Tim:
While that sounds reasonable, the 15 second refresh period does not. Does it really do that? Is it really necessary to do so?
Steven Stern:
I've left the capture running for a while and it seems that the timing varies. It's been a while since it last checked. It seems that the checks are once per 30 seconds. So, that's one http call per 30 seconds. I can live with that.
I was thinking of the other side of the equation: Thousands of Linux users all blasting some server every few seconds for the next few years.
Unless you're actually in the airport control tower, or flying a plane, I doubt you need to keep updating a weather report that often.