open TELEMAC-MASCARET The mathematically superior suite of solvers

Hi all,
I want to run a model by providing wind varying in space and time. As per the example says, I tried to create an atmospheric file (text file having Lat, long of each station points and wind u and wind v velocities at each time).

What modification should I make in the Fortran file if I am not adding wind direction but only wind speed?

While specifying Lat and Long of the station, what should be the projection: geographic, UTM or anything else?

Attachments: sample of atmospheric file and Fortran file

hey, please help to solve the above mentioned issues.