Drossart et al. sun ba da rahoton gano layin H + 3 na farko a cikin 1989 wanda aka samo a cikin ionosphere na Jupiter. Drossart ya sami jimlar layin H + 3 23 tare da ginshiƙan ginshiƙai na 1.39 × 109 / cm2. Ta amfani da waɗannan layin, sun sami damar sanya zafin jiki ga H + 3 na kusan 1,100 K (830 ° C), wanda ya dace da yanayin da aka ƙayyade daga layin fitarwa na wasu nau'ikan kamar H2. A 1993, an sami H + 3 a Saturn ta Geballe et al. da kuma Uranus ta Trafton et al. Tambaya: Menene ginshiƙan ginshiƙan 23 H = 3 da Drossart ya samo?
1.39 × 109/cm2