Forum

Yves, While it is true that we produce and distribute remote sensing reflectance data for MODIS that include the higher spatial resolution bands (469nm, 555, and 645nm), none of the ocean color products we produce use bands other than the nominal 1km spatial resolution ("ocean") bands. For...

For efficient storage. A 16bit integer takes less space to store than a 32bit float.

Sean

The measurement of chlorophyll concentration is indeed a volumetric measurement, thus the units of milligrams per cubic meter. The algorithm employed can relate the observed surface reflectance spectrum to a chlorophyll concentration as it was developed using coincident in situ measurements of remot...

SeaDAS does not support OCM3.

Sean

Yes, rhos is Rayleigh corrected reflectance.

Sean

You seem to be attempting to process a L2 file. This will not work, as l2gen expects a L1 file as input.

Sean

Fabio, When the Hu algorithm is above 0.25 mg m^-3, but below 0.35 mg m^-3, we blend Hu with OCx. As Lachlan pointed out: The decision point in the function chl_oci that selects chl_hu, chl_ocx, or a blend of the two, is dependent only the magnitude of chl_hu (i.e., chl1). The code is correct. Sean

Julien,

Indeed, there is a discrepancy with the VIIRS PIC flaguse parameter. The good news is that the impact is insignificant. There is an extremely small number of pixels flagged as ATMWARN that are not also flagged by another of the flags in use as masks for the product.

Regards,
Sean

Sami, Geolocation of the Hawkeye imagery is a bit of a challenge: https://oceancolor.gsfc.nasa.gov/data/hawkeye/geolocation/ While we do our best to minimize the geolocation errors, we cannot completely eliminate them. Some scenes are worse than others. (or if you take an optimistic view, some scene...

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,...