Take note for WV3 [0] digital globe states that " WorldView-3 addresses this problem by being the first commercial imaging satellite with an atmospheric sensor as part of its payload. During image capture, the WorldView-3 atmospheric sensor is designed to detect the presence of clouds, aerosols and water vapor at 31 meter resolution, thereby measuring the exact atmospheric conditions corresponding to every recorded image [...].
*DigitalGlobe has developed proprietary algorithms that use these atmospheric measurements to normalize WorldView-3 imagery for consistency*. This normalization is called atmospheric compensation, which is especially important for information extraction, such as change detection and vegetation analysis because changes *due to the atmosphere have been removed*. " Which seems to imply that their (of-the-shelf) products are already cleaned from any atmospheric artistic. Further confirmation on that would I think is needed. [0] https://www.digitalglobe.com/sites/default/files/DG_Pixels_to_Products_forWeb.pdf On Fri, Jun 5, 2015 at 10:43 AM, Moritz Lennert < [email protected]> wrote: > On 04/06/15 21:13, Nikos Alexandris wrote: > >> * Markus Neteler <[email protected]> [2015-06-04 20:52:54 +0200]: >> >> On Thu, Jun 4, 2015 at 2:19 PM, Moritz Lennert >>> <[email protected]> wrote: >>> ... >>> >>>> Do I understand correctly that you would need the numbers behind the >>>>>> curves in this document: >>>>>> >>>>>> >>>>>> >>>>>> https://www.digitalglobe.com/sites/default/files/DigitalGlobe_Spectral_Response_1.pdf >>>>>> >>>>> >>> Yes, exactly - we would need the original values which were used to >>> produce: >>> >>> Figure 6. Spectral Response of the WorldView-3 panchromatic and >>> multispectral imagery, visible and near infrared bands. >>> >>> >>> I don't have the time to do this now, but using something like [1], it >>>> should be easy to quickly get an approximate dataset from the graphs in >>>> that >>>> document. >>>> >>> >>> Maybe with a little more crowd-hunting or by someone just contacting >>> DigitalGlobe we would get the table of values right away? >>> >> >> I tried to contact DigitalGlobe in the past about WV2. I did not >> succeed back then. Maybe now if someone has recently bought some WV3 >> imagery. >> > > Is this data confidential ? I would imagine that for DigitalGlobe it is an > advantage if software can use their products, or ? > > Moritz > > _______________________________________________ > grass-user mailing list > [email protected] > http://lists.osgeo.org/mailman/listinfo/grass-user >
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