ANITA2 Multicomponent Air Analyser – 3 Years of Operation on ISS and planned improvements

The ANITA2 (Analysing Interferometer for Ambient Air) instrument is a trace gas analyser on board the ISS to monitor cabin atmosphere. ANITA2 has been built in a contract between ESA, OHB and SINTEF commissioned in Q1 of 2022. Since then, ANITA2 is monitoring the ISS gas environment providing detailed analysis for more than 40 gases in real time every 6 minutes. This paper is reporting the operations, hardware behaviour, reliability and expected remaining lifetime of ANITA2. Additionally, it is discussed how the ANITA system can be further improved to make the system suitable for long duration missions. This includes an ORU concept, measures against lunar dust and radiation hardening of the systems.