Search found 71 matches

by zhigang
Sun Feb 04, 2024 12:50 am America/New_York
Forum: Home
Question: failed in getanc for modis data
Replies: 3

Re: failed in getanc for modis data

Hi Sean,

Appreciated! I had reverted ocssw to the older version (V2021.1) and it worked. I will be able to try your solution for V2023.3 later.

Best,
Zhigang
by zhigang
Fri Feb 02, 2024 12:04 pm America/New_York
Forum: Home
Question: failed in getanc for modis data
Replies: 3

failed in getanc for modis data

Dear all, I have not used seadas for about one year and re-instailled it to process some modis aqua data with l2gen (ocssw V2023.3). However, the getanc did not work. The detail of error was: getanc -cv /home/ubuntu/data/NorthA/tmp/A2002243182000.L1B_LAC ancillary_data.db Searching database: /home/u...
by zhigang
Tue Apr 26, 2022 9:37 pm America/New_York
Forum: Home
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: Home
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: Home
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: Home
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: Home
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: Home
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
Wed Jul 21, 2021 1:05 am America/New_York
Forum: Home
Question: how to remove bowtie for VIIRS imagery in SeaDAS
Replies: 6

Re: how to remove bowtie for VIIRS imagery in SeaDAS

Thanks George.
by zhigang
Mon Jul 19, 2021 9:24 pm America/New_York
Forum: Home
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...