Search found 1449 matches

by OB.DAAC - SeanBailey
Wed Sep 27, 2017 7:56 pm America/New_York
Forum: Questions/Comments
Question: Featured images
Replies: 10

Featured images

Kim,Norman will probably respond, but likely not refer to it as magic...but I do :grin:Way back in the distant past, Norman posted a "how-to" on one of his bits of SeaWiFS magic.His magicians top hat has added more fairy dust over the years, but the the basics are there.He also responded t...
by OB.DAAC - SeanBailey
Mon Sep 25, 2017 12:36 pm America/New_York
Forum: Questions/Comments
Question: Change to data file search?
Replies: 2

Change to data file search?

The previous non-interactive usage works with the new API, and our FAQ on the topic has been updated.  We'll see about adding a pointer to it on the interactive page :grin:

Sean
by OB.DAAC - SeanBailey
Mon Sep 25, 2017 11:14 am America/New_York
Forum: Questions/Comments
Question: No data for PAR products L2
Replies: 4

No data for PAR products L2

The problem is that there was an error in the definition of the valid_max metadata parameter for the PAR product that has since been rectified.  The data processed prior to the implementation of the fix have an incorrect valid_max value.  See:  https://oceancolor.gsfc.nasa.gov/forum/o...
by OB.DAAC - SeanBailey
Wed Sep 20, 2017 9:03 pm America/New_York
Forum: Questions/Comments
Question: Real variable values in l3mapgen geotiff output
Replies: 2

Real variable values in l3mapgen geotiff output

We chose to NOT put the scale factor for the geotiff output when the indexed color palette is used, as the scaling would be rather coarse, so yes with the palette applied the tif should be used just for visualization.   However, if you set apply_pal=0, l3mapgen will generate a floating-poi...
by OB.DAAC - SeanBailey
Wed Sep 20, 2017 2:19 pm America/New_York
Forum: Questions/Comments
Question: A brief OBPG network outage on 21 September 2017
Replies: 0

A brief OBPG network outage on 21 September 2017

OBPG/OB.DAAC users, We have been informted that a network group upstream of the OBPG/OB.DAAC will be performing maintenance on our network connection on Thursday, 21 September 2017 between 19:00 and 20:00 EDT. During that time window, there will be a brief network outage. All network traffic in and ...
by OB.DAAC - SeanBailey
Mon Sep 18, 2017 7:13 pm America/New_York
Forum: Questions/Comments
Question: seadas 7.4, update_luts.py
Replies: 21

seadas 7.4, update_luts.py

Ana,Do not be discouraged but these failures.  While we have tried to make the process easy, network issues can be confounding.   Retry.  Most cases the process will pick up where it left off.  A new install of Ubuntu 16.04 should work, as it is the OS we develop on ...and i...
by OB.DAAC - SeanBailey
Fri Sep 15, 2017 11:15 am America/New_York
Forum: Questions/Comments
Question: Processing of Level 2 MODIS Rrs 11000 and 12000
Replies: 2

Processing of Level 2 MODIS Rrs 11000 and 12000

The l2gen code will not output emissive bands  as remote sensing reflectance, because, well, they are emissive bands not reflective bands.
Try BT_11000 to retrieve the brightness temperature.

Sean
by OB.DAAC - SeanBailey
Thu Sep 14, 2017 6:28 pm America/New_York
Forum: Questions/Comments
Question: Using l2_flags for MODIS Aqua and VIIRS
Replies: 2

Using l2_flags for MODIS Aqua and VIIRS

1 & 2) No.Both MODIS and VIIRS (in fact all the L2 files we distribute) are generated using the same code (l2gen).  There is a common file format, and thus a common l2_flag array.Obviously, for all but VIIRS the BOWTIEDEL flag is not set.3)The new "flags" in the SeaDAS GUI are gen...
by OB.DAAC - SeanBailey
Thu Sep 14, 2017 6:09 pm America/New_York
Forum: Questions/Comments
Question: Study of coastal water turbidity in Réunion Island
Replies: 4

Study of coastal water turbidity in Réunion Island

The standard MODIS L2 files we produce are (nominally) 1km resolution.  While they do have the 645nm Rrs data, to get the 250m resolution you would have to process the L1 files to L2 locally and set resolution=250We do not provide a quai-true color image in any of our products.  You can ge...
by OB.DAAC - SeanBailey
Tue Sep 12, 2017 8:06 am America/New_York
Forum: Questions/Comments
Question: OCI algorithm and OCx algorithm
Replies: 7

OCI algorithm and OCx algorithm

Yeah, I suppose that can be confusing...especially when I mistype 667 as 671 (got VIIRS on the brain) ;)MODIS *has* 555, but for the ocean color world it's green band is 547 (also listed elsewhere as 551 - the spec doesn't match reality).The 555nm band is a "land" band, with a lowe...