.. _mars.hindcast.rst:

MARS hindcast (option **--step**)
=================================

* For MARS hindcast, option **--step** allows to make runs by blocks. You must specify the number of days for each block.

* To make MARS hindcast from 01/01/2013 to 01/01/2014, with block every 30 days:

::

    launch_mangae config_mangae.cfg -s 2013-01-01,00:00 -e 2014-01-01,00:00 --step 30


* To follow if the run is OK

  * check if sections are **OK** in **f1-mangae.xml**
  * in case of problem, check the log files **./logs/MANGAE2500-r1630/20140101_20140105/*.log**

* Output files: MARS results in **./res**, there is one directory for each step.

.. warning:: By default, **saverestart_step** is at 1 in **paraspec.txt.ref**. Do not forget to change it for long hindcast ! You can for example give the step value.

::

    [[[paraspec]]]
      saverestart_step = 10.0


* Jobs specified in **treatments** section are launched.

If **treatments** section is:

::

 [treatments]
  list = ['meteo', 'obc', 'river', 'rank_0', 'rank_1', 'format_oco','demerliac','mirror_copy','finalize']

Jobs that are launched are:


  * **meteo** : Preparation of meteorological forcings for ranks 0 & 1
  * **obc** : Preparation of open boundaries conditions
  * **river** : Preparation of river forcings
  * **rank_0**  : MANGAE config, run Mars rank 0
  * **rank_1**  : MANGAE config, run Mars rank 1
  * **format_oco**      : Format rank 1 outputs to OCO norm
  * **demerliac**       : Demerliac filtering of hourly data
  * **mirror_copy**     : Copy results files to mirror directory
  * **finalize**        : Finalize the operational execution