Question about PACE V3 reprocessing

[slsmit34]

Hello,
I am trying to understand the changes that PACE OCI Level-2 AOP V3.0 has undergone. From OB.DAAC (https://oceancolor.gsfc.nasa.gov/data/reprocessing/V3.0/pace/), I have gathered that these are the key changes:

• 1.application of system vicarious calibration gains

• 2.correction for residual sensitivity through polarization models.

• 3. improvement to the BRDF algorithm

Is this correct?

Also, I can access Version 3.0 data dating back to 1/1/2025, but I heard that historical V2.0 is expected to be back-processed in the future. Is this true?

P.S. V3.0 looks great! It is performing much better in the blue range for coastal waters.

Best,
Sami

[OB ODPS - towens]

The full mission back to 05-Mar-2024 was reprocessed with V3.0 in January. Where are you looking that you don't see it available?

Tommy

[slsmit34]

Hi Tommy,
Thanks for the help. I see on the Earthdata portal that the Temporal Extent is '2024-03-05 ongoing,' but when I query results in the Chesapeake Bay through the portal, there are no resulting granules:

ED_Browser.PNG (325.65 KiB) Not viewed yet

I also get no granules when running earthaccess on Python:

EA_code.PNG (46.75 KiB) Not viewed yet

Note: the same code and variables (boundary, tspan) have granules for version = '2.0'. I can also retrieve V3.0 scenes from this code from 1/1/2025 onwards.

Best,
Sami

[OB ODPS - towens]

Your query is looking for Near Real Time (NRT) granules in a time range when there are only Refined granules available. The refined period is 05-mar-2024 through 31-Jan-2025. If you remove the "_NRT" from the collection name, you will be querying the correct collection.

Tommy