Cohoweb Data Explorer - Near-Earth Heliosphere Data - NSSDC - Goddard Space Flight Center
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Interface to produce Plots, listings, output files for STEREO-A


This page provides the ability to plot or list (or create a file of) any selection of the parameters listed below.

Note1: There is a big gap 2014/12/16 - 2015/07/20 in plasma data
Note2: There is a big gap 2015/03/21 - 2015/07/09 and 2015/10/27 - 2015/11/15 in mag data

*Select an activity

Plot data List data Create file

*Select resolution
     Hourly averaged Daily averaged

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

* Select variable
Position in HGI
Heliocentric Distance, AU
HelioGraphic Inertial (HGI) Latitude, deg.
HGI Longitude, deg.
Magnetic field in RTN (Radial-Tangential-Normal) coordinate system
Field Magnitude Average, nT
Plasma in RTN (Radial-Tangential-Normal) coordinate system
Proton Flow Speed, km/sec
Proton Flow Elevation Angle/Latitude, deg.
Proton Flow Azimuth Angle/Longitude, deg.
Proton Density, n/cc
Proton Temperature, K

LET Proton fluxes (1/(sec-cm**2-ster-MeV)
1.8-3.6 Mev
4.0-6.0 Mev
6.0-10.0 Mev
10.0-12.0 Mev
HET Proton fluxes (1/(sec-cm**2-ster-MeV)
13.6-15.1 MeV
14.9-17.1 MeV
17.0-19.3 MeV
20.8-23.8 MeV
23.8-26.4 MeV
26.3-29.7 MeV
29.5-33.4 MeV
33.4-35.8 MeV
35.5-40.5 MeV
40.0-60.0 MeV
60.0-100.0 MeV

SIT Proton fluxes(1/(sec-cm**2-ster-MeV)
0.320 - 0.452 MeV
0.452 - 0.640 MeV
0.640 - 0.905 MeV
0.905 - 1.280 MeV
1.280 - 1.810 MeV
1.810 - 2.560 MeV
2.560 - 3.620 MeV

*Advanced plot selections (optional)
Y-axis Scale: Y scale range (for only one selected parameter)
min value max value
Character size(0.5-2.0): Symbol Size(0.1-4.0):
Plot Symbol: 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