The next resolution

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dawitdem
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The next resolution

by dawitdem » Mon Feb 05, 2024 9:30 am America/New_York

We have now 12.5mx12.5m all over the world, what will be the next resolution?

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ASF - bhauer
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Re: The next resolution

by ASF - bhauer » Mon Feb 05, 2024 2:29 pm America/New_York

The DEM file included with the ALOS PALSAR RTC product .zip file is a copy of an open-source DEM that was downloaded, modified, and used to perform radiometric terrain correction (RTC) on an ALOS PALSAR granule. The height values of the modified DEM differ from the source DEM because an ellipsoid correction was applied before it was used for RTC. These files are not intended to be used in place of a standard DEM product but are included to assist in interpreting/evaluating the RTC products.

The sources of the DEMs downloaded and used for this project vary depending on the location of the PALSAR granule. Details about the DEMs used and the modifications applied are available here:
https://asf.alaska.edu/information/palsar-rtc-dem-information/

Note that the DEM file used for RTC is resampled to match the pixel spacing of the PALSAR source file, so the pixel spacing does not necessarily reflect the resolution of the source DEM.

General information about the ALOS PALSAR RTC products is available here:
https://asf.alaska.edu/data-sets/derived-data-sets/alos-palsar-rtc/alos-palsar-radiometric-terrain-correction/
Bill Hauer
Alaska Satellite Facility DAAC
User Support Office
uso@asf.alaska.edu

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