Search found 1448 matches

by OB.DAAC - SeanBailey
Thu May 18, 2023 3:30 pm America/New_York
Forum: Questions/Comments
Question: Level 1&2 browser - scenes not available for ordering
Replies: 2

Re: Level 1&2 browser - scenes not available for ordering

Fabio, This issue is related to the change in filename for the MLAC data with the recent reprocessing. Unfortunately, there is no longer a direct link (by way of the filename) between the L1 files and the L2 files and the old browser was expecting that, at least for the data ordering. Unfortunately,...
by OB.DAAC - SeanBailey
Thu May 18, 2023 8:44 am America/New_York
Forum: Questions/Comments
Question: SeaDAS cannot reproduce OBPG l2 product
Replies: 3

Re: SeaDAS cannot reproduce OBPG l2 product

Make sure you are using the same ancillary inputs that were used in the OBPG processing. With NRT files, the OBPG processes with the best available at the time of processing. If you process a file later, is it possible - actually quite likely - that the ancillary files obtained via getanc will not b...
by OB.DAAC - SeanBailey
Thu May 18, 2023 8:28 am America/New_York
Forum: Questions/Comments
Question: PIC netCDF files - scale and offset values for pic variable
Replies: 2

Re: PIC netCDF files - scale and offset values for pic variable

The data are stored as signed short integers, so, if you are seeing floating point values, the function you used to read the PIC product applied the scale and offset values. The scale_factor and add_offset values are applied to the data using this simple equation: geophysical_value = scale_factor * ...
by OB.DAAC - SeanBailey
Mon May 15, 2023 1:23 pm America/New_York
Forum: Questions/Comments
Question: SeaWiFS L1a and L2 Filename Datetime Discrepancy
Replies: 2

Re: SeaWiFS L1a and L2 Filename Datetime Discrepancy

The issue stems from how the filenames are defined, and for SeaWiFS this most impacts the MLAC data. MLAC are merged files with all of the HRPT (direct broadcast) and on board recorded LAC (local area coverage) data. When the MLAC files were developed, we needed a way to ensure we didn't have duplic...
by OB.DAAC - SeanBailey
Thu May 04, 2023 7:58 am America/New_York
Forum: Questions/Comments
Question: Loading "Aqua MODIS Global Binned Chlorophyll (CHL) Data, version R2022.0" into ArcGIS
Replies: 4

Re: Loading "Aqua MODIS Global Binned Chlorophyll (CHL) Data, version R2022.0" into ArcGIS

The binned file format is not a raster format and cannot be read by GIS tools...it's also not a 3D product, rather it is essentially spreadsheet... it's complicated ;) . However, the mapped product that we distribute (which are generate from the binned product) are 2D rasters that can be loaded into...
by OB.DAAC - SeanBailey
Tue May 02, 2023 11:59 am America/New_York
Forum: Questions/Comments
Question: Significant errors in ocean data
Replies: 1

Re: Significant errors in ocean data

The cause has been identified and corrected. Reprocessed imagery should be available in Worldview soon.

Regards,
Sean
by OB.DAAC - SeanBailey
Tue May 02, 2023 11:58 am America/New_York
Forum: Questions/Comments
Question: L2 Sea Surface Temperature Unusable
Replies: 1

Re: L2 Sea Surface Temperature Unusable

The cause has been identified and corrected. Reprocessed imagery should be available in Worldview soon.

Regards,
Sean
by OB.DAAC - SeanBailey
Fri Apr 14, 2023 3:29 pm America/New_York
Forum: Questions/Comments
Question: Question About Chlorophyll Concentration Disparity
Replies: 7

Re: Question About Chlorophyll Concentration Disparity

I did not mean to suggest that the sensor degradation was the sole reason for differences you see between Hawkeye and MODIS-Aqua. In fact, most of the degradation occurred during the extended commissioning phase. While the instrument likely continues to degrade, the rate of change over time is much ...
by OB.DAAC - SeanBailey
Thu Apr 13, 2023 8:26 am America/New_York
Forum: Questions/Comments
Question: Dealing with the negative Rrs values in NASA OC products
Replies: 1

Re: Dealing with the negative Rrs values in NASA OC products

Negative Rrs retrievals is the result of an atmospheric correction issue, most often an over estimate of the atmospheric aerosol contribution. Negative TOA reflectance, well that's just bad data. It should not be a common situation. If you are finding it to be more than an extremely rare condition, ...
by OB.DAAC - SeanBailey
Wed Apr 05, 2023 3:20 pm America/New_York
Forum: Questions/Comments
Question: max number of PACE products processed by l2bin
Replies: 1

Re: max number of PACE products processed by l2bin

Bruce, I don't have an answer for you except to say that getting the binner to be happy with the insane number of products that OCI will produce is actively being worked :). I do know that there was a memory issue that was identified and resolved, perhaps that was affecting your processing. This and...