The Cosmic Ray Subsystem team has made available plots and listings of 6-hour averages of two counting rates, PGH and LA1. 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. The LA1 rate consists of greater than 0.5 MeV/nuc nuclei, principally protons, and is sensitive to low-energy phenomena in interplanetary space (e.g., co-rotating interaction regions, associated enhancements and solar flares).

The most recent 6-hour averaged figures for the LA1 and IPGH Rates can be displayed by selecting the thumbnail images below.

These figures are usually updated Monday - Friday by 12:00 PM EST. If the creation date in the lower left corner is not today's or yesterday's date you may be viewing a cached copy. Reload the page to get the latest figures.

Voyager-1 LA1 Rate

Voyager-1 IPGH Rate

Voyager-2 LA1 Rate

Voyager-2 IPGH Rate

The time-history data listing of these two rates can be displayed by selecting the desired space craft, rate, time-period, and display mode in the following interface.

Voyager- 1 2 Rate > 70 MeV/nuc Ions > 0.5 MeV/nuc Ions
Most Recent 3-months 12-months Output Type list plot
Select Time Format for Listing ISO y doy h float_year year float_doy

TIME FORMAT OPTIONS
ISO	YYYY-MM-DDTHH:MM:SS	2001-01-31T00:00:00
Y DOY H	YYYY DOY HH	2001 1 0
FLOAT_YEAR	Fractional YEAR	2001.000000
YEAR FLOAT_DOY	YYYY Fractional DOY	2001 1.000

Return to the Voyager Cosmic Ray Subsytem page.