The UAH Predictions of the Solar Wind and Magnetic Field at the Parker Solar Probe during Solar Encounter 27 (2026-03-12)

1. Model

The MS-FLUKSS heliospheric MHD model is coupled with the WSA model (Kim et al. 2020), which used ADAPT-GONG input magnetograms, with the PFSS source surface height and the WSA outer boundary at 2.5 and 9 solar radii, respectively. The MHD model propagates the solar wind from 9 solar radii to 236 solar radii (1.1 AU) to fully enclose the PSP trajectory. Hence, field line tracing from PSP to the solar surface is performed through the MHD domain down to 9 solar radii instantaneously at approximately 1 hour cadence, where the origin of the field line on the photosphere is already known in the WSA model. See Badman et al. (2023) for details.

2. Data

There is one set of data files as described below:

(A) "PSP_AGONG_R000.dat" - "PSP_AGONG_R011.dat": MS-FLUKSS simulation results extracted along the PSP trajectory labeled by the input magnetogram (each of the 12 realizations of ADAPT-GONG) for the WSA model. 

3. Figures

There is a pdf file showing plots of predicted Br, Vr, density, and temperature at PSP for the 12 realizations:: uah_psp_e27_20260312_agongWSAmhd.pdf.

A plot showing the footpoint prediction results projected onto the solar disk is available at the PSP science gateway (https://psp-gateway.jhuapl.edu/website/SciencePlanning/MissionEvents/, under “Encounter 27”) and the Whole Heliosphere and Planetary Interactions Campaigns (https://whpi.hao.ucar.edu/whpi_campaign-psp27p.php).