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Google maps satellite imagery4/30/2024 ![]() ![]() ![]() The resolution of satellite images varies depending on the instrument used and the altitude of the satellite's orbit. This compares to a 0.3 m resolution obtained by some early military film based Reconnaissance satellite such as Corona. The latest commercial satellite (GeoEye 1) has a GSD of 0.41 m. For example, the GSD of Landsat is ≈30m, which means the smallest unit that maps to a single pixel within an image is ≈30m x 30m. GSD is a term containing the overall optical and systemic noise sources and is useful for comparing how well one sensor can "see" an object on the ground within a single pixel. Geometric resolution refers to the satellite sensor's ability to effectively image a portion of the Earth's surface in a single pixel and is typically expressed in terms of Ground sample distance, or GSD.Radiometric resolution is defined as the ability of an imaging system to record many levels of brightness (contrast for example) and to the effective bit-depth of the sensor (number of grayscale levels) and is typically expressed as 8-bit (0–255), 11-bit (0–2047), 12-bit (0–4095) or 16-bit (0–65,535).days) that passes between imagery collection periods for a given surface location ![]() temporal resolution is defined by the amount of time (e.g.spectral resolution is defined by the wavelength interval size (discrete segment of the Electromagnetic Spectrum) and number of intervals that the sensor is measuring.m 2) being measured on the ground, determined by the sensors' instantaneous field of view (IFOV) spatial resolution is defined as the pixel size of an image representing the size of the surface area (i.e.Campbell (2002) defines these as follows: There are five types of resolution when discussing satellite imagery in remote sensing: spatial, spectral, temporal, radiometric and geometric. Please discuss this issue and help introduce a summary style to the section by replacing the section with a link and a summary or by splitting the content into a new article. This section duplicates the scope of other articles, specifically Remote sensing#Data characteristics. In the early 21st century satellite imagery became widely available when affordable, easy to use software with access to satellite imagery databases was offered by several companies and organizations. There are also private companies that provide commercial satellite imagery. Several other countries have satellite imaging programs, and a collaborative European effort launched the ERS and Envisat satellites carrying various sensors. The first television image of Earth from space transmitted by the TIROS-1 weather satellite in 1960.Īll satellite images produced by NASA are published by NASA Earth Observatory and are freely available to the public. The most recent Landsat satellite, Landsat 9, was launched on 27 September 2021. In 1977, the first real time satellite imagery was acquired by the United States's KH-11 satellite system. Also in 1972 the United States started the Landsat program, the largest program for acquisition of imagery of Earth from space. The Blue Marble photograph was taken from space in 1972, and has become very popular in the media and among the public. The first satellite photographs of the Moon might have been made on October 6, 1959, by the Soviet satellite Luna 3, on a mission to photograph the far side of the Moon. The first satellite (orbital) photographs of Earth were made on August 14, 1959, by the U.S. With an apogee of 65 miles (105 km), these photos were from five times higher than the previous record, the 13.7 miles (22 km) by the Explorer II balloon mission in 1935. The U.S-launched V-2 flight on October 24, 1946, took one image every 1.5 seconds. The first images from space were taken on sub-orbital flights. At the time, the satellite was crossing Mexico. The photo was taken when the satellite was about 17,000 mi (27,000 km) above the surface of the Earth on August 14, 1959. Further information: First images of Earth from space The first crude image taken by the satellite Explorer 6 shows a sunlit area of the Central Pacific Ocean and its cloud cover.
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