[GRASS-user] i.atcorr for GeoEye-1 and Worldview-3

[Nick Ves]

​​
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 <
mlennert at club.worldonline.be> wrote:

> On 04/06/15 21:13, Nikos Alexandris wrote:
>
>> * Markus Neteler <neteler at osgeo.org> [2015-06-04 20:52:54 +0200]:
>>
>>  On Thu, Jun 4, 2015 at 2:19 PM, Moritz Lennert
>>> <mlennert at club.worldonline.be> 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
>
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