This website presents flux averages from the Low Energy Charged Particle
instruments on Voyager 1 and Voyager 2. The PHA data
(pulse height analysis)
from the LECP instruments
have been analyzed to compute 26-day, 52-day, and
annual flux averages
for several species as a function of energy.
All data returned in the Cruise 5a format are included. The covered time period
is Day 228, 1990 to the present
. No planetary flybys are included. Plots are
updated automatically when new LECP MRT data appear on the JHU/APL LECP server.
This occurs approximately weekly.
Two types of plots are available: time-intensity plots
and spectra plots
are shown for H, He, C, and O
energy ranges near 1 MeV, 6 MeV, and 25 MeV
. Click on the top link in the
navigation menu on the left side of this page to obtain thumbnail plots of all
species for both V1 and V2. Click on the thumbnail to obtain a larger plot.
From this frame you may choose plots of 52-day or annual averages, or zoom in on
data from 2000 to the present.
are selected by spacecraft, averaging interval
in the navigation menu.
The bottom section in the navigation menu allows LECP team members to either
view in the browser or download gzipped text files of the Master Database Files
containing the data for all the spectra. A username and password are required.
: the 26-day and 52-day files are very large
Data quality warning
: In order to automate these mission plots, no background
corrections are made
. There are known issues for some of the species at some
energies. Energy intervals were chosen for the time-intensity plots for which
background corrections are thought to be small in most cases. Users of the data
should be in contact with knowledgeable LECP team members.
This Voyager LECP website is maintained by the
University of Maryland Space Physics Group
Scientific contact: Douglas C. Hamilton
Software maintenance: Scott Lasley