===========================
EMMA Geomagnetic field data
===========================

.. contents:: Table of contents

1-minute averages of the magnetic field variations recorded at 27 ground stations located in Italy and Europe along a meridional chain covering a large range in geographical latitude (from 70 to 42 degrees). The data are automatically collected in near real-time and updated every 15 minutes.

References
~~~~~~~~~~



Dataset summary
~~~~~~~~~~~~~~~

.. list-table::

  * - **internal_name:**
    - uniaq_mag_emma_timeseries
  * - **publisher:**
    - University of L'Aquila Dept. of Physical and Chemical Sciences
  * - **alph_code:**
    - 10
  * - **id_tmp:**
    - 34
  * - **short_name:**
    - EMMA-data
  * - **identifier:**
    - aspis://uniaq/emma
  * - **dynamic:**
    - For each day, there is one master dataset containing the general information of each station and related dataset and n (maximum value 27) datasets containing the 1-minute averages of the individual stations.
  * - **size:**
    - 2MB
  * - **format:**
    - csv
  * - **type:**
    - tableset
  * - **records_number:**
    - 277
  * - **time_start:**
    - 2022-01-01
  * - **time_stop:**
    - 2023-12-21
  * - **spatial:**
    - GROUND
  * - **messenger:**
    - MHD waves
  * - **spectral_min:**
    - 0
  * - **spectral_max:**
    - 0
  * - **spectral_units:**
    - 
  * - **observable:**
    - {GLE}
  * - **latest update:**
    - 2024-03-28 05:08:15

Columns specification
~~~~~~~~~~~~~~~~~~~~~

.. list-table:: 
   :widths: 7 20 15 10 48
   :align: right 
   :header-rows: 1

   * - progr
     - column
     - units
     - type
     - description
   * - 1
     - time
     - UTC
     - datetime
     - Initial UTC time of the dataset in the format YYYY-MM-DDThh:mm:ss
   * - 2
     - Code
     - -
     - string
     - The code of the station (three capital letters according the the INTERMAGNET standards)
   * - 3
     - filename
     - -
     - string
     - name of the station dataset
   * - 4
     - Reference Frame
     - -
     - string
     - coordinate system used to record geomagnetic field values
   * - 5
     - data ratio
     - -
     - float
     - valid data percentage in a daily dataset
   * - 6
     - var_1
     - pT
     - float
     - range of variation of component 1 of the geomagnetic field computed on the whole period
   * - 7
     - STD_1
     - pT
     - float
     - standard deviation of component 1 of the geomagnetic field variations computed on the whole period
   * - 8
     - var_2
     - pT
     - float
     - range of variation of component 2 of the geomagnetic field computed on the whole period
   * - 9
     - STD_2
     - pT
     - float
     - standard deviation of component 2 of the geomagnetic field variations computed on the whole period
   * - 10
     - var_3
     - pT
     - float
     - range of variation of component 3 of the geomagnetic field computed on the whole period
   * - 11
     - STD_3
     - pT
     - float
     - standard deviation of component 3 of the geomagnetic field variations computed on the whole period
