How come there’s GPS reception inside the Massey Tunnel near Vancouver, BC?
sentiment50 asked:
Quite surprisingly, my GPS has reception inside the Massey tunnel, which shows my exact position inside the tunnel and my progress. This is true when driving in both directions. Since the tunnel is made of concrete and is covered in 15 meters of rocks (according to Wikipedia), this is quite amazing. Is there some internal GPS repeater inside the tunnel maybe?
Quite surprisingly, my GPS has reception inside the Massey tunnel, which shows my exact position inside the tunnel and my progress. This is true when driving in both directions. Since the tunnel is made of concrete and is covered in 15 meters of rocks (according to Wikipedia), this is quite amazing. Is there some internal GPS repeater inside the tunnel maybe?
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Would have to be a repeater of some kind or your GPS relying on its memory of previous trips. Some car navigation also uses phone signals instead of satellite in urban “canyons”. Chris