| l1bgen_generic | ![]() |
Creates a Level 1B file from an input Level 1A file.
Location
Details
Command Line Usage
SeaDAS-Toolobox -> SeaDAS Processors -> l1bgen_generic
l1bgen_generic reads in a SeaWiFS Level-1A file (HRPT, LAC, or GAC) and generates a L1B file by applying the sensor calibration at the same resolution and location as the Level-1A data.
![]() |
| UI Element Name | Type | Description | Required/Optional | Default Value |
| ifile | ifile | Input Level-1A data product. | Required | |
| ofile | ofile | Output filename for generated Level-1B data product. | Required | |
| calfile | ifile | system calibration file | Optional | |
| xcalfile | ifile | cross-calibration file | Optional | |
| spixl | int | Starting pixel number to be processed. | Optional | 1 |
| epixl | int | Ending pixel number to be processed. (-1=the last pixel). | Optional | -1 |
| sline | int | start line number | Optional | 1 |
| eline | int | end line number (-1=the last line) | Optional | -1 |
| gain | float | calibration gain multiplier | Optional | |
| offset | float | calibration offset adjustment | Optional | |
| sl_pixl | int | SeaWiFS only, number of LAC pixels for straylight flagging. | Conditional | -1 |
| sl_frac | float | SeaWiFS only, straylight fractional threshold on Ltypical. | Conditional | 0.25 |
| pversion | string | Processing version string | Optional | Unspecified |
| suite | string | product suite string for loading suite-specific defaults | Optional | OC |
| UI Element Name | Type | Description |
| Browser Button | Button | Selects ifile/ofile |
| Load Parameters ... | Button | Reads in previously saved parameters and populates the fields in GUI. |
| Store Parameters ... | Button | Saves the current arguments in GUI in a file. |
| Run | Button | Executes the l1bgen_generic command with arguments provided in the UI. |
| Cancel | Button | Closes current processor GUI. |
| Apply | Button | Makes current arguments effective. |
| Open in SeaDAS | Checkbox | If selected, the ofile will be added to the open products list right after its generation. |
| ? | Button | Displays the help content of the current command. |
l1bgen_generic 9.6.0-V2022.1 (Nov 17 2022 15:35:31)
Usage: l1bgen_generic argument-list
The argument-list is a set of keyword=value pairs. The arguments can
be specified on the commandline, or put into a parameter file, or the
two methods can be used together, with commandline over-riding.
return value: 0=OK, 1=error, 110=north,south,east,west does not intersect
file data.
The list of valid keywords follows:
help (boolean) (alias=h) (default=false) = print usage information
version (boolean) (default=false) = print the version
information
dump_options (boolean) (default=false) = print
information about each option
dump_options_paramfile (ofile) = print
information about each option to paramfile
dump_options_xmlfile (ofile) = print
information about each option to XML file
par (ifile) = input parameter file
pversion (string) (default=Unspecified) = processing version string
suite (string) (default=OC) = product suite string for loading
suite-specific defaults
ifile (ifile) (alias=ifile1) = input L1 file name
ofile (ofile) (alias=ofile1) (default=output) = output file name
oformat (string) (default=netCDF4) = output file format
netcdf4: output a netCDF version 4 file
hdf4: output a HDF version 4 file
fqfile (ifile) (default=$OCDATAROOT/common/morel_fq.nc) = f/Q correction file
parfile (ifile) = par climatology file for NPP calculation
calfile (ifile) = system calibration file
xcalfile (ifile) = cross-calibration file
sl_pixl (int) (default=-1) = SeaWiFS only, number of LAC pixels for
straylight flagging
sl_frac (float) (default=0.25) = SeaWiFS only, straylight fractional
threshold on Ltypical
gain (float) = calibration gain multiplier
offset (float) = calibration offset adjustment
spixl (int) (default=1) = start pixel number
epixl (int) (default=-1) = end pixel number (-1=the last pixel)
sline (int) (default=1) = start line number
eline (int) (default=-1) = end line number (-1=the last line)