Search found 73 matches

by zhigang
Tue Feb 27, 2018 12:21 am America/New_York
Forum: Home
Question: Clipping of MODIS L3m file according to Shapefile
Replies: 5

Clipping of MODIS L3m file according to Shapefile

It seems to be in late March this year, but I'm not sure :)
by zhigang
Sun Jul 23, 2017 2:29 am America/New_York
Forum: Home
Question: OLCI support disappeared?
Replies: 5

OLCI support disappeared?

Now, as they said, the GUI hasn't support processing of OLCI. You should process OLCI in command-line mode like its installation.
For example, you can use 'l2gen ifile=xfdumanifest.xm ofile=.....'(see the help of l2gen) in terminal in Linux or Mac OS.

Regards
zhigang
by zhigang
Thu Jun 15, 2017 11:25 pm America/New_York
Forum: Home
Question: getanc.py is failed for Landsat8 OLI
Replies: 1

getanc.py is failed for Landsat8 OLI

Dear everyone,       A granule of OLI data was downloaded from USGS (new website) named :LC08_L1TP_119038_20170527_20170527_01_RT_MTL.txt. However, I can't download the ancillary files by GUI and getanc.py. The message was:ERROR: For LC08_L1TP_119038_20170527_20170527_01_RT_M...
by zhigang
Mon Mar 06, 2017 2:15 am America/New_York
Forum: Home
Question: Batch processing Landsat with l2gen
Replies: 5

Batch processing Landsat with l2gen

You can use one programming language(shell or python) to implement a batch processing, for OLI, this task is similar with MODIS. Here is my idea:(1) to put all files into same folder.(2) using a loop statement(do,while, for, etc.) to read filename one by one, then you can use this as input to execut...
by zhigang
Mon Mar 06, 2017 1:39 am America/New_York
Forum: Home
Question: How to calculate the transmittance according to the aerosol Luts(dtran_a,dtran_b...)
Replies: 2

How to calculate the transmittance according to the aerosol Luts(dtran_a,dtran_b...)

Yes, I have found it from aerosol.c file.
Regards,
zhigang
by zhigang
Wed Mar 01, 2017 4:12 am America/New_York
Forum: Home
Question: How to calculate the transmittance according to the aerosol Luts(dtran_a,dtran_b...)
Replies: 2

How to calculate the transmittance according to the aerosol Luts(dtran_a,dtran_b...)

As the title, I have using the wavelength and view geometry to get the dtran_a and dtran_b, but I don't know how using these data to generate the transmittance. Are there some equations or scripts?

Regards,
zhigang
by zhigang
Mon Feb 20, 2017 12:53 am America/New_York
Forum: Home
Question: Can't access the website of data processing components by distributed separately
Replies: 2

Can't access the website of data processing components by distributed separately

Yes, it works when switching the http to https. I appreciate that you give me lots of valuable information. Looking forward to the release of next version SeaDAS.

Regards,
zhigang
by zhigang
Sun Feb 19, 2017 2:53 am America/New_York
Forum: Home
Question: Can't access the website of data processing components by distributed separately
Replies: 2

Can't access the website of data processing components by distributed separately

Dear everyone,I remembered the processing component for OLCI (SEN-3A) was separately released as a test version, now I want to use it to process some OCLI data in terminal window. However, I can not access the website of data processing components now(http://oceandata.sci.gsfc.nasa.gov/ocssw/). Was ...
by zhigang
Tue Jan 31, 2017 9:54 pm America/New_York
Forum: Home
Question: The result of Mosaic is too small generated by gpt.sh
Replies: 7

The result of Mosaic is too small generated by gpt.sh

Thanks George, the problem has been solved according to your recommendation. I had thought the pixel resolution was determined automatically like the reprojection tool, but that was wrong. I must assign a fixed value to execute mosaic oration, if not, the default pixel resolution 0.05 would be adopt...
by zhigang
Tue Jan 31, 2017 9:35 pm America/New_York
Forum: Home
Question: The result of Mosaic is too small generated by gpt.sh
Replies: 7

The result of Mosaic is too small generated by gpt.sh

Hi Aynur,The problem has been fixed according to George's recommendation. I thought the pixel resolution was determined automatically according to different sensors(250m,300m,30m etc.) like the reproject operation. Now the mosaic works well. A file including the input file name and parameters fo...