Hello,
Indeed, if you do not set the keywords LATITUDE OF ORIGIN POINT, LONGITUDE OF ORIGIN POINT, ORIGINAL DATE OF TIME, ORIGINAL HOUR OF TIME in the TELEMAC-3D steering file, the ones without values will be set to default value (resp. 0, 0, January 1st 1900 and 0h).
In $HOMETEL/examples/waqtel/heat_exchange/t3d_heat_exchange_rain_wind.cas steering file, you can read that the 4 of them are set.
Hope this helps,
Chi-Tuan