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sdrangel/plugins/feature/radiosonde/readme.md

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<h1>Radiosonde Feature Plugin</h1>
<h2>Introduction</h2>
The Radiosonde feature displays a table containing the most recent information received from radiosondes
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based on data received via [Radiosonde Demodulators](../../channelrx/demodradiosonde/readme.md).
The chart can plot two data series vs time for the radiosonde selected in the table.
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The Radiosonde feature can draw balloons objects on the [Map](../../feature/map/readme.md) feature in 2D and 3D.
<h2>Interface</h2>
![Radiosonde feature plugin GUI](../../../doc/img/Radiosonde_plugin.png)
<h3>Radiosonde Table</h3>
The Radiosonde table displays the current status of each radiosonde, based on the latest received data from all Radiosonde Demodulators.
* Serial - The serial number that uniquely identifiers each radiosonde.
* Type - The type of radiosonde.
* Lat (°) - Latitude in degrees. East positive. Double clicking on this column will center the map on this object.
* Lon (°) - Longitude in degrees. West positive. Double clicking on this column will center the map on this object.
* Alt (m) - The altitude of the radiosonde in metres.
* Spd (km/h) - Speed over ground in kilometres per hour.
* VR (m/s) - Vertical climb rate in metres per second.
* Hdg (°) - Heading in degrees.
* Status - Flight status of the radiosonde (E.g. On ground, ascent or descent).
* P (hPA) - Air pressure in hectopascals. Not all RS41s include a pressure sensor. A value ending with 'U' indicates a uncalibrated estimate and may be inaccurate.
* T (°C) - Air temperature in degrees Celsius. A value ending with 'U' indicates a uncalibrated estimate and may be inaccurate.
* U (%) - Relative humidity in percent. A value ending with 'U' indicates a uncalibrated estimate and may be inaccurate.
* Alt Max (m) - The maximum altitude seen for the radiosonde in metres.
* Freq (MHz) - The transmission frequency in megahertz as indicated by the radiosonde.
* BurstKill status - Whether the BurstKill timer is active.
* BurstKill timer - BurstKill timer.
* Updated - Gives the date and time the last message was received.
* Messages - Displays the number of messages received.
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Right clicking on the table header allows you to select which columns to show. The columns can be reordered by left clicking and dragging the column header.
Right clicking on a table cell allows you to copy the cell contents, or find the radiosonde on the map.
<h3>Map</h3>
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The Radiosonde feature can plot balloons (during ascent) and parachutes (during descent) on the [Map](../../feature/map/readme.md).
To use, simply open a Map feature and the Radiosonde plugin will display objects based upon the data it receives from that point.
Selecting a radiosonde item on the map will display a text bubble containing information from the above table.
To centre the map on an item in the table, double click in the Lat or Lon columns.
![Radiosonde on map](../../../doc/img/Radiosonde_plugin_map.png)
<h2>Attribution</h2>
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* Hot-air-balloon icons created by Freepik - https://www.flaticon.com/free-icons/hot-air-balloon
* Parachute icons created by Freepik - https://www.flaticon.com/free-icons/parachute