| snippet:
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AVIRIS-3 Radiance Data: Relative Char and Ash Product for the Southern California Wildfires January 2025. |
| summary:
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AVIRIS-3 Radiance Data: Relative Char and Ash Product for the Southern California Wildfires January 2025. |
| extent:
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[[-118.738992924268,34.0178522817048],[-117.989261588903,34.2253424309569]] |
| accessInformation:
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AVIRIS-3 Radiance Data: Eckert, R., D.R. Thompson, A.M. Chlus, J.W. Chapman, M. Eastwood, M. Bernas, S. Geier, M. Helmlinger, D. Keymeulen, E. Liggett, S. Nadgauda, L.M. Rios, L.A. Shaw, W. Olson-Duvall, P.G. Brodrick, and R.O. Green. 2024. AVIRIS-3 L1B Calibrated Radiance, Facility Instrument Collection. ORNL DAAC, Oak Ridge, Tennessee, USA. https://doi.org/10.3334/ORNLDAAC/2356AVIRIS-3 Reflectance Data: Brodrick, P.G., A.M. Chlus, U.N. Bohn, E. Greenberg, J. Montgomery, J.W. Chapman, M. Eastwood, S.R. Lundeen, R. Eckert, W. Olson-Duvall, D.R. Thompson, and R.O. Green. 2025. AVIRIS-3 L2A Orthocorrected Surface Reflectance, Facility Instrument Collection. ORNL DAAC, Oak Ridge, Tennessee, USA. https://doi.org/10.3334/ORNLDAAC/2357 |
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true |
| thumbnail:
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thumbnail/thumbnail.png |
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1.7976931348623157E308 |
| typeKeywords:
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["Data","Service","Map Service","ArcGIS Server"] |
| description:
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<div style='text-align:Left;'><div><div><p><span style='font-weight:bold;'>Date of Image(s):</span></p><p><span>January 11, 2025.</span></p><p><span style='font-weight:bold;'>Date of Next Image</span></p><p><span>Airborne Survey - flown on an as-possible basis, currently unknown if second flight will occur.</span></p><p><span style='font-weight:bold;'>Summary</span></p><p><span>This product shows the char/ash fraction of each pixel based on airborne imaging spectroscopy measurements from NASA JPL AVIRIS-3. The surface reflectance was first estimated using ISOFIT, after which a Spectral Unmixing algorithm was used to determine the amount of burned area (char and ash) within each pixel, based on the MESMA approach.</span></p><p><span style='font-weight:bold;'>Suggested Use</span></p><p><span>The product describes the relative amount of char and ash (0-1) within each pixel. In order to deliver a product with low latency, the endmember library used was constrained to that common to a Southern California urban environment, and manual masking was also used. Locations that are heavily shaded may have errant solutions. The product also only indicates the burn fraction of the exposed surface - not what lies underneath. Areas covered by ash, for example, may express as having a fraction despite having only a thin coating of ash on top.</span></p><p><span style='font-weight:bold;'>Resolution</span></p><p><span>The product ground spatial resolution is approximately 2.8 m, and flights occurred between 19:40 and 21:00 UTC on Jan 11th 2025. Raw data are available for download here: https://popo.jpl.nasa.gov/pub/LA_Fires/working/eaton_1.tif. </span></p><p><span>The burn fraction index uses a blue-red-yellow color ramp, beginning at 80% relative abundance of ash/char. </span></p><p><span>Point of Contact: Philip G. Brodrick and David R. Thompson </span></p><p><span style='font-weight:bold;'>Credits</span></p><p><span style='font-style:italic;'>AVIRIS-3 Radiance Data: </span></p><p><span>Eckert, R., D.R. Thompson, A.M. Chlus, J.W. Chapman, M. Eastwood, M. Bernas, S. Geier, M. Helmlinger, D. Keymeulen, E. Liggett, S. Nadgauda, L.M. Rios, L.A. Shaw, W. Olson-Duvall, P.G. Brodrick, and R.O. Green. 2024. AVIRIS-3 L1B Calibrated Radiance, Facility Instrument Collection. ORNL DAAC, Oak Ridge, Tennessee, USA. https://doi.org/10.3334/ORNLDAAC/2356</span></p><p><span style='font-style:italic;'>AVIRIS-3 Reflectance Data: </span></p><p><span>Brodrick, P.G., A.M. Chlus, U.N. Bohn, E. Greenberg, J. Montgomery, J.W. Chapman, M. Eastwood, S.R. Lundeen, R. Eckert, W. Olson-Duvall, D.R. Thompson, and R.O. Green. 2025. AVIRIS-3 L2A Orthocorrected Surface Reflectance, Facility Instrument Collection. ORNL DAAC, Oak Ridge, Tennessee, USA. https://doi.org/10.3334/ORNLDAAC/2357</span></p><p><span style='font-weight:bold;'>Rest Endpoint</span></p><p><span>See URL on the right side of the page.</span></p><p><span style='font-weight:bold;'>WMS Endpoint</span></p><p><span /></p></div></div></div> |
| licenseInfo:
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<div style='text-align:Left;'><div><p><span>NASA data and products are freely available to federal, state, public, non-profit and commercial users. This information can be experimental- or research-grade data products and may not be appropriate for operational use. These NASA data products, services, and the Disasters Mapping Portal are intended to aid decision makers and enhance situational awareness, but these data are not guaranteed to be consistently available or routinely updated.</span></p></div></div> |
| catalogPath:
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|
| title:
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aviris3_charash |
| type:
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Map Service |
| url:
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|
| tags:
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["char","ash","AVIRIS","AVIRIS-3","California","Los Angeles","Wildfires"] |
| culture:
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en-US |
| name:
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aviris3_charash |
| guid:
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90FAEDCD-2609-44EB-B232-6DB499497896 |
| minScale:
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0 |
| spatialReference:
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WGS_1984_UTM_Zone_11N |