Search found 148 matches

by avmehta
Wed Mar 03, 2021 4:39 pm America/New_York
Forum: All Questions/Comments
Question: OLCI and MODIS data processing
Replies: 0

OLCI and MODIS data processing

Hello, This is in continuation of my Q/A with the OC Forum about using gpt to mosaic MODIS and OLCI images. In the end I started using IDL because while gpt provides mean reflectances we are interested in composting 7-day images to find mean, minimum and median reflectances for a region. Since I wan...
by avmehta
Mon Feb 22, 2021 10:15 am America/New_York
Forum: All Questions/Comments
Question: gpt MosaicGeneral
Replies: 7

gpt MosaicGeneral

Hi,
The xml file does not like && ! Any way I am  going to use IDL to do mosaics as I want minimum, mean, and median values  for the mosaics.
Thanks for your help.
Amita
by avmehta
Thu Feb 18, 2021 12:40 pm America/New_York
Forum: All Questions/Comments
Question: gpt MosaicGeneral
Replies: 7

gpt MosaicGeneral

Thanks so much Danny - will try this.
Amita
by avmehta
Wed Feb 17, 2021 9:39 am America/New_York
Forum: All Questions/Comments
Question: gpt MosaicGeneral
Replies: 7

gpt MosaicGeneral

Thank you so much.
Amita
by avmehta
Wed Feb 17, 2021 12:45 am America/New_York
Forum: All Questions/Comments
Question: gpt MosaicGeneral
Replies: 7

gpt MosaicGeneral

Hello,  Could you please  explain the following segment in the xml file from https://seadas.gsfc.nasa.gov/help/GptCookbook/gptCookbookMosaic.html    <conditions>            <condition>                <name>cond...
by avmehta
Tue Feb 16, 2021 2:23 pm America/New_York
Forum: All Questions/Comments
Question: gpt MosaicGeneral
Replies: 21

gpt MosaicGeneral

I am not using GUI -- in GUI I see NaNs!
In the Parameter file is there way to fix this?
Thanks for your help.
Amita
by avmehta
Mon Feb 15, 2021 10:04 am America/New_York
Forum: All Questions/Comments
Question: gpt MosaicGeneral
Replies: 21

gpt MosaicGeneral

Thanks. Here is a portion of what I get after I use gpt to mosaic files:metadata:Processing_Graph:node_0:parameters:orthorectify = "false" ;                metadata:Processing_Graph:node_0:parameters:combine = "OR" ;      ...
by avmehta
Sat Feb 13, 2021 1:23 pm America/New_York
Forum: All Questions/Comments
Question: gpt MosaicGeneral
Replies: 21

gpt MosaicGeneral

I just look at ncdump of the L2 nc file.
Thanks.
Amita
by avmehta
Fri Feb 12, 2021 12:30 pm America/New_York
Forum: All Questions/Comments
Question: gpt MosaicGeneral
Replies: 21

gpt MosaicGeneral

In the GUI I can see NaN where there is no data (Rhos =0  there show up as NaN) it is the NetCDF file that they stay 0s and no appear as NaN. I tried a number (-9999) instead of NaN but that does not work either!
Thanks much for your help.
Amita
by avmehta
Fri Feb 12, 2021 9:44 am America/New_York
Forum: All Questions/Comments
Question: gpt MosaicGeneral
Replies: 21

gpt MosaicGeneral

Hello George,  Thank you for the explanation. What I want to do is exclude land and cloud pixels from mosaic/composite and then set rhos to NaN or some missing value number if the value is 0. My par file looks like this:band1=rhos_412band1Expression=if (rhos_412 != 0) then rhos_412 else NaNqual...