Theoretical Refinements to the Heliospheric Upwind eXtrapolation Technique and Application to in-situ Measurements

Evaluating the Heliospheric Upwind eXtrapolation (HUX) Technique developed by Riley et al. [1, 2] to map solar wind streams radially between different regions in the heliosphere. This study leverages observations from Helios (A and B) and Earth based spacecrafts (OMNI) to test the HUX technique with in situ data. Moreover, in an attempt to enhance the standard HUX method, we propose flux-limiter numerical schemes that accurately capture compression and rarefaction waves.

References

[1] Riley, P. and Lionello, Roberto. Mapping solar wind streams from the Sun to 1 AU: A comparison of techniques. Solar Physics, 270(2), 575–592, 2011.

[2] Riley P and Issan O (2021) Using a Heliospheric Upwinding eXtrapolation Technique to Magnetically Connect Different Regions of the Heliosphere. Front. Phys. 9:679497. doi: 10.3389/fphy.2021.679497

Dependencies

1. Python >= 3.7
2. numpy >= 1.19.1
3. matplotlib >= 3.3.1
4. scipy >= 1.5.0
5. pyhdf >= 0.10.2
6. psipy >= 0.1.1
7. heliopy >= 0.15.3

Data

All data from in-situ spacecraft observations and MHD model results can be downloaded using PsiPy and HelioPy.

Authors

Predictive Science Inc.

• Pete Riley, pete@predsci.com

• Opal Issan, oissan@predsci.com

Correspondence:

Pete Riley, Predictive Science, Inc., San Diego, California, USA. pete@predsci.com

License

MIT