Monitoring and attributing changes in Earth climate requires high-radiometric-accuracy spectral measurements of sunlight reflected from the Earth's surface. The HyperSpectral Imager for Climate Science (HySICS) is a new imaging spectrometer intended to ultimately achieve ~ 0.2 % radiometric accuracies, being ~ 10 × better than existing spaceflight instruments. We describe the results from a high-altitude balloon flight demonstrating techniques intended to meet these high-accuracy requirements.

In this paper, a 26-year-long time series of total ozone column above Arctic Research Center in Sodankylä is presented. The time series is produced using a uniform method, presented in the paper, for retrieving the ozone column from the measurements. The data are checked for obvious errors and filtered automatically and manually to ensure that only good-quality data are delivered to public databases. Some features of the time series are highlighted and availability of the measurements is presented.

We present a new real-time experimental setup for analysing in continuum radon emissions over variable stress-strain regimes. The setup consists of a radon accumulation chamber that can host large cylindrical rock samples and is connected to a RAD7 radon monitor. The radon signal is enhanced using a heating system. The accumulation chamber is then placed into a uniaxial testing apparatus that allows obtaining a variety of deformation conditions.