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.. _tutorial-data-acquisition:
Data acquisition
----------------
* Every hour, we receive data from Exeter, Toulouse and Offenbach.
* Every three hours we receive data from Washington.
* Once a day we receive data from Tokyo.
* Every Monday from Melbourne.
* Every first of the month from Montreal.
Three kinds of data are received::
* Observations
* GRIB fields
* Satellite images
The acquisition is done in three steps::
* The data is received from the outside world.
* The data is processed.
* The data is stored in a database.
Once a day the data received the day before is extracted from the database and written into the archive.
**What to do:**
1. Write the :term:`suite definition` for this suite
Useful pointers:
* :ref:`tutorial-add-trigger`
* :ref:`tutorial-dates-and-clocks`
* :ref:`tutorial-time-dependencies`
* :ref:`tutorial-repeat`
* :ref:`python_based_suite_definition`
Because there is no standard unix date manipulation command, you can use ecf_date.
One possible :ref:`tutorial-data_acquisition_soln`
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