Spiders have two antennas, one GPS and one Iridium. The GPS antenna is able to receive GPS information at any angle, as long as it is not obstructed by metal (such as the bracket). The Iridium antenna, however, only receives and transmits data at an angle of approximately 170 degrees up from the top of the Spider.
- The Spider should be mounted up on top of the instrument panel in the aircraft, as far forward under the glare shield as possible to maximise visibility with the sky, and free from any obstructions.
- Spiders are not able to send or receive data through metal, carbon composites, or electrically heated windshields.
- A Spider is able to send data through glass, fibre glass, or plastic.
Good Examples Of Installation
Bad Examples of Installation
50% of the time satellites are between the horizon and 22 degrees above it. This means that if the Spider is positioned on the side windows, the Spider will struggle to connect to the satellite network, and therefore you will experience tracking delays.
If you can not mount the Spider in a location where it can see the sky, we recommend you use the Spider 7 or 8 with external antenna capability.
For more information please see this article:
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