[R-sig-Geo] Question about trasport time calculation

[Christopher W. Ryan]

If

you have the distances between the starting point and the ending point
(you provide approximations below),

and you assume the particle travels at the velocity of the wind,

and you assume the particles travel in straight lines,

then why can't you use time = distance/velocity?

--Chris  Ryan

Kunal Bali wrote:
> Hi,
> 
> Is it possible to calculate the transport time (of a particle) between 2
> coordinates using wind speed and distance?
> I know I can't simply apply Velocity = Distance/time over here because
> coordinates have different angles (lat, lon).
> So, could anyone provide some thoughts on it?
> 
> I have some coordinates e.g.
> 
> location 1(64.8, -147.7)
> location 2(64.8, -149.5)
> location 3(66.2, -150.0)
> 
> the distance between (2 and 1)  coordinates are ~ 35 km
> the distance between (3 and 1)  coordinates are ~ 133 km
> 
> the wind speed over (1, 2) coordinates is ~ 6 m/s
> the wind speed over (1,3) coordinates is  ~ 2 m/s
> 
> So, how much time will be taken by a particle from locations 2 and 3 to
> location 1 with the given distance and wind speed?
> 
> Thanks
> ---
> Kunal Bali
> 
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