Ice Nucleating Particle number concentration from low-volume sampling over the Southern Ocean during the austral summer of 2016/2017 on board the Antarctic Circumnavigation Expedition (ACE). Data file(s): ACESPACE_ice_nucleating_particles_frozen_fraction_from_LoVol_filters.csv, name_of_filer_sample: Name of filter sample. [-] volume_of_sampled_air(m^3): Volume of air sampled through respective filter between start and end of sampling. [cubic meter] volume_of_water_for_solution(m^3): Volume of ultra-pure water (milliQ) used to wash sampled material off respective filter. [cubic meter] volume_of_droplet_for_freezing(m^3): Volume of a droplet from the washing-off solution that is put into one of 96 compartments of a PCR tray as part of the measurement setup. [cubic meter] fraction_of_frozen_droplets_at__degreeC: Fraction of frozen to un-frozen compartments of the PCR tray used in the freezing array at given temperature T. [-] Null values: NaN