ACOLITE forum

Hi Quinten, Thanks for your suggestion. Yes, your suggestion also works fine for other images in 2020-2021. I am confused that ACOLITE with defaulting settings work fine for Landsat except for data in May-July of 2020 and 2021. I might need to use dsf_aot_estimate=fixed to reprocess all images from ...

Hi Quinten, I am using ACOLITE to process the Landsat series images in a mountain lake (Mono Lake). However, I found that there are a lot of negative rhos values in Landsat-8 OLI from May to July in 2020-2021. Other images in the period of 1984-2023 are normal. For those pixels with negative rhos, I...

Hi Quinten, Thanks for your fast reply. Yes, I often see the updates of ACOLITE respository. Thanks for your efforts in developing it. Your information should be enough for me to run ACOLITE. Regarding the NOAA CLASS, I remember we need to select the SDR (i.e., L1B) dataset (I used it about in 2015....

Hi Quinten, I am excited to see that ACOLITE adds the support of VIIRS. I would like to inquire what the input of ACOLITE for VIIRS is, is it NOAA CLASS (with imaging bands) or NASA Oceancolor disributed M-bands? I am interested in examining the ability of DSF algorithm on VIIRS to compare other alg...

Congrats! Thanks for your share, Quinten! Best Regards--Zhigang

Hi Quiten, Thanks for you mention! ACOLITE does have keywords to correct the atmosphere pressure. I specified the dem_pressure=True , yet the results were still negative. And, the elevation=1946 (in m) and dem_pressure=True did not work as well. Finally, when I used elevation=1946 and dem_pressure=F...

Hi Quinten, I am generating the Rrs of Landsat-8 OLI in a clear lake (38N, 119W) using the ACOLITE distributed in github. However, the Rrs at 443 nm and 483 nm were negative generated by both DSF and EXP method. At the same time, I used the SeaDAS to process the same image based on the NIR-SWIR (865...

Hi Quinten,

Yes, the keyword is very flexible for every user, and I expected the next release. Thanks for your efforts for it.

Best Regards,
Zhigang

I have some ideas about the ACOLITE outputs, they are only for references and may be not totally correct. :D (1) Outputs are the L1R, L2R and L2W, these 3 files may be merged as one file, the L2R always includes L1R (rhot_*) and L2W is just masked surface reflectances and water quality. (2) File siz...

Hi Quinten, I cannot obtain the ancillary data successfully with this command. Internet is a exactly BIG problem for us. Proxy is a good way to access the web via browser, but it usually does have a problem to access the data with terminal/Python. In fact, it took me much time to make it work in the...