Provision of a Bz Determination
Abstract
One of the most sought-after parameters is the heliospheric vector magnetic field, because this field interacts with other objects imbedded in the interplanetary medium. These interactions are of primary interest at Earth because a southward interplanetary magnetic field in Geocentric Solar Magnetospheric (GSM) coordinates (Bz negative) can couple with the Earths magnetic field at the boundary of the magnetosphere, causing geomagnetic storms. UCSDs present measurements from the CurrentSheet Source Surface CSSS modeling (Zhao and Hoeksema,1995) arguably give the very best radial and tangential component fields to date at Earth and globally throughout the heliosphere in Sun-centered Heliographic coordinates (HEEQ). We submitted articles Jackson et al., (2015;2016a) showing how all three vector field components in HEEQ can be provided from the CSSS modeling. We also discovered that our regularly-provided CSSS-modeled fields converted to GSM coordinates Bx, By, and Bz on a daily basis provide a prediction of low-level geomagnetic activity. We ready an article (Jackson et al., 2018c)detailing this work that compares our GSM Bz magnetic fields with those from in-situ spacecraft fields for the years 2006 through 2017, and present how this predicts geomagnetic activity and allows excellent few-day ahead forecasts.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 12, 2018
- Accession Number
- AD1059945
Entities
People
- A. Buffington
- B. V. Jackson
- He Yu
Organizations
- University of California, San Diego