Please cite SAGA whenever you use it for your publications:

This tool adjusts air pressure values to the elevation using the barometric formula. Default values refer to the international standard atmosphere.

Name	Type	Identifier	Description	Constraints
Input
Air Pressure	grid, input, optional	P	[hPa]
Air Pressure Elevation	grid, input, optional	Z	[m]
Temperature	grid, input, optional	T	[Celsius]
Temperature Lapse Rate	grid, input, optional	L	[K/m]
Elevation	grid, input	DEM	[m]
Output
Adjusted Air Pressure	grid, output	P_ADJ
Options
Default	floating point number	P_DEFAULT	default value if no grid has been selected	Default: 1013.25
Default	floating point number	Z_DEFAULT	default value if no grid has been selected	Default: 0
Default	floating point number	T_DEFAULT	default value if no grid has been selected	Default: 0
Default	floating point number	L_DEFAULT	default value if no grid has been selected	Default: 0.0065