UtilHumidity2DewPoint Method

Calculate the dew point (°Celsius) given the ambient temperature (°Celsius) and relative humidity (%)

Definition

Namespace: ASCOM.Utilities
Assembly: ASCOM.Utilities (in ASCOM.Utilities.dll) Version: 7.1.3+4851.c5da65c2b

C#

public double Humidity2DewPoint(
	double RelativeHumidity,
	double AmbientTemperature
)

VB

Public Function Humidity2DewPoint ( 
	RelativeHumidity As Double,
	AmbientTemperature As Double
) As Double

C++

public:
virtual double Humidity2DewPoint(
	double RelativeHumidity, 
	double AmbientTemperature
) sealed

RelativeHumidity Double: Relative humidity expressed in percent (0.0 .. 100.0)
AmbientTemperature Double: Ambient temperature (°Celsius)

Double
Dew point (°Celsius)

'Calculation uses Vaisala formula for water vapour saturation pressure and is accurate to 0.083% over -20C - +50°C

http://www.vaisala.com/Vaisala%20Documents/Application%20notes/Humidity_Conversion_Formulas_B210973EN-F.pdf

InvalidValueException	When relative humidity < 0.0% or > 100.0%>
InvalidValueException	When ambient temperature < absolute zero or > 100.0C>