Credit: Me :D

Meteors and space objects:
science updates


Daniel Kastinen

Johan Kero, Jhassmin Aricoche, Tsz-Hin Heung, Hampus Andersson

Signe Stjernstoft, Matej Suhajda, Katrina Yzabel Baladjay

Credit: Me :D

Meteors and space objects:
science updates

So what are meteors and space objects?

Video: Kiruna IRF AllSky7 meteor camera

So what are meteors and space objects?

So what are meteors and space objects?

Meteors and space objects:
science updates

Ongoing projects within

  • Meteors, meteoroids, and dust
  • Space debris
  • Asteroids and comets
  • Solar system dynamics
  • Mesosphere and lower thermosphere
  • Tools and synergy

Ongoing projects within

  • Meteors, meteoroids, and dust

Fitting ablation models to observational data

Collaboration: Maria Gritsevich, Ellie Sansom, (two paper drafts)

Meteoroid's equations of motion $$ M\frac{dV}{dt}=-\frac{1}{2}c_{d}\rho_{a}V^{2}S $$ $$ \frac{dh}{dt}=-V\sin \gamma $$ $$ H^{\ast }\frac{dM}{dt}=-\frac{1}{2}c_{h}\rho _{a}V^{3}S $$

Fitting ablation models to observational data

Meteoroid's equations of motion $$ M\frac{dV}{dt}=-\frac{1}{2}c_{d}\rho_{a}V^{2}S $$ $$ \frac{dh}{dt}=-V\sin \gamma $$ $$ H^{\ast }\frac{dM}{dt}=-\frac{1}{2}c_{h}\rho _{a}V^{3}S $$

Analytic solution possible:

Fitting ablation models to observational data

Analytic solution possible:

$$ m(v)=\exp (-\beta \frac{1-v^{2}}{1-\mu }) $$ $$ y(v)=\ln 2\alpha +\beta -\ln (\overline{E}i(\beta )-\overline{E}i(\beta v^{2})) $$

$\alpha$ = ballistic coefficient, $\beta$ = mass loss parameter

Fitting ablation models to observational data

Different models
&
Different ways to fit the model

Fitting ablation models to observational data

Fitting ablation models to observational data

Fitting ablation models to observational data

Fitting ablation models to observational data

Fitting ablation models to observational data

What about the radar cross section?

Ongoing projects within

  • Meteors, meteoroids, and dust

Modelling plasma production during ablation

Collaboration: Meers Oppenheim (Boston University)
Student internship: Katrina Yzabel Baladjay

Dyrud et al. 2008

Modelling plasma production during ablation

Dyrud et al. 2008

Modelling plasma production during ablation

Analytic solution possible:

$$ n_{p} = \frac{8\pi r_M^2 n_0 n_a}{\sqrt{3}} \left ( 1 + \frac{m_m}{m_A} \right ) G_{ion}(U) \frac{ D(R, \theta) }{R} $$ $$ D(R, \theta) = f_1(R, \cos(\theta)) |\cos(\theta)| + f_2(R) \cos(\theta) + f_3(R, \cos(\theta)) $$

$G_{ion}$ = differential cross section for ionizing collisions

Modelling plasma production during ablation

Analytic solution possible:

$$ f_3(R, \cos(\theta)) = \int_{|\cos(\theta)|}^1 \sqrt{1 + \frac{2 \xi_0^{\frac{2}{3}}}{\pi} \left ( \frac{R}{\lambda_T} \right )^{\frac{2}{3}} } \text{exp} \left ( - \frac{3 \xi_0^{\frac{2}{3}}}{2} \left ( \frac{R}{\lambda_T} \right )^{\frac{2}{3}} \right ) \\ \times \sqrt{\frac{\xi_0^2 - \cos^2(\theta)}{1 - \xi_0^2}} \mathrm{d}\xi_0 \\ + |\cos(\theta)| \int_{|\cos(\theta)|}^1 \sqrt{1 + \frac{2 \xi_0^{\frac{2}{3}}}{\pi} \left ( \frac{R}{\lambda_T} \right )^{\frac{2}{3}} } \text{exp} \left ( - \frac{3 \xi_0^{\frac{2}{3}}}{2} \left ( \frac{R}{\lambda_T} \right )^{\frac{2}{3}} \right ) \\ \times \text{arcsin} \left ( \frac{\sqrt{1 - \xi_0^2} |\cos(\theta)|}{\xi_0 \sqrt{1 - \cos^2(\theta)}} \right ) \mathrm{d}\xi_0 $$

Ongoing projects within

  • Meteors, meteoroids, and dust

Make databases for MAARSY, MU, PANSY radars

todo - hampus, Juha (maarsy and pansy addon)

todo - describe mu, maarsy, pansy and addon

Ongoing projects within

  • Meteors, meteoroids, and dust

New meteor camera network

todo - global meteor network, allsky7, steianr, eric, jakko, ...

todo - new meteor camera map and deployment plan

Ongoing projects within

  • Meteors, meteoroids, and dust

ALIS_4D meteor observations - first event

todo - paper on the way, tima, urban, brazil, jakko, ...

todo - planning for differential ablation filters next season?

Meteors and space objects:
science updates

Ongoing projects within

  • Meteors, meteoroids, and dust
  • Space debris
  • Asteroids and comets
  • Solar system dynamics
  • Mesosphere and lower thermosphere
  • Tools and synergy

Ongoing projects within

  • Space debris
  • NOSTRA (report and paper on way, next project soon)
  • Building tools for data analysis and experiment planning
  • building pipelines for EISCAT 3D (phd student), inonospheric propagation, multi purpose experiments, processing software
todo - expand on each

Meteors and space objects:
science updates

Ongoing projects within

  • Meteors, meteoroids, and dust
  • Space debris
  • Asteroids and comets
  • Solar system dynamics
  • Mesosphere and lower thermosphere
  • Tools and synergy

Ongoing projects within

  • Asteroids and comets
  • Implementing cometary sublimation models to model streams (maybe paper by end of year)
  • RAMSES and EISCAT observations, minimoons (funding tbd)
todo - expand on each

Meteors and space objects:
science updates

Ongoing projects within

  • Meteors, meteoroids, and dust
  • Space debris
  • Asteroids and comets
  • Solar system dynamics
  • Mesosphere and lower thermosphere
  • Tools and synergy

Ongoing projects within

  • Solar system dynamics
  • Chaos indicators for observed meteoroids (master thesis + paper)
  • Better tooling for dynamical meteoroid simulations (internship)
  • Detecting non-gravitational effects in meteoroid streams with radars (UiT collaboration, master thesis, paper)
todo - expand on each

Meteors and space objects: science updates

Ongoing projects within

  • Meteors, meteoroids, and dust
  • Space debris
  • Asteroids and comets
  • Solar system dynamics
  • Mesosphere and lower thermosphere
  • Tools and synergy

Ongoing projects within

  • Mesosphere and lower thermosphere
  • Proposal to national phd school with linda - observations supporting estimation of atmospheric impacts of antrhopogenic input
  • meteor radar - (managed by xx, might do more with data at later stages)
todo - expand on each

Meteors and space objects:
science updates

Ongoing projects within

  • Meteors, meteoroids, and dust
  • Space debris
  • Asteroids and comets
  • Solar system dynamics
  • Mesosphere and lower thermosphere
  • Tools and synergy

Ongoing projects within

  • Tools and synergy
todo: some sort of overview of all software, projects, instruments and how they connect? todo: software diagram todo: tooling vision - current status