preilley_454@comcast.net said: > The curious thing are the excursions. Rather than being noise like, some > follow a distinct path. But this is only over a few seconds so it seems > unlikely that they are caused by weather conditions. ... I've seen similar quirks when a non-timing unit ran out of satellites. I assume that it switched to dead reckoning mode and the last noisy sample included some velocity. A few examples have made it to an orbit down near the south pole. It would be interesting to look at the signal quality during and just before one of your little filaments. -- These are my opinions. I hate spam.