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Landsat 7 Schematic. Landsat 7 was designed to last for five years, and has the capacity to collect and transmit up to 532 images per day. It is in a polar, Sun-synchronous orbit, meaning it scans across the entire Earth's surface. With an altitude of 705 km, it takes 232 orbits, or 16 days, to do so.
Low-res color bands + High-res grayscale band = High-res color image. Such band combinations are commonly bundled in satellite data sets, for example Landsat 7, which includes six 30 m resolution multispectral bands, a 60 m thermal infrared band plus a 15 m resolution panchromatic band.
Landsat-8: Active NASA and USGS 2013 Follow on to Landsat-7 with improved imager OLI and thermal sensor TIRS. Landsat-9: Active NASA and USGS 2021 Follow on to Landsat-8 with OLI sensor and thermal sensor TIRS-2. Landsat-9 will extend the Landsat program to maintain the time series of these type of data. Megha-Tropiques: Active CNES and ISRO: 2011
Carrying the same Multi spectral Scanner (MSS) but also carrying an Enhanced Thematic Mapper, which added a 15m resolution panchromatic band. Landsat 7: 15 April 1999: Active: 25 years, 9 months and 27 days Operating with scan line corrector disabled since May 2003. [13] The main component on Landsat 7 was the Enhanced Thematic Mapper Plus (ETM+).
Spectral band in NIR region with similar 20 m ground resolution is band 8A (central wavelength 865 nm). Sentinel-2 NDWI for agricultural monitoring of drought and irrigation management can be constructed using either combinations: band 8A (864 nm) and band 11 (1610 nm) band 8A (864 nm) and band 12 (2200 nm) Both formulations are suitable.
In the case of Landsat satellites, several different band designations have been used, with as many as 11 bands comprising a multispectral image. [ 17 ] [ 18 ] [ 19 ] Spectral imaging with a higher radiometric resolution (involving hundreds or thousands of bands), finer spectral resolution (involving smaller bands), or wider spectral coverage ...
Landsat 5, 7: 8212.5 MHz 8175-8215 MHz: Earth exploration-satellite service CBERS 2B 8103 MHz 8025-8175 MHz Earth exploration-satellite service 8212 MHz 8175-8215 MHz METEOROLOGICAL-SATELLITE SERVICE Earth exploration-satellite service 0 8321 MHz 8215-8400 MHz Earth exploration-satellite service SAC-C: 0 MHz 0-12 MHz
The first was placed aboard Landsat 4 (decommissioned in 2001), and another was operational aboard Landsat 5 up to 2012. [1] [2] TM sensors feature seven bands of image data (three in visible wavelengths, four in infrared) most of which have 30 meter spatial resolution.