IMF control of electron aurora across Mars' crustal magnetic fields: Insights into electron sources

We investigate Martian electron aurora utilizing 130.4 nm auroral observations from the Emirates Mars Ultraviolet Spectrograph and IMF clock angle measurements and estimates from MAVEN. Analysis reveals that >5 R aurora occurrence in a given region can vary by up to a factor of seven with IMF orientation, generally highest for southward IMF and lowest for westward IMF, with higher auroral occurrence post-dusk, decreasing toward and past midnight before increasing again towards dawn. A broad diversity of IMF and local time dependence of aurora occurrence is observed across Mars’ crustal magnetic fields. The polarity of a given crustal field determines whether its field lines preferentially magnetically connect to dayside ionospheric or nightside magnetotail electron sources in the post-dusk or pre-dawn sectors. We thus establish a “source preference metric”, i.e., the excess likelihood of aurora when likely magnetically connected to the nightside versus dayside. A wide range of source..., , # Data from: IMF control of electron aurora across Mars' crustal magnetic fields: Insights into electron sources

Dataset DOI: [10.5061/dryad.vt4b8gv4x](10.5061/dryad.vt4b8gv4x)

## Description of the data and file structure

The 3D MHD simulation outputs span from **07:00 to 07:20 UT on November 15, 2022**, with files saved at **one-minute intervals**.

Each file name encodes the time information in the format:\
`t000hhmm00_nxxxxxxx.dat.gz`

The outputs are stored in **ascii format**, and each file contains the following plasma variables in order:

`\"X [R]\" \"Y [R]\" \"Z [R]\" \"B_x [nT]\" \"B_y [nT]\" \"B_z [nT]\" \"B1_x [nT]\" \"B1_y [nT]\" \"B1_z [nT]\"`

Of those variables, X, Y, Z: location in MSO coordinate; B_x, B_y, B_z: total magnetic field vector in MSO, and B1_x, B1_y, B1_z: induced magnetic field in MSO. The crustal magnetic field is given by the vector subtraction of the induced field from the total field. 

* 3d__ful_1_t00070000_n1745129_B.dat.gz
* 3d__ful_1_t00070100_n1748841_B.dat.gz
*...,