Meteoroid Ablation Models

Install

    pip install ablate

Minimal micrometeoroid ablation model example

The example below runs the built-in AtmPymsis atmosphere with the KeroSzasz2008 ablation model and recreates a compact sweep over entry elevation angle and velocity.

python docs/examples/ablation_sweep.py --output docs/assets/kero_figure1_example.png

The core setup is:

import numpy as np
import metablate

model = metablate.KeroSzasz2008(
    atmosphere=metablate.atmosphere.AtmPymsis(),
    config={
        "options": {
            "temperature0": 290,
            "shape_factor": 1.21,
            "emissivity": 0.9,
            "sputtering": False,
            "Gamma": 1.0,
            "Lambda": 1.0,
        },
        "atmosphere": {"version": 2.1},
        "integrate": {
            "minimum_mass_kg": 1e-13,
            "max_step_size_sec": 5e-2,
            "max_time_sec": 5.0,
            "method": "RK45",
        },
    },
)

result = model.run(
    velocity0=53e3,
    mass0=1e-8,
    altitude0=130e3,
    zenith_ang=45.0,
    azimuth_ang=0.0,
    material_data=metablate.material.get("cometary"),
    time=np.datetime64("2018-06-28T12:45:33", "ns"),
    lat=69.30,
    lon=16.04,
    alt=100e3,
)

matplotlib backends

on arch to get matplotlib to work

pip install Qt5Agg

and add a ~/.config/matplotlib/matplotlibrc with backend:qt5agg.

see https://matplotlib.org/stable/tutorials/introductory/usage.html#backends

msise00 atmospheric model

make sure cmake is installed! sudo pacman -S cmake and also gfortran sudo pacman -S gcc gcc-fortran and the basic libs sudo pacman -S base-devel

if compilation fails use the enviormennt variables, for bash export FC="/usr/bin/gfortran" in fish set -x FC "/usr/bin/gfortran". If cmake still tries to use gcc for compilation, make sure to remove the build folder under my_env/lib/pythonX.X/site-packages/msise00/build so that no cached files override the enviornment variables.

    mkdir /my/env/msise00_source
    cd /my/env/msise00_source
    git clone https://github.com/scivision/msise00
    cd msise00
    pip install -e .
    python -c "import msise00; msise00.base.build()"

or

pip install git+git://github.com/space-physics/msise00.git@main
python -c "import msise00; msise00.base.build()"