A set of Meteorological Airborne Science INstrumentation (MASIN) on board the British Antarctic Survey (BAS) twin-otter aircraft.
The instrument suite includes standard temperature and water vapour sensors as well as a turbulence probe allowing full atmospheric profile measurements of temperature, dew point and winds. A DMT Cloud and aerosol spectrometer (CAPS) probe is used for cloud studies. There is also a closed path Licor H2O/CO2 instrument, Grimm optical particle counter and cloud condensation nuclei counter fed from simple Rosemount inlets.