SeaDAS versioning affecting Landsat chl processing
Posted: Fri Jul 01, 2022 2:34 pm America/New_York
Hi all,
I am trying to process a Landsat 8 L1 image for chlorophyll in l2gen from the command line, but I am getting different errors based on the version of SeaDAS I have installed.
With SeaDAS R2022.5 installed, I get:
"Loading aerosol models from
-E- /home/dshea/ocssw/src/l2gen/aerosol.c: Error opening file _r30f95v01.hdf."
With SeaDAS T2022.14 installed (was installed to separately process a L9 L1B file), I get:
"Loading aerosol models from /scratch/coast/seadas/ocssw/share/oli/l8/aerosol/aerosol_olil8
Number of Wavelengths 8
Number of Solar Zenith Angles 33
Number of View Zenith Angles 35
Number of Relative Azimuth Angles 19
Number of Scattering Angles 75
Number of Diffuse Transmittance Wavelengths 8
Number of Diffuse Transmittance Zenith Angles 33
Number of aerosol LUT wavelengths (8) is not equal to number of sensor wavelengths (7)."
With SeaDAS R2022.3 installed, it works, and says:
"Loading aerosol models from /scratch/coast/seadas/ocssw/share/oli/aerosol/aerosol_oli
Number of Wavelengths 7
Number of Solar Zenith Angles 33
Number of View Zenith Angles 35
Number of Relative Azimuth Angles 19
Number of Scattering Angles 75
Number of Diffuse Transmittance Wavelengths 7
Number of Diffuse Transmittance Zenith Angles 33
Wavelengths - Sensor Aerosol model Diffuse transmittance
443.00 443.00 443.00
482.00 482.00 482.00
561.00 561.00 561.00
655.00 655.00 655.00
865.00 865.00 865.00
1609.00 1609.00 1609.00
2201.00 2201.00 2201.00
Limiting aerosol models based on RH.
Using Gordon & Wang aerosol model selection
and NIR correction with up to 10 iterations
Using bands at 865.0 and 1609.0 nm for model selection
Extrapolating from 1609.0 nm
80 aerosol models: 8 humidities x 10 size fractions"
What is going on here?
Ideally, I would have the latest version installed in order to process both L8 and L9 imagery, but I would also like to know what is happening with the aerosol correction. I have also been getting significantly different chl_oci chlorophyll concentrations based on whether I am using Landsat Collection 1 or 2 L1B files, which I am troubleshooting with Nima. Any advice on what is causing this issue and what I should do to get good chlorophyll output would be greatly appreciated. Thank you!!
Luke Carberry
I am trying to process a Landsat 8 L1 image for chlorophyll in l2gen from the command line, but I am getting different errors based on the version of SeaDAS I have installed.
With SeaDAS R2022.5 installed, I get:
"Loading aerosol models from
-E- /home/dshea/ocssw/src/l2gen/aerosol.c: Error opening file _r30f95v01.hdf."
With SeaDAS T2022.14 installed (was installed to separately process a L9 L1B file), I get:
"Loading aerosol models from /scratch/coast/seadas/ocssw/share/oli/l8/aerosol/aerosol_olil8
Number of Wavelengths 8
Number of Solar Zenith Angles 33
Number of View Zenith Angles 35
Number of Relative Azimuth Angles 19
Number of Scattering Angles 75
Number of Diffuse Transmittance Wavelengths 8
Number of Diffuse Transmittance Zenith Angles 33
Number of aerosol LUT wavelengths (8) is not equal to number of sensor wavelengths (7)."
With SeaDAS R2022.3 installed, it works, and says:
"Loading aerosol models from /scratch/coast/seadas/ocssw/share/oli/aerosol/aerosol_oli
Number of Wavelengths 7
Number of Solar Zenith Angles 33
Number of View Zenith Angles 35
Number of Relative Azimuth Angles 19
Number of Scattering Angles 75
Number of Diffuse Transmittance Wavelengths 7
Number of Diffuse Transmittance Zenith Angles 33
Wavelengths - Sensor Aerosol model Diffuse transmittance
443.00 443.00 443.00
482.00 482.00 482.00
561.00 561.00 561.00
655.00 655.00 655.00
865.00 865.00 865.00
1609.00 1609.00 1609.00
2201.00 2201.00 2201.00
Limiting aerosol models based on RH.
Using Gordon & Wang aerosol model selection
and NIR correction with up to 10 iterations
Using bands at 865.0 and 1609.0 nm for model selection
Extrapolating from 1609.0 nm
80 aerosol models: 8 humidities x 10 size fractions"
What is going on here?
Ideally, I would have the latest version installed in order to process both L8 and L9 imagery, but I would also like to know what is happening with the aerosol correction. I have also been getting significantly different chl_oci chlorophyll concentrations based on whether I am using Landsat Collection 1 or 2 L1B files, which I am troubleshooting with Nima. Any advice on what is causing this issue and what I should do to get good chlorophyll output would be greatly appreciated. Thank you!!
Luke Carberry