about 80% of useful footage. Schema
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