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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.

Kero-Szasz ablation sweep

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

The example setup is:

import numpy as np
import metablate.models.kero_szasz_2008 as ks
from spacecoords import frames

lat = 67.0
lon = 20.0
alt = 100e3
reference_pos_ecef = frames.geodetic_wgs84_to_ecef(lat, lon, alt, degrees=True)
velocity_dir_ecef = frames.azel_to_ecef(lat, lon, az=10, el=-45, degrees=True)

model = ks.KeroSzasz2008(
    options=ks.KeroSzaszOptions(
        material=mat.cometary,
    ),
)

result = model.run(
    parameters=ks.KeroSzaszInitialState(
        epoch=np.datetime64("2018-06-28T12:45:33"),
        position_ecef=reference_pos_ecef,
        velocity_ecef=velocity_dir_ecef * 60e3,
        mass=1e-6,
    ),
)

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()"