Search found 72 matches

by zhigang
Tue Apr 26, 2022 9:37 pm America/New_York
Forum: Questions/Comments
Question: Mismatch between input geographic limits and output of l2gen for MODISA using V2022.0
Replies: 10

Re: Mismatch between input geographic limits and output of l2gen for MODISA using V2022.0

Hi Daniel,

Did you examine the subset options in V2022.1? I have a l2 file generated in V2022.1:

https://drive.google.com/file/d/1BE_D0MqYvtva9l9Yx5YEfCeWhFoMlLqU/view

which includes all inputs used in the processing.

Same configuration worked in V2021.1 but failed in V2022.1.

Regards,
Zhigang
by zhigang
Wed Apr 13, 2022 10:50 pm America/New_York
Forum: Questions/Comments
Question: Mismatch between input geographic limits and output of l2gen for MODISA using V2022.0
Replies: 10

Re: Mismatch between input geographic limits and output of l2gen for MODISA using V2022.0

I reverted the V2021.1, it works now. I am not sure whether I wrongly set V2022.0 or this version has potential bugs.
by zhigang
Wed Apr 13, 2022 11:10 am America/New_York
Forum: Questions/Comments
Question: Mismatch between input geographic limits and output of l2gen for MODISA using V2022.0
Replies: 10

Mismatch between input geographic limits and output of l2gen for MODISA using V2022.0

Hi, Recently, I am confused about MODISA processing using V2022.0 OC processors. Here is an example: I set the south=30.9, north=31.09, west=82.1, east=82.3 in l2gen to process A2002274073500.L1B_LAC. But output level-2 product is in lat=<20.28, 20.29>, lon=<91.96, 91.97>. The input boundary was mis...
by zhigang
Wed Aug 11, 2021 11:09 pm America/New_York
Forum: Questions/Comments
Question: invalid south-west-north-east settings in V2021.2 ocssw
Replies: 3

Re: invalid south-west-north-east settings in V2021.2 ocssw

Thanks, I am still using V2021.1 piror to the realease of next version. --Zhigang
by zhigang
Wed Aug 11, 2021 11:06 pm America/New_York
Forum: Questions/Comments
Question: l2gen boundary arguments not working in SeaDAS8.1
Replies: 4

Re: l2gen boundary arguments not working in SeaDAS8.1

Brian, you could revert it to the previous version (V2021.1), it works well. -- Zhigang
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by zhigang
Wed Jul 21, 2021 9:40 am America/New_York
Forum: Questions/Comments
Question: how to remove bowtie for VIIRS imagery in SeaDAS
Replies: 6

Re: how to remove bowtie for VIIRS imagery in SeaDAS

Fortunately, it is easy to use the GPF when SNAP was installed in the same system. I will try it later :).
by zhigang
Mon Jul 19, 2021 9:24 pm America/New_York
Forum: Questions/Comments
Question: how to remove bowtie for VIIRS imagery in SeaDAS
Replies: 6

Re: how to remove bowtie for VIIRS imagery in SeaDAS

Yes, I would like to improve the appearance thourough filling those deleted pixels at the edges of scans. I processed the data using the ocssw in Ubuntu 18.04. I found that the data generated by l2gen without subset options could get beautiful image after reprojection. But the results with subset op...
by zhigang
Fri Jul 16, 2021 2:46 am America/New_York
Forum: Questions/Comments
Question: how to remove bowtie for VIIRS imagery in SeaDAS
Replies: 6

how to remove bowtie for VIIRS imagery in SeaDAS

Greetings, I am processing some VIIRS data in SeaDAS with V2021.1 processor. The input data is L1A and GEO data downloaded from the ocean color portal. However, the result processed by l2gen missed some data, which should related to the bowtie effect. I have tried to map it using reproject and mosai...
by zhigang
Fri Jun 25, 2021 10:52 am America/New_York
Forum: Questions/Comments
Question: invalid south-west-north-east settings in V2021.2 ocssw
Replies: 3

invalid south-west-north-east settings in V2021.2 ocssw

Hi, I updated my ocssw to V2021.2 recently in Ubuntu 20.04. I found the l2gen could not process the region of interest in MODIS Aqua imagery using south-west-north-east parameters. For example, the command such as l2gen ifile= A2020366063500.L1B_LAC geofile=A2020366063500.GEO ofile=A2020366063500_l2...