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Lunar radiance removal

PostPosted: Mon Oct 15, 2018 2:44 pm
by leonidas
How can I remove lunar radiance from VIIRS DNB files?
I have already converted hdf5/SDR files to geotiffs using satpy.

Re: Lunar radiance removal

PostPosted: Sat Feb 16, 2019 2:19 pm
by leonidas
I have found Cao's method [1] which is based on Spectral Lunar Ιrradiance model (MT2009) [2].
I tried that but I end up with an overcorrection...
Did anyone try that formula?


[1] Cao, C., Shao, X., & Uprety, S., Detecting Light Outages After Severe Storms Using the S-NPP/VIIRS Day/Night Band Radiances, IEEE Geoscience and Remote Sensing Letters, 10(6), 1582–1586 (2013). http://dx.doi.org/10.1109/LGRS.2013.2262258

[2] Miller, S., & Turner, R., A Dynamic Lunar Spectral Irradiance Data Set for NPOESS/VIIRS Day/Night Band Nighttime Environmental Applications, IEEE Transactions on Geoscience and Remote Sensing, 47(7), 2316–2329 (2009). http://dx.doi.org/10.1109/TGRS.2009.2012696

Re: Lunar radiance removal

PostPosted: Mon Mar 04, 2019 10:30 am
by davidh
Leonidas,

We talked a little on the pytroll slack. What you are trying to do (correcting DNB for lunar radiance) is not something our team is actively trying to accomplish. Additionally, I am just a programmer and don't do research with the data we create software for. I would suggest contacting the people whose papers you linked to to discuss possible solutions. If there is something CSPP LEO or Polar2Grid or SatPy can do to make this research easier, let me know.

Dave

Re: Lunar radiance removal

PostPosted: Thu Mar 07, 2019 5:51 am
by leonidas
David,
Thank you for your clarification and your contribution! I have already contacted them. I haven't received a response. Thanks again!

Re: Lunar radiance removal

PostPosted: Wed Dec 18, 2019 3:32 am
by onion5376
Hi, leonidas
Recently, I also try to process viirs DNB data. The problem "how to remove lunar radiance" stuck with me long time too. Do you have dealt with it? In addition, I also find that the satpy package in python can be used to process DNB data. But, I did not get some examples about processing this data in satpy, would you give me some help?

Best wishes, onion

Re: Lunar radiance removal

PostPosted: Sat Oct 17, 2020 3:36 am
by riskov
who was able to solve this problem?

Re: Lunar radiance removal

PostPosted: Mon Oct 19, 2020 10:22 am
by leonidas
riskov wrote:who was able to solve this problem?

Please take a look at:
https://ieeexplore.ieee.org/document/9151187
https://www.spiedigitallibrary.org/conf ... hort?SSO=1