Search found 181 matches

by avmehta
Tue Nov 24, 2020 4:19 pm America/New_York
Forum: Questions/Comments
Question: MODIS Data download
Replies: 4

MODIS Data download

Hi,
  I had requested spatially subsetted MODIS data - but could not download it or extend the download deadline on time. Now the files are removed. Is there anyway I can request the data again? I am sorry about the inconvenience. 
Thanks.
Amita
by avmehta
Wed Nov 04, 2020 2:35 pm America/New_York
Forum: Questions/Comments
Question: MODIS GEO file
Replies: 13

MODIS GEO file

Hello,    I am using modis_GEO.py  with L1A MODIS file to get a GEO file. For many files I get the following error:     Percent valid data (0.00) is less than threshold (95.00)     ERROR: MODIS geolocation processing failed.   I am trying to fin...
by avmehta
Tue Oct 27, 2020 11:44 pm America/New_York
Forum: Questions/Comments
Question: maskcloud
Replies: 2

maskcloud

Hello,     I am running l2gen to get L1 to L2 for OLCI images. I have set maskcloud=0 in my parameter file but where CLDICE mask is present I get all Rhos as NaN but just Rhos_940 has values! At certain locations Rhos_490 has negative values! Just when I think I have things somewhat f...
by avmehta
Sat Oct 24, 2020 9:33 am America/New_York
Forum: Questions/Comments
Question: Flags and Reprojected files
Replies: 12

Flags and Reprojected files

Thanks Sean. That is exactly what I was asking.
I appreciate your help and patience  with my questions.
Amita
by avmehta
Fri Oct 23, 2020 5:04 pm America/New_York
Forum: Questions/Comments
Question: Flags and Reprojected files
Replies: 12

Flags and Reprojected files

HI Sean,
   If I remove the conditions (i.e. have no maskExpression) I get an error.
   So which ever flag is excluded during reprojection - pixels with those flags will be excluded correct?
Thanks.
Amita
by avmehta
Fri Oct 23, 2020 2:26 pm America/New_York
Forum: Questions/Comments
Question: Flags and Reprojected files
Replies: 12

Flags and Reprojected files

Hello,    When I reproject OLCI L2 files I find that in some cases original L2 files look fine but reprojected files are  NaN over water at most locations! I use geographic reprojection  and bilinear resampling. I got the par file  and xml file from gpt Cookbook website:pixe...
by avmehta
Wed Oct 21, 2020 10:06 am America/New_York
Forum: Questions/Comments
Question: Reprojecting L1 image
Replies: 1

Reprojecting L1 image

Hello,     I have been processing L1 to L2 for MODIS (250 m), OLCI, OLI, and MSI. I first extract the region of interest from L1 image then use l2gen to get L2 images. FInally I reproject the L2 images using gpt.   I was wondering if I can reproject L1 images first and the u...
by avmehta
Tue Oct 20, 2020 2:46 pm America/New_York
Forum: Questions/Comments
Question: Flags and Reprojected files
Replies: 12

Flags and Reprojected files

Thanks you Sean.
Amita
by avmehta
Tue Oct 20, 2020 2:31 pm America/New_York
Forum: Questions/Comments
Question: Flags and Reprojected files
Replies: 12

Flags and Reprojected files

Hello,   In my l2gen caluclations for L1 to L2 conversion of OLCI image I am setting cloudmask=0 as we want to decide our own threshold for clouds. But in my l2flag array I still see pixels are flagged with CLDICE! Is there anything else I have to specify or turnoff in l2gen inout paramete...
by avmehta
Mon Oct 19, 2020 10:43 pm America/New_York
Forum: Questions/Comments
Question: Flags and Reprojected files
Replies: 12

Flags and Reprojected files

Yes, I thought that reprojection of flags would no make sense - but thanks you so much confirming,  Danny.
Amita