Appropriate data from the .nc file, such as time, coordinates and temperature values, were extracted and converted into .csv format. This was due to the accessible format of .csv files. Csv files are commonly used for the storage and distribution of data. Analysis of the ERA5 was initiated once in this format. Originally two variables were selected for analysis (2m temperature  and surface pressure), however upon initiation of analysis, a single variable, temperature,  proved to be sufficient.
Each coordinate within a quarter degree of the chosen window (latitude 49–50° and longitude 8–9°) was extracted and assigned to a variable name. This allowed for individual analysis per coordinate or location. The quality and distribution for each location was then assessed. For the purposes of reanalysis in this study, the city of Frankfurt was divided into 25 distinct locations, which are tabulated below:
Table 1: Co-ordinates of each of the 25 locations in nearby regions to Frankfurt
Station locationLongitude Latitude Name of location
018°E50°NOestrich - Winkel
028.25°E50°NMainz
038.5° E50° NHasslock (East)
048.75° E50° NGotzehain
059° E50° NZellhausen
068° E49.75°NNack (Northwest)
078.25° E49.75°NDittelsheim-Hessloch
088.5° E49.75°NGernsneim
098.75° E49.75°NWebern
109° E49.75°NNack (North)
118° E49.5°NHertlinghausen (West)
128.25° E49.5°NWeisenheim am Sand
138.5° E49.5°NWohlgelegen
148.75° E49.5°NLampenhain (West)
159°E49.5°NSoitzberg
168°E49.25°NDernbach
178.25°E49.25°NOberlustadt
188.5°E49.25°NWaghausel
198.75°E49.25°NMuhlhausen
209°E49.25°NEhrstadt (North East)
218°E49°NSchleithal (North West)
228.25°E49°NNeuburg am Rhein
238.5°E49°NGrotzingen
248.75°E49°NKleinvillars
259°E49°NHohenhaslach