Reprojecting L1 image

Please enter here to ask a question about any NASA Science related topics!
Post Reply
avmehta
Posts: 150
Joined: Mon Feb 03, 2020 10:27 am America/New_York

Reprojecting L1 image

by avmehta » Wed Oct 21, 2020 10:06 am America/New_York

Hello,
     I have been processing L1 to L2 for MODIS (250 m), OLCI, OLI, and MSI. I first extract the region of interest from L1 image then use l2gen to get L2 images. FInally I reproject the L2 images using gpt.
   I was wondering if I can reproject L1 images first and the use l2gen to get L2 images.  Is that better in any way?
Thanks.
Amita

Tags:

OB SeaDAS - knowles
Subject Matter Expert
Subject Matter Expert
Posts: 224
Joined: Mon Apr 07, 2008 4:40 pm America/New_York

Reprojecting L1 image

by OB SeaDAS - knowles » Wed Oct 21, 2020 10:22 am America/New_York

No, you cannot reproject L1 images and then run l2gen.  All the science processors within the OCSSW menu are strict science data processors with specific input file types and formats, tracking through specific science data levels.  The other more generic GUI/GPT tools such as Reproject, Subset, Collocate, etc. are not part of OCSSW.  So you cannot use the output of the non-OCSSW tools as input to the OCSSW software.

Note that there are "reproject" tools within OCSSW.  This would involve taking the level-2 file and running it through l2bin and then through l3mapgen.

Danny

Post Reply