Cohoweb 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 for Voyager2.

This page provides the ability to produce averages, standard deviations and distribution functions for any one of the Voyager2 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).

Note: Voyager magnetometer data past 1989 must be used very carefully due to the very low magnetic field values being measured as compared to the pre-launch magnetometer accuracy requirements. Please click here for details.

Click HERE for more on using this interface.

*Select an activity

     Get distribution function, etc. List data selected

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

* Select variable
Variable Name Min/Max values:(Optional)
Low    High  
Position in HGI
Heliocentric Distance, AU   
HelioGraphic Inertial (HGI) Latitude, deg.   
HGI Longitude, deg.   
Magnetic field, RTN
IMF B Field Magnitude (Scalar), nT   
IMF BR in RTN(Radial-Tangential-Normal), nT   
IMF BT, nT (RTN)   
IMF BN, nT (RTN)   
Plasma, (RTN)
Proton Flow Speed, km/sec   
Proton Flow Elevation Angle/Latitude, (RTN), deg.   
Proton Flow Azimuth Angle/Longitude (RTN), deg.   
Proton Density, n/cc   
Proton Temperature, K   
LECP Proton fluxes(1/(sec-cm**2-ster-MeV)
0.52-1.45 MeV   
3.04-17.3 MeV   
22.0-30.0 MeV   
6-hr CRS Proton fluxes (1/(sec-cm**2-ster-MeV)
3.000-4.600 MeV   
4.600-6.200 MeV   
6.200-7.700 MeV   
7.700-12.800 MeV   
12.800-17.900 MeV   
17.900-30.000 MeV   
30.000-48.000 MeV   
48.000-56.000 MeV   
75.861-82.562 MeV   
130.339 - 154.217 MeV   
154.217 - 171.338 MeV   
171.338 - 193.643 MeV   
193.643 - 208.152 MeV   
208.152 - 245.690 MeV   
245.690 - 272.300 MeV   
272.300 - 344.010 MeV   
344.010 - 478.623 MeV   
478.623 - 598.667 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 COHOWEB system, 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