l1bgen_modis command

l1bgen_modis

Description: This program creates MODIS formatted Aqua or Terra Level 1B files at 1km, 500m, and 250m resolutions. It requires a MODIS formatted Level 1A file and its corresponding Geolocation file as input. If no output L1B filename is specified, the filename will be constructed using the AYYYYDDDHHMMSS.L1B_LAC or TYYYYDDDHHMMSS.L1B_LAC format reflecting the calculated pass start time. A default L1B file output directory can be defined via the $SEADAS/config/seadas_setup command.

Command Mode:

Usage: l1bgen_modis, ifile="ifile", geofile="geofile", ofile="ofile", filehkm="filehkm", fileqkm="fileqkm", refllutfile="refllutfile", emislutfile="emislutfile", qalutfile="qalutfile", /delete1km, /deletehkm, /deleteqkm, /savelog, /wait

Minimum command: l1bgen_modis, ifile="ifile", geofile="geofile"

Arguments/Keywords:

ifile Input MODIS Aqua or Terra L1A file for generating the L1B file. (Required)

geofile Input MODIS Aqua or Terra Geolocation file for generating the L1B file. (Required)

ofile Output filename for the 1km L1B file. (Optional)

filehkm Output filename for the 500m L1B file. (Optional)

fileqkm Output filename for the 250m L1B file. (Optional)

refllutfile User-specified Reflective LUT file. (Optional)

emislutfile User-specified Emissive LUT file. (Optional)

qalutfile User-specified QA LUT file. (Optional)

delete1km Delete the 1km resolution L1B file.

deletehkm Delete the 500m resolution L1B file.

deleteqkm Delete the 250m resolution L1B file.

savelog Save the Level 1B processing LogStatus file. (The log is deleted by default if processing completes without a fatal error.)

wait A keyword, if not set or a value 0 (default), the command will spawn the program as a background process and come back right away for the next SeaDAS command. Otherwise, if the keyword is set or with a value 1, the command will spawn the program as a foreground job and wait for it to complete before the next SeaDAS command can be executed.

Interactive Mode:

Main Widget:

The main_widget can be accessed by selecting "l1bgen_modis" from the Process -> MODIS pull down menu in SeaDAS main menu or from the command line mode by typing: "l1bgen_modis".
Input items:

Input MODIS L1A file The input MODIS L1A file for generating the Aqua or Terra L1B file. (Required)

Input Geolocation file The input MODIS Geolocation file for generating the Aqua or Terra L1B file. (Required)

Output L1B 1km file Optional output filename for the 1km L1B file.

Output L1B 500m file Optional output filename for the 500m L1B file.

Output L1B 250m file Optional output filename for the 250m L1B file.

Reflective LUT file Optional user-specified Reflective LUT file. This field auto-fills with the default satellite-specific LUT when the user selects an L1A file. (All three LUTS MUST reside in the same directory.)

Emissive LUT file Optional user-specified Emissive LUT file. This field auto-fills with the default satellite-specific LUT when the user selects an L1A file. (All three LUTS MUST reside in the same directory.)

QA LUT file Optional user-specified QA LUT file. This field auto-fills with the default satellite-specific LUT when the user selects an L1A file. (All three LUTS MUST reside in the same directory.)

Retain L1B 1km resolution file? Option to keep/delete the 1km L1B file when processing completes. (Default=keep)

Retain L1B 500m resolution file? Option to keep/delete the 500m L1B file when processing completes. (Default=keep)

Retain L1B 250m resolution file? Option to keep/delete the 250m L1B file when processing completes. (Default=keep)

Make Default buttons These buttons will save the current state of the corresponding option as a default for future SeaDAS sessions. (If SeaDAS is exited after a Make Default action has occurred, SeaDAS must be run in a NEWLY OPENED xterm for the change to take effect.)

Select Buttons These buttons display the File Selection Widget for their corresponding input files.

Log file The output file name for the processing log file if the user selects Submit.

Run To start the l1bgen_modis program.

Submit To start and run the l1bgen_modis program as a background process.

Help Online help for l1bgen_modis program.

Quit To quit this program.

Curator: OceanColor Webmaster

Authorized by: gene carl feldman

ifile	Input MODIS Aqua or Terra L1A file for generating the L1B file. (Required)
geofile	Input MODIS Aqua or Terra Geolocation file for generating the L1B file. (Required)
ofile	Output filename for the 1km L1B file. (Optional)
filehkm	Output filename for the 500m L1B file. (Optional)
fileqkm	Output filename for the 250m L1B file. (Optional)
refllutfile	User-specified Reflective LUT file. (Optional)
emislutfile	User-specified Emissive LUT file. (Optional)
qalutfile	User-specified QA LUT file. (Optional)
delete1km	Delete the 1km resolution L1B file.
deletehkm	Delete the 500m resolution L1B file.
deleteqkm	Delete the 250m resolution L1B file.
savelog	Save the Level 1B processing LogStatus file. (The log is deleted by default if processing completes without a fatal error.)
wait	A keyword, if not set or a value 0 (default), the command will spawn the program as a background process and come back right away for the next SeaDAS command. Otherwise, if the keyword is set or with a value 1, the command will spawn the program as a foreground job and wait for it to complete before the next SeaDAS command can be executed.

Input MODIS L1A file	The input MODIS L1A file for generating the Aqua or Terra L1B file. (Required)
Input Geolocation file	The input MODIS Geolocation file for generating the Aqua or Terra L1B file. (Required)
Output L1B 1km file	Optional output filename for the 1km L1B file.
Output L1B 500m file	Optional output filename for the 500m L1B file.
Output L1B 250m file	Optional output filename for the 250m L1B file.
Reflective LUT file	Optional user-specified Reflective LUT file. This field auto-fills with the default satellite-specific LUT when the user selects an L1A file. (All three LUTS MUST reside in the same directory.)
Emissive LUT file	Optional user-specified Emissive LUT file. This field auto-fills with the default satellite-specific LUT when the user selects an L1A file. (All three LUTS MUST reside in the same directory.)
QA LUT file	Optional user-specified QA LUT file. This field auto-fills with the default satellite-specific LUT when the user selects an L1A file. (All three LUTS MUST reside in the same directory.)
Retain L1B 1km resolution file?	Option to keep/delete the 1km L1B file when processing completes. (Default=keep)
Retain L1B 500m resolution file?	Option to keep/delete the 500m L1B file when processing completes. (Default=keep)
Retain L1B 250m resolution file?	Option to keep/delete the 250m L1B file when processing completes. (Default=keep)
Make Default buttons	These buttons will save the current state of the corresponding option as a default for future SeaDAS sessions. (If SeaDAS is exited after a Make Default action has occurred, SeaDAS must be run in a NEWLY OPENED xterm for the change to take effect.)
Select Buttons	These buttons display the File Selection Widget for their corresponding input files.
Log file	The output file name for the processing log file if the user selects Submit.
Run	To start the l1bgen_modis program.
Submit	To start and run the l1bgen_modis program as a background process.
Help	Online help for l1bgen_modis program.
Quit	To quit this program.