2.4.1 spase://CNES/Instrument/CDPP-AMDA/Giotto/JPA JPA Johnstone Plasma Analyser 2009-05-20T21:10:13Z One of two plasma experiments to study the solar wind and charged particles. This instrument measures the three-dimensional energy distribution of positive ions in order to study the interaction between the solar wind and ionised cometary particles. spase://SMWG/Person/Alan.D.Johnstone PrincipalInvestigator Spectrometer Johnstone Plasma Analyser spase://CNES/Observatory/CDPP-AMDA/Giotto