combiner

The combiner processes and combines files for MODIS Aqua and MODIS Terra (SST/SST4/OC) as well as VIIRS (SST/SST3). Input data is created from the downloader component.

Top-level Generate repo: https://github.com/podaac/generate

pre-requisites to building

An IDL license for executing IDL within the Docker container. A license file obtained from the vendor ending in .dat should be placed in the idl/install directory.

The following IDL files must be compiled to .sav files:

• combine_netcdf_sst_and_sst3_files_to_netcdf.pro
• combine_netcdf_sst_and_sst4_files_to_netcdf.pro
• is_netcdf_granule_night_or_day.pro

To compile IDL files:

1. cd to the IDL directory (combiner/idl).
2. Execute idl.
3. Inside the IDL command prompt, execute: .FULL_RESET_SESSION
4. Inside the IDL command prompt, execute: .COMPILE {file name without '.pro' extension}
   1. Example: .COMPILE combine_netcdf_sst_and_sst3_files_to_netcdf
5. Inside the IDL command prompt, execute: RESOLVE_ALL
6. Inside the IDL command prompt, execute: SAVE, /ROUTINES, FILENAME='{file name}.sav'
   1. Example: SAVE, /ROUTINES, FILENAME='combine_netcdf_sst_and_sst3_files_to_netcdf.sav'

build command

docker build --build-arg IDL_INSTALLER=idlxxx-linux.tar.gz --build-arg IDL_VERSION=idlxx --tag combiner:0.1 .

Build arguments:

• IDL_INSTALLER: The file name of the IDL installer.
• IDL_VERSION: The version of IDL that will be installed.

execute command

Arguemnts:

1. num_files_to_combine
2. num_minutes_to_wait
3. value_move_instead_of_copy
4. data_source
5. processing_type
6. job_index

MODIS A: docker run --name gen-comb -v /combiner/input:/data -v /processor/input:/data/scratch combiner:0.1 30 300 yes MODIS_A QUICKLOOK 0 docker run --name gen-comb -v /combiner/input:/data -v /processor/input:/data/scratch combiner:0.1 30 300 yes MODIS_A REFINED 0

MODIS T: docker run --name gen-comb -v /combiner/input:/data -v /processor/input:/data/scratch combiner:0.1 30 300 yes MODIS_T QUICKLOOK 0 docker run --name gen-comb -v /combiner/input:/data -v /processor/input:/data/scratch combiner:0.1 30 300 yes MODIS_T REFINED 0

VIIRS: docker run --name gen-comb -v /combiner/input:/data -v /processor/input:/data/scratch combiner:0.1 25 300 yes VIIRS QUICKLOOK 0 docker run --name gen-comb -v /combiner/input:/data -v /processor/input:/data/scratch combiner:0.1 25 300 yes VIIRS REFINED 0

NOTES

• In order for the commands to execute the /combiner/ directories will need to point to actual directories on the system.
• IDL is installed and configured by the Dockerfile.

aws infrastructure

The combiner includes the following AWS services:

• AWS Batch job definition.
• CloudWatch log group.
• Elastic Container Registry repository.

terraform

Deploys AWS infrastructure and stores state in an S3 backend using a DynamoDB table for locking.

To deploy:

1. Edit terraform.tfvars for environment to deploy to.
2. Edit terraform_conf/backed-{prefix}.conf for environment deploy.
3. Initialize terraform: terraform init -backend-config=terraform_conf/backend-{prefix}.conf
4. Plan terraform modifications: terraform plan -out=tfplan
5. Apply terraform modifications: terraform apply tfplan

{prefix} is the account or environment name.