Category: Remote sensing

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LANDSAT: Satellite Sensor

A color infrared composite (bands 432) of a Landsat 7 ETM+ acquisition on Nov. 13, 2002. This subset, from path 27 row 39, is centered on downtown Austin, Texas, and shown at a scale of 1:100,000.
A color infrared composite (bands 432) of a Landsat 7 ETM+ acquisition on Nov. 13, 2002. This subset, from path 27 row 39, is centered on downtown Austin, Texas, and shown at a scale of 1:100,000.


Description
NASA developed and launched the Landsat satellites, and the USGS handles the flight operations, maintenance, and management of all ground data reception, processing, archiving, product generation, and distribution. The legacy of Landsat satellites began in 1972 with the launch of Landsat 1. Since …

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Remote Sensing Resampling Methods

When an image is created through remotely sensed data, it needs to undergo some form of validation procedure using observational and/or sampling techniques. Failure to do so will reduce the confidence in the final product. The following are examples of remote sensing resampling methods:

 

Nearest neighbor

Nearest neighbor is a resampling method used in remote sensing. The approach assigns a value to each “corrected” pixel from the nearest “uncorrected” pixel. The advantages of nearest neighbor include simplicity and the ability …

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MODIS: Satellite Sensor

A visible color composite (bands 1-Red, 4-Green, and 3-Blue) of a Terra MODIS acquisition on Nov. 17, 2006. This subset is centered on the city of Houston, Texas. Sediment-laden water is visible in Trinity Bay and Galveston Bay, southeast of Houston. In the northwest corner of the image subset, farmland along the Brazos River and urban lands in the cities of Bryan and College Station, Texas, are easily identified.

Description
The MODIS (Moderate-Resolution Imaging Spectroradiometer) instruments are part of the …

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