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Ideally, that would be the case, if you are asking me is it more necessary for that purpose then it is with others, I am not sure. But undoubtedly the more accurate Surface Reflectance value is with the lower Aerosol level. One of the inherent issues with daily data is to find the balance between se...

Hi Silvia, First, we apologize for the version discrepancies. We did here back from the LDOPE folks at MODAPS who develop the production algorithms and process the data. They felt that it was due to more stringent sun angle criteria that was used with for V061 processing. They also verified that thi...

Hello, Sorry for the delay. We wanted to get confirmation about this from the PI/Developer of the MAIAC product because Band 4, 11, and 12 fall with in the green wavelength. He did confirm what we suspected, it is Band 4 that is aligned with the MCD19A2 optical_depth_550. Please let us know if you h...

Hi Zhou,
It is recommended to use the Cloud State, as that is more definitive. Also, It contains, cloud mask from MOD35 and cloud/snow/aerosol/fire/shadow etc as determined by the reflectance algorithm. Hence users are encouraged to use the state flag from the MOD09GA.
Thanks,
Brett

Hi Q, Please remove the spaces and the quotation marks and I think it will work, with one condition. I discovered that Earthdata will only allow 5 granules at a time to be searched this way. When I put the entire list in it gave me this error: Error retrieving granules The query contained [26] condi...

Hi, Can I point you in a little different direction. We have seen this issue with the Earthdata Search before when users try to subset. We are the LPDAAC, so the data comes from us, but the Earthdata Search is out of our control. Can you try our AppEEARS tool: https://appeears.earthdatacloud.nasa.go...

Hi, LAI_Charts_China.PNG I processed February 1 through June 30 from 2012-2023 in our AppEEARS tool and they seem consistent, so at least there is no dramatic spike or drop from year to year, but the highest value I see is 2.3. The vast majority are between 0.5 and 1.5, so the issue is should they b...

Hello,
Could you send the search parameters you are using and also copy and paste the script? We would like to emulate exactly what what you are doing.
Thanks,
Brett

Hello,
Could you give me some specific examples. Like the H/V Lat/long range and date, then we could look at specific examples. Also, did you get a chance to look at the QC bits to see if those would indicate what may be wrong with the pixels?
Thanks,
Brett

Hi Zhou,
Yes, that is what I would suggest, treating them like fill value. Certainly don't use those particular pixels for scientific research.
Thanks,
Brett