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Long Term MUF maps centered on Catania
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.. contents:: Table of contents

Long Term maps of Maximum Usable Frequency (MUF) and skip distance centered on Catania over an area extending in latitude from 34° N to 48° N and in longitude from 5° W to 20° E, which includes the whole Italian territory. Long term maps are 24, one for each hour of the month,  valid for the whole month, and are calculated on the basis of the predicted 12-months smoothed sunspots number.

References
~~~~~~~~~~



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

.. list-table::

  * - **internal_name:**
    - ingv_ltmuf_catania_tableset
  * - **publisher:**
    - INGV
  * - **alph_code:**
    - 28B
  * - **id_tmp:**
    - 70
  * - **short_name:**
    - LTMUFCatania
  * - **identifier:**
    - aspis://ingv/ltmuf_catania_tableset
  * - **dynamic:**
    - The Data bulk size refers to the size of one map. The number of maps will be 24, one for each hour of the day, valid for the whole month. The first day of a new month a new collection of 24 maps will be calculated.
  * - **size:**
    - 1MB
  * - **format:**
    - dat,png
  * - **type:**
    - image
  * - **records_number:**
    - 48
  * - **time_start:**
    - 2017-09-07
  * - **time_stop:**
    - 2017-09-08
  * - **spatial:**
    - IONO
  * - **messenger:**
    - electrons - the maps are strictly connected with the electron density of the ionosphere
  * - **spectral_min:**
    - 0
  * - **spectral_max:**
    - 0
  * - **spectral_units:**
    - 
  * - **observable:**
    - {TEC}
  * - **latest update:**
    - 2024-03-28 05:08:10

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

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

   * - progr
     - column
     - units
     - type
     - description
   * - 1
     - time
     - UTC
     - datetime
     - time of the sounding
   * - 2
     - Lat
     - deg
     - float
     - (MHz) maximum frequency reflected by the F2 layer
   * - 3
     - Long
     - deg
     - float
     - (MHz) maximum frequency reflected by the F1 layer
   * - 4
     - site
     - char
     - char
     - (MHz) maximum frequency reflected by the sporadic E layer
   * - 5
     - data_name
     - char
     - char
     - (MHz) maximum usable frequency for a distance of 3000 km centered over the ionosonde site
   * - 6
     - prew_name
     - char
     - char
     - (adimensional) propagation factor
   * - 7
     - thumb_name
     - char
     - char
     - (km) virtual height of the sporadic E layer
