Re: [Flightgear-devel] Tides in FlightGear?

[Steve H. <st...@ca...>]

Martin Doege wrote:

> Of course the tide calculations would not be required to be extremely=20
> accurate =E0 la xtide -- the hour angle of the Moon would probably be=20
> quite sufficient as a broad indication of tide.
>

It would have to be slightly more than just that. At the very least,=20
you'd need a delay-factor for the local hour-angle of the moon. Also an=20
amplitude-factor.

Even then, you'd sometimes get the tide happening about an hour=20
displaced from reality due to the loss of the solar tide. If you added a=20
simple solar tide (i.e a delay factor for the local solar hour-angle and=20
a solar-tide amplitude-factor) then you'd probably be getting a pretty=20
good rough approximation for a given area. Good enough for a flight-sim,=20
certainly.

It would also better model those areas of the world where the solar tide=20
dominates and there's only one significant tide per day.

Steve