Search found 57 matches

by OB.DAAC - SeanBailey
Fri Sep 12, 2025 10:25 am America/New_York
Forum: Home
Question: SeaDAS new l2gen very slow
Replies: 16

Re: SeaDAS new l2gen very slow

Yes, a test tag with this fix is being prepped and should be available sometime next week. It will take a little longer to get into a release tag, but as SeaDAS is planning another release in October, it shouldn't be too long of a wait :D

Regards,
Sean
by OB.DAAC - SeanBailey
Thu Sep 11, 2025 10:05 am America/New_York
Forum: Home
Question: SeaDAS new l2gen very slow
Replies: 16

Re: SeaDAS new l2gen very slow

Roger,

Yep, that was discovered recently by Alex as well and will be corrected in an upcoming release. The wee bit o'code whoopsie that caused the woe was introduced in August 2024 (in the source code),which jives with Fred's report that the slowness began with V2025.1.

Regards,
Sean
by OB.DAAC - SeanBailey
Thu Sep 11, 2025 9:39 am America/New_York
Forum: Home
Question: Trouble accessing OPeNDAP to download PACE data
Replies: 2

Re: Trouble accessing OPeNDAP to download PACE data

Yes, this was a temporary issue. The service has been restored.
Regards,
Sean
by OB.DAAC - SeanBailey
Thu Aug 28, 2025 9:14 am America/New_York
Forum: Home
Question: MODIS-Aqua L2 (1 km)
Replies: 1

Re: MODIS-Aqua L2 (1 km)

You can use Earthdata Search to identify and retrieve the data or your region of interest. The following link will take you to the OB.DAAC portal and display the MODIS L2 collections: https://search.earthdata.nasa.gov/search?portal=obdaac&fi=MODIS&fl=2%2B-%2BGeophys.%2BVariables%252C%2BSenso...
by OB.DAAC - SeanBailey
Fri Aug 22, 2025 11:56 am America/New_York
Forum: Home
Question: l3bin fails with error code -11 when there are 475 input files
Replies: 2

Re: l3bin fails with error code -11 when there are 475 input files

The l3bin code is some old code and sets up a number of static arrays with what is normally enough space to do its work...and as such it has a hard-coded file limit of 256. Line 26 of l3bin.cpp : #define MAXNFILES 256 I suppose it could be recompiled setting that #define to 512...it should work... (...
by OB.DAAC - SeanBailey
Tue Aug 19, 2025 2:26 pm America/New_York
Forum: Home
Question: PACE Rrs products in the NIR bands (720-895 nm)
Replies: 2

Re: PACE Rrs products in the NIR bands (720-895 nm)

Masud, Unfortunately, the l2gen code has a hard limit of 720nm for Rrs output. It has to do with the way the atmospheric correction process works. We have been mulling over the possibility of expanding the output for PACE-OCI, since it does have bands longer than 720nm that are not used in the aeros...
by OB.DAAC - SeanBailey
Thu Jul 31, 2025 8:35 am America/New_York
Forum: Home
Question: PACE-OCI and Aqua-MODIS FLH algorithms and validations
Replies: 3

Re: PACE-OCI and Aqua-MODIS FLH algorithms and validations

Fundamentally, the current FLH algorithm is the same for MODIS and OCI. OCI just has more bands for deriving the baseline from which the line height is computed. A more sophisticated approach that takes advantage of the high spectral sampling of OCI in the chlorophyll a fluorescence region is planne...
by OB.DAAC - SeanBailey
Wed Jul 30, 2025 12:44 pm America/New_York
Forum: Home
Question: seadas processing modifies modis L1A input files, is this normal?
Replies: 1

Re: seadas processing modifies modis L1A input files, is this normal?

It is normal and intended for MODIS and has been the case since before Terra launched in 1999. Though not how I would have written the code :D , the files need to be writeable. It is only metadata that is modified, not the DNs, so mostly harmless. Different code is used for VIIRS - one that doesn't ...
by OB.DAAC - SeanBailey
Thu Jul 24, 2025 10:28 am America/New_York
Forum: Home
Question: PACE OCI_IOP
Replies: 2

Re: PACE OCI_IOP

Clouds, glint and dust. These are challenging regions during those months and such factor as those I listed affect all ocean color products (from all missions, not just PACE).

Sean
by OB.DAAC - SeanBailey
Wed Jul 23, 2025 12:05 pm America/New_York
Forum: Home
Question: PACE V3 L2_AOP sensor_band_parameter group gone
Replies: 5

Re: PACE V3 L2_AOP sensor_band_parameter group gone

The bands in the spectral region at the overlap between the two spectrographs in the PACE OCI instrument are not included in the v3.0 L2 products. In the v3.0 release notes, it states: Data in the transition region between the red and blue focal planes, between 590 and 610nm, often shows significant...