Sentinel-3A GetANC Problem
Posted: Sun May 17, 2026 2:31 am America/New_York
When I use OCSSW to invert Sentinel-3A L1B files to L2, I find that the results of using the `getanc` command are always:
OBPG session started
Downloading xfdumanifest.anc.server ( 0.00 MBs)
[==================================================]
...Done
*** WARNING: No optimal MET files found.
*** WARNING: No optimal OZONE files found.
*** WARNING: No optimal SST files found.
*** WARNING: No optimal ICE files found.
When I use the SeaDAS GUI and click the “Get Anc” button directly, there is no response. As a result, the Chla coverage in the L2 product I inverted is significantly lower than that of the official L2 product downloaded directly. I’ve seen others on the forum reporting issues with `getanc`. I’d like to ask: is this a problem with our code usage, or is it a common issue with the `getanc` system? If it is a code usage issue, how can we correctly obtain the relevant files and use them for processing?
OBPG session started
Downloading xfdumanifest.anc.server ( 0.00 MBs)
[==================================================]
...Done
*** WARNING: No optimal MET files found.
*** WARNING: No optimal OZONE files found.
*** WARNING: No optimal SST files found.
*** WARNING: No optimal ICE files found.
When I use the SeaDAS GUI and click the “Get Anc” button directly, there is no response. As a result, the Chla coverage in the L2 product I inverted is significantly lower than that of the official L2 product downloaded directly. I’ve seen others on the forum reporting issues with `getanc`. I’d like to ask: is this a problem with our code usage, or is it a common issue with the `getanc` system? If it is a code usage issue, how can we correctly obtain the relevant files and use them for processing?