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Dear Sir or Madam, I am working with the MOD09A1 v 6.1 product over the Arctic Ocean. I am particularly using bands 1, 2 and 3 of the product. Especially in band 2 I encountered many negative reflectance values over open water. The same pixels are however valid in the other bands. Is there any sugge...

I downloaded them from https://e4ftl01.cr.usgs.gov/MOLT/MOD09A1.061/ and apply a re-projection to EPSG:3413 before mosaicing them. The same procedure works well for the rest of the time series, this is why I am wondering.
All the Best,
Niklas

Thank you for your patience. For the mosaic shown in the previous post, I used the following tiles: MOD09A1.A2001177.h09v02.061.2020062152629.hdf MOD09A1.A2001177.h10v02.061.2020062152731.hdf MOD09A1.A2001177.h11v01.061.2020062153126.hdf MOD09A1.A2001177.h11v02.061.2020062153214.hdf MOD09A1.A2001177...

Dear Danielle, thank you for your message. Please find an image of an Arctic-wide mosaic of MOD09A1 data acquired on 2001-06-26 attached to this mail. I also uploaded the original hdf files to ftp.awi.de/public/nneckel/MODIS/2020-06-26. For downloading please use the ftp settings attached. Kind Rega...

Dear all,

I am searching the archives for the MOD09A1 product with starting date 2001-06-18 which is somehow missing (in both versions V006 and V061) at USGS and NASA archives also 2001-06-26 seems to be corrupted. Are these known issues? Can anybody help me with this?

Kind regards,

Niklas