OMNIWeb Data Explorer - Near-Earth Heliosphere Data - NSSDC - Goddard Space Flight Center
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Interface to produce averages, standard deviations and, if desired, distribution functions.

This page provides the ability to produce averages, standard deviations and distribution functions for any one of the OMNI parameters listed below, only for hours when the value of this parameter and/or other parameters satisfy user-specified numeric ranges. Click on left side to specify the output parameter. Enter in the rightside boxes desired minimum and/or maximum value(s) of this and/or any other desired "filtering" parameter(s).

Click HERE for more on using this interface.

*Select an activity

     Get distribution function, etc. List data selected

*Select resolution
     Hourly averaged Daily averaged 27-day averaged

Click here to get time spans for individual parameters.
*Enter start and stop dates (Use yyyyddd or yyyymmdd)&
    Start      Stop

* Select variable
Variable Name Format Min/Max values:
Low    High
Magnetic field
IMF Magnitude Avg (Bs), nT F5.1   
Magnitude, Avg. IMF Vr (Bv), nT F5.1   
Lat. of Avg. IMF, deg. F5.1   
Long. of Avg. IMF, deg. F5.1   
Bx, GSE/GSM, nT F5.1   
By, GSE, nT F5.1   
Bz, GSE, nT F5.1   
By, GSM, nT F5.1   
Bz, GSM, nT F5.1   
sigma-Bs F5.1   
sigma-Bv F5.1   
sigma-Bx F5.1   
sigma-By F5.1   
sigma-Bz F5.1   
Proton Temperature, K F8.0   
Proton Density, n/cc F5.1   
Flow Speed, km/sec F5.0   
Flow Longitude, deg. F5.0   
Flow Latitude, deg. F5.0   
Alpha/Proton ratio F5.3   
Flow Pressure, nPa F5.1   
Sigma-T F5.1   
Sigma-Np F5.1   
Sigma-V F5.1   
Sigma-Flow-Longitude F5.1   
Sigma-Flow-Latitude F5.1   
Sigma-Alpha/Proton Density Ratio F5.1   
Derived Parameters
Electric Field, mV/m F6.2   
Plasma beta F6.2   
Alfven Mach number F5.1   
Magnetosonic Mach number F5.1   
Proton Quazy-Invariant(QI) F6.4   
Kp*10 Index I2   
R Sunspot number (new version) I3   
Dst Index, provisional when? I5   
ap Index, nT I4   
Solar index F10.7 F6.1   
AE Index, provisional when? I4   
PCN index from Thule F6.1   
AL Index, nT I5   
AU Index, nT I5   
Lyman Alpha Solar index F9.6   
Proton Flux* > 1 MEV F9.2   
Proton Flux* > 2 MEV F8.2   
Proton Flux* > 4 MEV F8.2   
Proton Flux* >10 MEV F8.2   
Proton Flux* >30 MEV F8.2   
Proton Flux* >60 MEV

* Specify bin size (width) in units natural to selected parameter
Note: Specify zero (0) to suppress the determination and display of a distribution function

*Advanced plot selections (optional)
Y-axes type: Character size(0.5-2.0):
DF units Image size (pixels): X: Y:


If you have any questions/comments about OMNIWEB system, contact:
Dr. Natalia Papitashvili, Space Physics Data Facility, Mail Code 672, NASA/Goddard Space Flight Center, Greenbelt, MD 20771

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