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SAR Processing and Data Analysis - NASA
• Speckle is part of radar images and makes interpretation difficult because the “salt and pepper” effect corrupts information about the surface – There are many techniques to extract radar information from images that have a lot of speckle – You can use speckle filters, or multilook the image. We will use multilook 3.
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Introduction to Remote Sensing - NASA
appliedsciences.nasa.gov•Remote sensing data comes in multiple images, each representing a different range, or band, of wavelengths •The pixel values of the images represent the intensity of the energy from the source •Multiple band images can be stacked and viewed at once ... Introduction to Remote Sensing
Introduction to SAR Interferometry - NASA
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Part 1: Using Google Earth Engine for Land Monitoring ...
appliedsciences.nasa.govThresholding rates the severity of wildfire burning to complete a full burn severity assessment. • Refer to the step-by-step UN-SPIDER burn severity in GEE training. Example of burn severity mapping using Sentinel- 2 data in Empedrado, Chile in February 2017. This map was produced using the UN-SPIDER Burn Severity with GEE script. Credit: UN ...
Basics of Synthetic Aperture Radar - NASA
appliedsciences.nasa.govNational Aeronautics and Space Administration Applied Remote Sensing Training Program 7 . Active and Passive Remote Sensing . Passive Sensors: • The source of radiant energy arises from natural sources • e.g. the sun, Earth, other “hot” bodies . Active Sensors • Provide their own artificial radiant energy source for illumination • e.g.
Part 3: Using Google Earth Engine for Land Monitoring ...
appliedsciences.nasa.gov– For example, drought years vs. non -drought years Aug 1999. Aug 2000. Aug 2001. Aug 2002. Aug 2003. ... – Healthy vegetation has high ... – The same spatial resolution – Data from the exact same or similar times of day, days of the year, and/or seasons
NASA Applied Science | Applied Sciences Website
appliedsciences.nasa.govNASA Applied Science | Applied Sciences Website
Monitoring Applications Part 2: Using Google Earth Engine ...
appliedsciences.nasa.govspectral bands and attempts to classify each individual pixel based on this spectral information. • Spectral Signature: – Objects on the ground reflect electromagnetic radiation differently in different wavelengths. • Example: Green vegetation absorbs red wavelengths but reflects near-infrared (NIR) wavelengths. Landsat Bands Percent ...