From an end user's perspective one of the most important things to keep in mind is that the band configuration for Landsat 8 (LDCM) is different from the Landat TM and ETM+ missions as Landsat 8 added two new bands. Want to make a natural color composite from Landsat 8? It will now be R-G-B = 4-3-2 (for Landsat 4,5, and 7 it was 3-2-1). The USGS has a very helpful FAQ page listing the band numbers and wavelengths for all the Landsat missions. There is another handy USGS page that displays the band combinations of Landsat 8 to Landsat 7 (see graphic below)
Source: NASA
Landsat 8 will be 12-bit data, compared to the 8-bit data used for previous Landsat missions. Pixel values will now range from 0-4095 (4096 possible values) for Landsat 8, as compared to 0-255 (256 possible values) for the previous missions. This should make it easier to distinguish features that are spectrally similar and shadow penetration will be much improved.
Because Landsat 8 is not yet officially operational you cannot download scenes from sites like GloVis just yet, but you can download a sample dataset to play around with courtesy of the USGS.
With the new bands, and 16-bit data, file sizes will be larger than previous missions. You'll notice that the sample image, unpacked, is 1.4 GB.
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ReplyDeleteAbogado DUI Charlotte VA "What You Should Know About Landsat 8" is a comprehensive guide for Earth observation enthusiasts, highlighting the satellite's technological advancements, applications, and significance in environmental monitoring. It is accessible to beginners and experts, showcasing its impact on sectors like agriculture and climate studies. The guide uses well-designed visuals and diagrams to simplify complex concepts, making it an excellent reference for students, researchers, and professionals interested in Earth observation.
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ReplyDeleteThe 'What You Should Know About Landsat 8' provides an informative overview of the satellite's key features and capabilities, its contributions to Earth observation, and its potential applications in scientific research, environmental monitoring, and other fields. The review clarifies technical jargon for a broader audience, and incorporates visual aids like diagrams or images to help readers visualize the satellite's functions and impact on Earth monitoring applications. The review also highlights future developments related to Landsat 8, keeping readers informed about ongoing innovations in Earth observation technology.
Launched in 2013, Landsat 8 is a crucial tool for Earth monitoring. It provides unmatched insight into changes in the world's land cover, environmental trends, and the management of natural resources. It is run by NASA and the USGS. Landsat 8 is able to obtain high-resolution pictures across the electromagnetic spectrum thanks to its sophisticated sensor suite, which includes the Thermal Infrared Sensor (TIRS) and Operational Land Imager (OLI). Its free and open data policy promotes urban planning, disaster relief, and science globally. Because of its durability, accuracy, and ease of use, Landsat 8 is a vital tool for tracking Earth's changing landscapes and tackling pressing issues like climate change and sustainability.
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