Reference values for experiments
Information for RWTH internal users
Air Pressure
The air pressure at altitude is stated (IT-Center in the Ahornstreet = 222 m above sea level). For the altitude correction, it is possible to approximate an air pressure decrease of 11.8 hPa per 100 m altitude; based on an annual average temperature of 10 ° C. If the altitude is not known exactly, the following examples can serve as reference values.
|
Measurement Location |
Altitude (groundfloor level) |
correction value |
|---|---|---|
|
IT Center |
215 - 225 m above see level |
0 hPa |
|
Kopernikusstraße, University Hospital, Melaten, Königshügel (Chemistry, Sports Center, Mies-van-der-Rohe-Straße) |
200 - 210 m above see level |
+ 1,5 hPa |
|
Railway Station West, Audimax |
185 - 195 m above see level |
+ 3,5 hPa |
|
Central Area, Karman-Forum, Lochnerstraße |
170 - 190 m above see level |
+ 4,5 hPa |
Air Temperature and Humidity
The air temperature is given in 2 m above sea level. A generally valid method of correcting elevation or city-related effects can not be recommended. These effects are in the above mentioned areas relatively small, 1 K at the temperature, to set. If, especially in extreme weather conditions, very precise reference values are required, advice is recommended.