Taking outside temperature reading

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One of the longest scientific data set from Hally is the meteorological record. A lot has changed since 1956 with regards to how the observations are conducted, with parameters like temperature, humidity, atmospheric pressure, wind speed and direction, visibility, solar radiation and others measured continuously by automatic instruments, however to ensure that all those instruments are correctly calibrated and still indicate correct values, every day a series of manual readings are taken as well.

In the picture the Halley Doctor Greig Lawson is taking a temperature reading off of four thermometers installed in the Stevenson Screen. These will be entered into a database for comparison with the Automatic Weather Station’s sensors.