Voyager 1
26 day Average, Hydrogen, 1987-Present
26 day Average, Helium 1987-Present
26 day Average, Carbon, 1987-Present
26 day Average, Oxygen, 1987-Present
Voyager 2
26 day Average, Hydrogen, 1987-Present
26 day Average, Helium 1987-Present
26 day Average, Carbon, 1987-Present
26 day Average, Oxygen, 1987-Present