Search found 69 matches

by zhigang
Mon Feb 22, 2021 9:26 pm America/New_York
Forum: Questions/Comments
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: Questions/Comments
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: Questions/Comments
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: Questions/Comments
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: Questions/Comments
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
by zhigang
Wed Aug 05, 2020 2:33 pm America/New_York
Forum: Questions/Comments
Question: how to reduce the size of files generated by l2gen
Replies: 6

how to reduce the size of files generated by l2gen

Hi all,I am looking for a solution to reduce the file size when I process the MODIS data using l2gen. As you know, one whole granule of MODIS L2 data including the Rrs at all wavelengths is about 500M or even more, so that a long-time series requires a big space to store them. I am wondering whether...
by zhigang
Wed Aug 05, 2020 2:26 pm America/New_York
Forum: Questions/Comments
Question: gpt.sh reprojection issue
Replies: 3

gpt.sh reprojection issue

Hi Jun,

You may try to use the Mosaic tool via gpt.sh, it is able to generate images with the same sizes. A GPT Cookbook including Mosaic can be found in SeaDAS help document.

Regards,
Zhigang
by zhigang
Mon Jul 15, 2019 1:23 am America/New_York
Forum: Questions/Comments
Question: issue: chl_hu: incompatible sensor wavelengths for this algorithm for l7etm
Replies: 5

issue: chl_hu: incompatible sensor wavelengths for this algorithm for l7etm

Thanks, Rakesh. I will try it, and I do believe that it can avoid the Chl_hu problem.
But, there are also some problems for Rayleigh-Luts of L7ETM, which results in uncorrect Lr (for example, Lr>Lt).
Maybe, for this problem, we should expect the next release of SeaDAS.:grin:

Best Regards,
Zhigang
by zhigang
Thu Jun 20, 2019 11:29 pm America/New_York
Forum: Questions/Comments
Question: climatology
Replies: 2

climatology

you can try l2bin and l3mapgen.
by zhigang
Tue Jun 11, 2019 1:21 am America/New_York
Forum: Questions/Comments
Question: issue: chl_hu: incompatible sensor wavelengths for this algorithm for l7etm
Replies: 5

issue: chl_hu: incompatible sensor wavelengths for this algorithm for l7etm

Hi Don,Exactly. after all, the landsat 5 and landsat 7 is not very suitable for the ocean color, and I just wanna test these two bundles.:grin:Also, the values of rhos_478 and rhos_560 derived the landsat 7 were negative for my tested images (LE07_L1TP_119038_20181216_20190111_01_T1 and LE07_L1TP_11...