The Historical Meteorological Observatory of the University of Genoa is collecting data since January 1, 1833. The data collection instrumentation has always remained on the terrace of the NW tower of the Palazzo Universitario in Via Balbi n° 5, in the city centre of Genoa.
The rainfall and temperature measurements carried out at the Meteorological Observatory of the University of Genoa represent one of the most reliable and complete thermo - pluviometric series over 100 years old in Italy, since, as indicated by Cortemiglia (1997), they do not show heterogeneity or anomalies in the data trends, as also indicated by the cumulative average rainfalls perfectly distributed according to a straight line (Cortemiglia, 1997). The Observatory also offers similar barometric and anemometric series over a hundred years old.
In 1993 a Siap SM3820 automatic weather station was installed complete with "smart" sensors for the detection of basic parameters (barometric pressure, air temperature and humidity, wind speed and direction, solar radiation and precipitation, on the top terrace of the Palace of the University of Genoa, with the barometric sensor at an altitude of 58.3 meters above sea level (the data available includes the altitude correction to get the pressure value referred to sea level).
The location of the equipment, which coincides with the position of the historic Meteorological Observatory of Genoa, in operation since 1833 and whose records are stored with the observational data at the end of hours, the averages, maximum and minimum of the various parameters, has made it possible to compare the direct observations (at the end of hours) with the data provided automatically by the new system and stored directly at our data center in Viale Benedetto XV, 5 in Genoa, through an appropriate management software.
In order to minimize the risk of faults caused by transients induced by electrical discharges (lightning strikes), always possible considering the location in a high place, in addition to making an adequate ground connection, the connection with the mains line has been completely eliminated, powering the meteorological station with backup batteries and photovoltaic modules.
The acquisition control unit allows the local storage of several days of data, useful in case of temporary problems in the automatic transmission system with hourly data download, to avoid the risk of data loss.
In 2015 the system was finally strengthened and renewed with the installation of a DA9000 Datalogger by Siap-Micros, to guarantee maximum compatibility with the sensors present in the Observatory, and the continuity of the data acquired.