Earthdata Forum

Hi,

I am working on HICO images around Venice Bay.
I downloaded and processed L1b (.h5) data for the region using SeaDAS v.7.5.1 on macOS and l2gen.
It seems that .h5 files for 2014 have wrong coordinates, while the .nc files are ok, however l2gen cannot handle these .nc files.

Attached are two L1b images I created with SeaDAS to exemplify the error. The pin corresponds to the position of the AERONET-OC Tower.

Apart for this issue, can I expect  .h5 and .nc files to be exactly the same?

Thank you,
Mariana

Mariana,

Yes, the HDF5 (.h5) versions of the HICO data suffer from some navigation issues.
The new netCDF files have an adjustment that should significantly improve the
navigation of the data (although there may still be some error).  The calibration of the
data should be the same.  There may have be some minor differences, but nothing that
would be significant. 

An upcoming release of SeaDAS will have support the the new netCDF format files.

Sean

Thank you Sean

Hi again,

I saw in the old HICO website that there are ways to improve the geolocation.

Do you think this is still the best way to do it? I could not find the rad_geom file in the HICO data.

Or do you know when the upcoming SeaDAS will be released?

Mariana

Mariana,The instructions on the old HICO website were for using the BIL files in ENVI.  That won't work for either the HDF5 or the netCDF4 files we distribute.
SeaDAS does have a ground control point navigation feature that can be used to adjust the navigation of individual scenes.We expect to release the next version of SeaDAS in mid-December 2018...so not long now Sean

great! thanks