Lighthouse work

Val and I found ourselves back at the lighthouse again last Thursday and Friday. We complained about being in that dark lighthouse, soldering and splicing, while we could hear people having fun at the beach just a few hundred metres away. But then we figured that if you have to be soldering and splicing, it's better to be doing it with the sea breeze outside the door and waves washing up onto the rocks 10 feet away, rather than in the freezing cold electronics lab at CCOM (and I do mean freezing).



You may notice that there is a GPS (Global Positioning System) antenna mounted under a deck. And we're OK with it! Sure, the positioning will probably be pretty crappy, but we're not using it to find position - an additional signal that comes out of a GPS receiver is a very accurate pulse every second. For GPS to work, very precise timing is required to synchronize the satellite signals and the receivers. This works out for us because we're going to use the clever GPS timing scheme to synchronize the acoustic signals we're sending into the harbour.



Val made me take this picture of a splice we did between the GPS cable and ethernet cable. It's more impressive than it looks. Well, on second thought, it probably isn't.