pyrtlib.utils.dewpoint2rh#

pyrtlib.utils.dewpoint2rh(td: float, t: float, ice: Optional[bool] = False, method: Optional[str] = 'arm') → float#

Calculate relative humidity from temperature and dewpoint. Value is calculated using the August-Roche-Magnus approximation. [August-1828] [Magnus-1844].

\[RH = \frac {\exp(\frac{a T_d}{b+T_d})} {\exp(\frac{a T}{b+T})}\]
\[where \ a = 17.625, b = 243.04\]
\[RH = \frac {6.1078\times10^{\frac{aT_d}{b + T_db}}}{6.1078\times10^{\frac{a T}{b + T}}}\]
\[where \ a = 7.5, b = 265.5\]
Parameters:

  • td (float) – The dew point temperature in Celsius

  • t (float) – The temperature in Celsius

Returns:

The relative humidity to the provided dew point temperature

Return type:

float

References

Examples using pyrtlib.utils.dewpoint2rh#

Performing Upwelling Brightness Temperature calculation using IGRA2 Upper Air Observations (with Extrapolation).

Performing Upwelling Brightness Temperature calculation using IGRA2 Upper Air Observations (with Extrapolation).

Performing Upwelling Brightness Temperature calculation using Wyoming Upper Air Observations.

Performing Upwelling Brightness Temperature calculation using Wyoming Upper Air Observations.
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