I've made some good progress cleaning up the code, going from rough POC hacks to a more solid design th build off from. The next big change will be to add in support for more than one sensor. I also have now converted the angle information from a time into proper angles.

I mentioned earlier how stable the signal is. Below is an example of a sensor placed ~15 ft (4.5m) from the lighthouse. The sensor is near the center of the lighthouse's field of view (90 degrees is centered in X and Y), although I don't expect that to affect precision.

Units are degrees.

74.7528  96.7279
74.7538  96.7282
74.7540  96.7269
74.7543  96.7285
74.7556  96.7264
74.7558  96.7274
74.7556  96.7300
74.7538  96.7261
74.7553  96.7282
74.7538  96.7264
74.7538  96.7282
74.7497  96.7292
74.7530  96.7277
74.7530  96.7267
74.7533  96.7277