# ReadItlrFs3d
read ITLR FS3D (Free Surface 3D) binary data

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## Parameters
|name|description|type|
|-|-|-|
|first_step|first timestep to read|Int|
|last_step|last timestep to read (-1: last)|Int|
|step_increment|number of steps to increment|Int|
|first_rank|rank for first partition of first timestep|Int|
|increment_filename|replace digits in filename with timestep|Int|
|grid_filename|.bin file for grid|String|
|filename0|.lst or .bin file for data|String|
|filename1|.lst or .bin file for data|String|
|filename2|.lst or .bin file for data|String|
|num_partitions|number of partitions (-1: MPI ranks)|Int|
|distribute_time|distribute timesteps across MPI ranks|Int|