The PGH rate consists of greater than 70 MeV/nuc nuclei, primarily protons, and is a good indicator of the level of modulation of galactic cosmic rays. It can also respond to large solar flares.

For a list of excluded times please see Excluded Times for Voyager-1.

The Voyager-1 Cosmic Ray Subsystem instrument heater was turned off on Day 138 (05/18/2022) as part of the new power management plan.

Postscript and PDF versions are available through the links under each figure.

Voyager-1 PGH Rate (3 months) PS  |  PDF  |  Data Listing

Voyager-1 PGH Rate (12 months) PS  |  PDF  |  Data Listing