ENLIL Solar Wind Prediction
This site presents results from an experimental, real-time simulation
of the background solar wind:
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VELOCITY.
Solar wind velocity on three slices passing through Earth
-
DENSITY.
Solar wind density on three slices passing through Earth
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EVOLUTION.
Evolution of parameters at Earth, planets, and spacecraft
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STREAM.
Solar wind stream predictions at Earth
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STEREO.
Synthetic white-light HI-2 images
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BOUNDARY.
Solar wind source conditions at 0.1 AU
These results are updated at around 04:00, 10:00, 16:00, and 22:00 UTC.
Solar wind between 0.1 and 1.1 AU is simulated by:
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ENLIL solar wind code.
The numerical code ENLIL (Sumerian god of wind and storms)
is a research tool for simulations of corotating and transient
solar wind disturbances.
The physical model is based upon the ideal magnetohydrodynamic (MHD)
description and the numerical scheme is an explicit high-resolution
TVD Lax-Friedrichs scheme.
The real-time ENLIL application is driven by:
-
Wang-Sheeley-Arge (WSA) model.
This model uses observations of the photospheric magnetic
field, potential field source surface (PFSS) and Shatten current sheet
(SCS) models, and an empirical formula to derive the radial magnetic
field and flow velocity.
ENLIL uses output from a research version of the WSA model driven by
the GONG observations and constructs solar wind source conditions
at 0.1 AU.
Note that a single, corotating map is used to drive the simulation.
and uses the following data sets:
-
Trajectories of planets and spacecraft.
These positions are used during ENLIL computations to store
values of the solar wind density, velocity, temperature, and
magnetic field, and they are also displayed on the global solar
wind plots.
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ACE Real Time Solar Wind.
Values of the solar wind density, velocity, temperature, and
magnetic field are overlaid on plots showing the evolution of
parameters at Earth to indicate the accuracy of the numerical
simulation.
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STEREO Real Time Solar Wind.
Values of the solar wind density, velocity, temperature, and
magnetic field are overlaid on plots showing the evolution of
parameters at Stereo A and B spacecraft to indicate the accuracy
of the numerical simulation and (Stereo B) to predict values at Earth.
This is a page in progress.
Please send questions and comments to
Dusan.Odstrcil@nasa.gov
from
George Mason University - Space Weather Laboratory
and
NASA/GSFC - Space Weather Laboratory
.
Acknowledgments: This work has been supported in part by
AFOSR/MURI, NASA/LWS, NASA/STEREO, NSF/CISM, and NSF/SHINE projects.