Hello people.
I usually calibrate the barometric altimeter every time I run.
I introduce the height and pressure data at sea level that I draw from two different websites and that seem quite reliable.
The pressure is given by a weather station near home.
The problem is that, sometimes, when the atmospheric conditions are variable, the route that takes me off gives unevennesses that are not at all real, with several meters below sea level.
I say it is only sometimes, and when there is an unstable time.
Is it something to be accustomed to or is there a way to be more precise? Is there any way to anticipate these pressure changes, through topographic maps or something?
Thank you.
Regards, Juan