Search found 71 matches

by zhigang
Fri Jul 16, 2021 2:46 am America/New_York
Forum: Home
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: Home
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...
by zhigang
Wed May 26, 2021 11:11 am America/New_York
Forum: Home
Question: confusion to the transmittances in calculating rhos using SeaDAS
Replies: 2

Re: confusion to the transmittances in calculating rhos using SeaDAS

Thanks for your reply, Minwei.--zhigang
by zhigang
Mon May 24, 2021 10:20 pm America/New_York
Forum: Home
Question: confusion to the transmittances in calculating rhos using SeaDAS
Replies: 2

confusion to the transmittances in calculating rhos using SeaDAS

Hi, In the old post of ocean color forum (https://oceancolor.gsfc.nasa.gov/forum/oceancolor/topic_show.pl?tid=2229), I learn about that SeaDAS made adjustments for variours transmittances in calculating rhos (surface reflectance): rhos = PI / F0 / mu0 * (Lt / tg_sol / tg_sen - Lr) / t_sol / t_sen / ...
by zhigang
Tue Feb 23, 2021 8:27 pm America/New_York
Forum: Home
Question: where is the location of gpt.sh or alternatives in seadas8
Replies: 2

where is the location of gpt.sh or alternatives in seadas8

Thanks Aynur! Looking forward to the next version!

Regards,
Zhigang
by zhigang
Mon Feb 22, 2021 9:26 pm America/New_York
Forum: Home
Question: where is the location of gpt.sh or alternatives in seadas8
Replies: 2

where is the location of gpt.sh or alternatives in seadas8

Hi All,Excited to see the updates of seadas 8, appereciated your dedicated works!I used the gpt.sh or gpt.command to make some post-processing for the MODIS and VIIRS data, however, I cannot find it in the $HOME/bin or other directory now, resulting in my codes did not work. Although the SNAP provid...
by zhigang
Fri Aug 28, 2020 11:03 am America/New_York
Forum: Home
Question: Trouble with WSL installation
Replies: 1

Trouble with WSL installation

I have installed SeaDAS in WSL2 successfully! You should give more details of installation.
For installing java8, you can see:Install java8 on ubuntu 20.04.
Regarding the requirements of SeaDAS, you can see here: https://seadas.gsfc.nasa.gov/requirements/

-Zhigang
by zhigang
Sat Aug 08, 2020 2:33 pm America/New_York
Forum: Home
Question: how to reduce the size of files generated by l2gen
Replies: 6

how to reduce the size of files generated by l2gen

Thanks, George! I got a new skill to check out file information in the shell terminal. - Zhigang
by zhigang
Sat Aug 08, 2020 2:29 pm America/New_York
Forum: Home
Question: how to reduce the size of files generated by l2gen
Replies: 6

how to reduce the size of files generated by l2gen

Hi Sean,

Thanks for your solutions, it is what I want to do. Because I need to generate many products from one whole granule imagery to further process using my programs so that I must consider the disk space in a big ROI.

This XML file works perfectly!:grin:

Thank you again!

Regards,
Zhigang
by zhigang
Wed Aug 05, 2020 11:16 pm America/New_York
Forum: Home
Question: how to reduce the size of files generated by l2gen
Replies: 6

how to reduce the size of files generated by l2gen

Thanks, George. I did use the HDF5 and the file includes the Rrs, rhos, and view geometries. I will try to use NetCDF.

Thank you, again!

Regards,
Zhigang