Search found 181 matches

by avmehta
Wed Aug 26, 2020 2:51 pm America/New_York
Forum: Questions/Comments
Question: OLI L2 data
Replies: 6

OLI L2 data

Hello,  I have been processing a number of OLI images using l2gen. I have a couple of issues/questions: 1)When I visualize the L2 images the mask manager panel is blank! 2) When I display the l2flag raster I see a number  2112 -- I don't know what this number represents! The output L2 ...
by avmehta
Sun Aug 23, 2020 10:44 am America/New_York
Forum: Questions/Comments
Question: L2gen processing speed
Replies: 8

L2gen processing speed

Thanks Danny.
Amita
by avmehta
Thu Aug 20, 2020 10:45 am America/New_York
Forum: Questions/Comments
Question: L2gen processing speed
Replies: 8

L2gen processing speed

Hello,
   I have a question about  MODIS L1/L2 data. Is it possible to use MODIS 250m data to derive L2 (Rrs, Rhot, Ch-a, and SST)?  Would SeaDAS/OCSSW/l2gen work for that?
Thank you.
Amita
by avmehta
Tue Aug 04, 2020 12:45 pm America/New_York
Forum: Questions/Comments
Question: Sentinel 3B OLCI EFR data
Replies: 2

Sentinel 3B OLCI EFR data

Hi,
  It is working now! Thank you.
Amita
by avmehta
Sat Aug 01, 2020 1:52 pm America/New_York
Forum: Questions/Comments
Question: Sentinel 3B OLCI EFR data
Replies: 2

Sentinel 3B OLCI EFR data

Hello,  I am trying to download Sentinel 3 OLCI EFR (L1) data from the OceanColor Level 1 & 2 Browser . It works fine with Sentinel 3A but not for 3B.  I use 'Order Data' and expect to get a list of URLs to download data -- this works for 3A but I keep seeing  'Redirec...
by avmehta
Thu Jul 09, 2020 4:29 pm America/New_York
Forum: Questions/Comments
Question: HICO L-2 Processing
Replies: 11

HICO L-2 Processing

Thanks much Sean.I am  running l2gen for HICO  on  SeaDAS GUI. I see the absc_gas.nc file on my Mac in /seadas-7.5.3/ocssw/share/hico directory.I moved the file to /seadas-7.5.3/ocssw/share/common where atrem_angle_limit.nc is and just got read before I get the 'No such file or di...
by avmehta
Wed Jul 08, 2020 6:10 pm America/New_York
Forum: Questions/Comments
Question: HICO L-2 Processing
Replies: 11

HICO L-2 Processing

Hello,   I am using l2gen to get HICO L2 data.  My question is about 'Derived Geophysical Parameters'. Are all the options valid for HICO? Also, I see multiple algorithm options for certain parameters -- e.g. Kd 490, sst, Zsd (Sechhi Depth).  Is there any default recommen...
by avmehta
Tue Jun 23, 2020 12:33 pm America/New_York
Forum: Questions/Comments
Question: Level-2 Coordinates
Replies: 3

Level-2 Coordinates

Thanks Norman. I have another question I'd appreciate help with. I have installed OCSSW to process  a number of sensors. If I add a new sensor, do I have to re-install it for all the sensors? To be specific I installed OCSSW for MODIS, OLCI, OLI, MSI. Now I want to add VIIRS and HICO -- so ...
by avmehta
Sat Jun 20, 2020 7:50 pm America/New_York
Forum: Questions/Comments
Question: Level-2 Coordinates
Replies: 3

Level-2 Coordinates

Hello,    I am trying to match  pixel location in  OLI, OLCI, and MSI Level-2 image with in-situ data. I colocate according to latitude-longitude of the in situ point measurements data and the lat-lon arrays available in the L2 images. My question is, do I have to re-project the ...
by avmehta
Mon Jun 08, 2020 4:18 pm America/New_York
Forum: Questions/Comments
Question: getanc.py
Replies: 12

getanc.py

Hello,
     I have a question about l2gen output file. In the L2 netcdf output file I see longitudes slon, clon, and elon. And similar for latitude. I use clon and clat of each pixel as geolocation of that pixel when using in calculations. Is this a correct assumption?
Thanks.
Amita