# VII.	Height above ground

The instrument is able to tell you how high from the ground you are thanks to topography data recorded by the Shuttle Radar Topography Mission realized in 2000 by Endeavour space shuttle (see <http://en.wikipedia.org/wiki/Shuttle_Radar_Topography_Mission>).

&#x20;To send topography data into your instrument:

&#x20;1\)      You must go to our dedicated webpage: <https://www.syride.com/en/topography>

2\)      Then move the red rectangle to your selected fly area, and download the data.

3\)      Turn on and connect your instrument with the USB cable.

4\)      Then go in the SYS PC Tool, and click on the **“Send a file to my instrument”** icon, and select the file you previously downloaded.

5\)      Wait until the end ot the file upload and restart your instrument.

&#x20;Caution, height above the ground has a precision of ±20m, plus the GPS precision (a few meters).&#x20;

<figure><img src="/files/uq9PXKd04QFbZnhBnPw5" alt=""><figcaption></figcaption></figure>

<mark style="color:red;">**To display your height above ground, this information must be included in your screen configuration (see previous chapter) and you need GPS reception.**</mark>

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