<div dir="ltr"><div class="gmail_default" style="font-family:tahoma,sans-serif;display:inline"></div>Take note for WV3 [0] digital globe states that<br><div class="gmail_default" style="font-family:tahoma,sans-serif;display:inline"></div>"<br> 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 [...].<br><br><b><div class="gmail_default" style="font-family:tahoma,sans-serif;display:inline"></div>DigitalGlobe has developed proprietary algorithms that use these atmospheric measurements to normalize WorldView-3 imagery for consistency</b>. This normalization is called atmospheric compensation, which is especially important for information extraction, such as change detection and vegetation analysis because changes <b><div class="gmail_default" style="font-family:tahoma,sans-serif;display:inline"></div>due to the <div class="gmail_default" style="font-family:tahoma,sans-serif;display:inline"></div>atmosphere have been removed</b>.<div class="gmail_default" style="font-family:tahoma,sans-serif;display:inline"></div><div><div class="gmail_default" style="font-family:tahoma,sans-serif;display:inline">"</div></div><div><div class="gmail_default" style="font-family:tahoma,sans-serif;display:inline"><br></div></div><div><div class="gmail_default" style="font-family:tahoma,sans-serif;display:inline">Which seems to imply that their (of-the-shelf) products are already cleaned from any atmospheric artistic.</div></div><div><font face="tahoma, sans-serif"><br></font></div><div><font face="tahoma, sans-serif"><div class="gmail_default" style="font-family:tahoma,sans-serif;display:inline">Further confirmation on that would I think is needed.</div><br></font><br>[0] <a href="https://www.digitalglobe.com/sites/default/files/DG_Pixels_to_Products_forWeb.pdf">https://www.digitalglobe.com/sites/default/files/DG_Pixels_to_Products_forWeb.pdf</a></div><div class="gmail_extra"><br><div class="gmail_quote">On Fri, Jun 5, 2015 at 10:43 AM, Moritz Lennert <span dir="ltr"><<a href="mailto:mlennert@club.worldonline.be" target="_blank">mlennert@club.worldonline.be</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><span class="">On 04/06/15 21:13, Nikos Alexandris wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
* Markus Neteler <<a href="mailto:neteler@osgeo.org" target="_blank">neteler@osgeo.org</a>> [2015-06-04 20:52:54 +0200]:<br>
<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
On Thu, Jun 4, 2015 at 2:19 PM, Moritz Lennert<br>
<<a href="mailto:mlennert@club.worldonline.be" target="_blank">mlennert@club.worldonline.be</a>> wrote:<br>
...<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
Do I understand correctly that you would need the numbers behind the<br>
curves in this document:<br>
<br>
<br>
<a href="https://www.digitalglobe.com/sites/default/files/DigitalGlobe_Spectral_Response_1.pdf" target="_blank">https://www.digitalglobe.com/sites/default/files/DigitalGlobe_Spectral_Response_1.pdf</a><br>
</blockquote></blockquote></blockquote>
<br>
Yes, exactly - we would need the original values which were used to produce:<br>
<br>
Figure 6. Spectral Response of the WorldView-3 panchromatic and<br>
multispectral imagery, visible and near infrared bands.<br>
<br>
<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
I don't have the time to do this now, but using something like [1], it<br>
should be easy to quickly get an approximate dataset from the graphs in that<br>
document.<br>
</blockquote>
<br>
Maybe with a little more crowd-hunting or by someone just contacting<br>
DigitalGlobe we would get the table of values right away?<br>
</blockquote>
<br>
I tried to contact DigitalGlobe in the past about WV2. I did not<br>
succeed back then. Maybe now if someone has recently bought some WV3<br>
imagery.<br>
</blockquote>
<br></span>
Is this data confidential ? I would imagine that for DigitalGlobe it is an advantage if software can use their products, or ?<span class="HOEnZb"><font color="#888888"><br>
<br>
Moritz</font></span><div class="HOEnZb"><div class="h5"><br>
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