OMNIWeb Plus Browser
to browse data as part of data selection or to create subsetted files
LANL PLASMA DATA FROM IMP-8 (2-min. resolution)

This home page provides access to the IMP-8 2-minute resolution data set which was validated at SPDF (removing some of spikes., rversal time tags, etc. from the Electrostatic Analyzer instument provided over the years by Los Alamos National Laboratory (LANL). Magnetosheath data were excluded from the 2-min data by LANL.
The original ASCII data set is placed at SPDF's anonymous FTP site in directory
At this directory a user can find a description of the data .

* Plot and listing of hourly LANL plasma parameters

Time span 1973-11-04 - 2001-10-22

Please enter your selections and then click on the Submit button.

*Select an activity
    Plot data List data Create file (file?)

*Enter start and stop dates (Use yyyyddd or yyyymmdd)
    Start      Stop

*Select variables
Spacecraft radial distance (Re)
Spacecraft latitude, deg., GSE
Spacecraft GSE longitude, deg., GSE
Proton density, N/cm^3
Proton flow speed, km/s
Proton flow azimuth, deg.
Proton Tpar (Tmax) temperature, deg. K
Proton Tperp (Tmin) temperature, deg. K
Proton pressure tensorsymmetry axis, deg.
Alpha/proton abundance ratio
Relative alpha-to-proton flow speed, km/sec
Relative alpha-to-proton flow azimuth, deg.
Alpha temperature/proton temperature
Alpha temperature anisotropy (Tmax/Tmin)
Alpha pressure tensor symmetry axis, deg.

*Advanced plot selections (optional)
Max days/panel:(01-30)
Y-axis Scale: Character size(0.5-2.0):
Plot Symbol: Symbol Size(0.1-4.0): Image size (pixels) X: Y:

If you have any questions/comments about the OMNIWeb Plus Browser, contact: Dr. Natalia Papitashvili, Mail Code 672, NASA/Goddard Space Flight Center, Greenbelt, MD 20771

NASA Official: Robert Candey (, Head of the Space Physics Data Facility