Search found 708 matches

by gnwiii
Thu May 11, 2023 10:45 am America/New_York
Forum: Home
Question: Cannot find band information in file created using ncl
Replies: 2

Re: Cannot find band information in file created using ncl

I created nc file, which contains average of MODIS-A 8-day composite data files, using ncra (ncl average function). But I am the new file doesn't show any band in SeaDAS because of which I am unable get the data map in SeaDAS. The file has the information because I am able to plot it in all the oth...
by gnwiii
Wed May 03, 2023 1:10 pm America/New_York
Forum: Home
Question: Loading "Aqua MODIS Global Binned Chlorophyll (CHL) Data, version R2022.0" into ArcGIS
Replies: 4

Re: Loading "Aqua MODIS Global Binned Chlorophyll (CHL) Data, version R2022.0" into ArcGIS

It is said "Aqua MODIS Global Binned Chlorophyll (CHL) Data, version R2022.0" has a netCDF4 (.nc) format. I am using a large amount of your other spatial datasets which have a ".nc". format. I can normally load those data into ArcGIS (ArcMap) by using its "Multidimension To...
by gnwiii
Thu Apr 20, 2023 7:06 pm America/New_York
Forum: Home
Question: cannot use Seadas GUI but work for command line
Replies: 11

Re: cannot use Seadas GUI but work for command line

OB SeaDAS - xuanyang02 wrote: Wed Mar 22, 2023 3:54 pm America/New_York Are you running SeaDAS on MacOS Ventura?

Currently, both SeaDAS and SNAP have issues with Ventura.

See viewtopic.php?t=3850
A user found a workaround for SNAP on Ventura <https://forum.step.esa.int/t/toolbar-issue-on-macos-ventura/37760/42>.
by gnwiii
Tue Mar 14, 2023 1:23 pm America/New_York
Forum: Home
Question: l2gen atmospheric correction with mask
Replies: 9

Re: l2gen atmospheric correction with mask

longest wrote: Sat Mar 11, 2023 9:03 pm America/New_York.
For some reason, different bands lose different pixels.
It is not unusual to get invalid results (e.g., negative values for bands where water is “dark” but atmospheric contribution is high) for some but not all bands.
by gnwiii
Fri Mar 10, 2023 2:29 pm America/New_York
Forum: Home
Question: l2gen atmospheric correction with mask
Replies: 9

Re: l2gen atmospheric correction with mask

I'm interested in water pixels, but there are many missing pixels of inshore waters after l2gen atmospheric correction, as shown in the image, which bothers me. So I'm looking for all the pixels of the l2gen atmospheric correction. Inland waters are the hardest case as you can have high levels of s...
by gnwiii
Thu Mar 09, 2023 7:40 pm America/New_York
Forum: Home
Question: l2gen atmospheric correction with mask
Replies: 9

Re: l2gen atmospheric correction with mask

When I used the GUI interface of OCSSW for atmospheric correction of MODIS and Landsat images with the l2gen procedure, I made the land and cloud mask options turn off, but there were still only water pixels. I wonder why? How can I get all the pixels after atmospheric correction? Are you intereste...
by gnwiii
Thu Mar 09, 2023 12:32 pm America/New_York
Forum: Home
Question: SeaDAS
Replies: 2

Re: SeaDAS

Why does it show No appropriate product reader found when I open this "TERRA_MODIS.20190930T160001.L2.OC.nc" with SeaDAS8.3.0.,Thanks everythone. You should check that the download is not corrupt. You don't mention your platform. On POSIX systems (linux, maxOS) you can run "type TERR...
by gnwiii
Wed Mar 01, 2023 12:37 pm America/New_York
Forum: Home
Question: Color Scales
Replies: 3

Re: Color Scales

the color scale as shown on Ocean Color Web goes up to 60 mg/m^3, but in the SeaDAS program, the scale's limit is 20 mg/m^3. Which scale is accurate, and how come they are different? The choice of scale depends on the data. As noted by @xuanyang02 , you can make your own choice, although there are ...
by gnwiii
Mon Feb 27, 2023 11:14 am America/New_York
Forum: Home
Question: opendap issues (I think)
Replies: 5

Re: opendap issues (I think)

I no longer get the many lines error report, but do still see (note the spelling change (edlided-->elided):

Code: Select all

:data_bins = "Attribute elided: Unsupported attribute type (NC_INT64)" ;
What is "data_bins"? Is it ever used with mapped data?
by gnwiii
Wed Feb 15, 2023 8:12 am America/New_York
Forum: Home
Question: Problems in updating LUTs and installing OCSSW processor
Replies: 8

Re: Problems in updating LUTs and installing OCSSW processor

Running the following code in the terminal doesn't give any error. /usr/bin/env python3 -c "import requests" However, running this in the terminal, install_ocssw zsh: command not found: install_ocssw Problems like this are all too common. It is difficult to provide a recipe that works for...