[13] The RapidEye constellation contains identical multispectral sensors which are equally calibrated. It uses the DN or radiance values of each pixel from different images in order to derive the useful information through some algorithms. An example is given in Fig.1, which shows only a part of the overall electromagnetic spectrum. "Due to higher government demand for the 1K 1K detectors, we are able to increase our volumes and consequently improve our manufacturing yields, resulting in lower costs," says Bainter. "But in most cases, the idea is to measure radiance (radiometry) or temperature to see the heat signature.". A. Al-zuky ,2011. Some of the popular SM methods for pan sharpening are Local Mean Matching (LMM), Local Mean and Variance Matching (LMVM), Regression variable substitution (RVS), and Local Correlation Modelling (LCM) [43-44]. Remote sensing on board satellites techniques , as a science , deals with the acquisition , processing , analysis , interpretation , and utilization of data obtained from aerial and space platforms (i.e. Other methods of measuring the spatial resolving power of an imaging system based upon the ability of the system to distinguish between specified targets [17]. Eumetsat has operated the Meteosats since 1987. Slow speeds are the biggest disadvantage associated with satellite Internet. Multi-source remote sensing data fusion: status and trends, International Journal of Image and Data Fusion, Vol. So, water vapor is an invisible gas at visible wavelengths and longer infrared wavelengths, but it "glows" at wavelengths around 6 to 7 microns. "At the same time, uncooled system performance has also increased dramatically year after year, so the performance gap is closing from both ends.". >> L.G. This accurate distance information incorporated in every pixel provides the third spatial dimension required to create a 3-D image. The SWIR portion of the spectrum ranges from 1.7 m to 3 m or so. What is the Value of Shortwave Infrared?" It is represented by a 2-dimensional integer array, or a series of 2- dimensional arrays, one for each colour band [11]. Which satellites can provide highest spatial resolution for Thermal

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