Those who were with us on Sunday will remember the aerial sticking out of my rucksack – the big aerial that became a lot smaller when I went under a low branch :-(

Anyway, it was connected to the experimental rucksack-sized version of the Gruntmobile Tracker, aka the WalkerStalker. A tiny transmitter connected to my spare GPS, beaconing my position to the world every five minutes. Here’s the track it recorded:

In the time it was running it would have transmitted 55 beacons, of which 30 made it into the repeater network: Interestingly, the damage to the aerial doesn’t seem to have made much difference – the cessation of transmissions at the lunch stop is because the GPS batteries died, nothing to do with the radio.

So, broadly speaking the technology works :-) . Another trial this weekend.

Oops…forgot the obligatory…
Images produced from the Ordnance Survey Get-a-map service. Image reproduced with kind permission of Ordnance Survey and Ordnance Survey of Northern Ireland.

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