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https://github.com/beforerr/discontinuity.jl


https://github.com/beforerr/discontinuity.jl

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# Discontinuity.jl

## Overview

A Julia package for reading and processing discontinuity datasets
produced by the
[DiscontinuityPy](https://beforerr.github.io/discontinuitypy) Python
package.

To install the package, run the following command in the Julia REPL:

``` julia
using Pkg
Pkg.develop(url="https://github.com/Beforerr/Discontinuity.jl")
```

## Notations

- $B$ : Magnetic field magnitude

- $\mathbf{B}_{1, LMN}, \mathbf{B}_{2, LMN}$ : Magnetic field vector in
LMN coordinate system before /after the rotation `B.vec.before`
`B.vec.after`

- $ω$ : Rotation/shear angle across the discontinuity

- see Fig.12 in Tsurutani and Smith (1979)
- see Fig.11 in Söding et al. (2001)

- $ω_{in}$ : In-plane rotation angle of the magnetic field `ω_in`

- $L_{n, cross}$ : Thickness (km) of the current sheet using normal
derived from the cross product of the magnetic field vectors at the
boundary `L_n_cross`

- $L_{n, cross} / d_i$ : Thickness (normalized by the ion inertial
length) `L_n_cross_norm`

- $J_{m}$ : Current density (A/m²) `j0_k`

- $J_{m} / J_{A}$ : Current density (normalized by the Alfvénic
current) `j0_k_norm`

Söding, A., F. M. Neubauer, B. T. Tsurutani, N. F. Ness, and R. P.
Lepping. 2001. “Radial and Latitudinal Dependencies of Discontinuities
in the Solar Wind Between 0.3 and 19 AU and -80$^\circ$ and
+10$^\circ$.” *Annales Geophysicae* 19 (7): 667–80.
.

Tsurutani, Bruce T., and Edward J. Smith. 1979. “Interplanetary
Discontinuities: Temporal Variations and the Radial Gradient from 1 to
8.5 AU.” *Journal of Geophysical Research: Space Physics* 84 (A6):
2773–87. .