Search found 74 matches

by zhigang
Thu Mar 08, 2018 2:25 am America/New_York
Forum: Home
Question: Cropp and reproject problems with output format
Replies: 5

Cropp and reproject problems with output format

As Danny said, the reprojection can only identify the file generated by l2gen, you cannot use the cropping file to make reprojection. Actually, the reprojection is slow for an entire image than a cropping file. I suggested that you can generated a regional file of L2_LAC_OC.nc via adapting the subse...
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...