PACE OCI Feature at ~690nm
Posted: Sun Jan 18, 2026 3:13 pm America/New_York
I am analyzing a number of PACE AOP granules, Level 2 v3, e.g. PACE_OCI.20240708T202028.L2.OC_AOP.V3_0.nc
and am seeing significantly negative Rrs values at ~690nm (see Attachments).
I expect it is a mis-correction of the O2 B-Band in the atmospheric corrections.
If so, is there a mitigation?
Especially troublesome is that the Rrs uncertainty is very small at these wavelengths, i.e. the negative values are >5 sigma departures from 0. This implies the data are highly confident to have measured negative Rrs (non-physical).
Thanks!
X
and am seeing significantly negative Rrs values at ~690nm (see Attachments).
I expect it is a mis-correction of the O2 B-Band in the atmospheric corrections.
If so, is there a mitigation?
Especially troublesome is that the Rrs uncertainty is very small at these wavelengths, i.e. the negative values are >5 sigma departures from 0. This implies the data are highly confident to have measured negative Rrs (non-physical).
Thanks!
X