Throughout my PhD, I have spent a total of five months on field campaigns with two ground-based UV-visible spectrometers and a sun-tracker. These instruments are usually operated in a challenging high-Arctic environment: the Polar Environment Atmospheric Research Laboratory (PEARL) at Eureka, Nunavut (80N, 86W). I will present some of my experiences in the field and will discuss how small changes to instrumentation can affect data quality. Furthermore, I will present the resulting ozone, NO2, and BrO vertical column density time-series and will briefly overview some of the applications of this dataset.