Search found 71 matches

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...
by zhigang
Tue Jan 31, 2017 9:01 am 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

Dear Aynur,
The input file size is ~48M, which exceeds sever nasa.gov(xx.xxx.xx.xx) limit, the mail was rejected by server.
And, how can I send the input file to you ?

Regards,
zhigang
by zhigang
Tue Jan 31, 2017 8:05 am 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 Aynur. The result generated by mosaic tool though GUI is OK. Actually, this problem is common for those data after 2006, yet the results for those data in 2002-2005 are OK, I don't know why.Due to the input file size is large, I will send the data to your e-mail box (aynur.abdurazik@nasa....