3D Meteoroid Trajectories

Fora ASTRO-FORUM NYT FRA VIDENSKABEN 3D Meteoroid Trajectories

  • Dette emne har 0 svar og 1 stemme, og blev senest opdateret for 6 år, 4 måneder siden af Bjarne. This post has been viewed 482 times
Viser 1 indlæg (af 1 i alt)
  • Forfatter
    Indlæg
  • #316333

    Bjarne
    Moderator
      • Super Nova

      3D Meteoroid Trajectories

      Fireball observations from camera networks provide position and time information along the trajectory of a meteoroid that is transiting our atmosphere. The complete dynamical state of the meteoroid at each measured time can be estimated using Bayesian filtering techniques. A particle filter is a novel approach to modelling the uncertainty in meteoroid trajectories and incorporates errors in initial parameters, the dynamical model used and observed position measurements. Unlike other stochastic approaches, a particle filter does not require predefined values for initial conditions or unobservable trajectory parameters. The Bunburra Rockhole fireball, observed by the Australian Desert Fireball Network (DFN) in 2007, is used to determine the effectiveness of a particle filter for use in fireball trajectory modelling. The final mass is determined to be 2.16±1.33 kg with a final velocity of 6030±216 m/s, similar to previously calculated values. The full automatability of this approach will allow an unbiased evaluation of all events observed by the DFN and lead to a better understanding of the dynamical state and size frequency distribution of asteroid and cometary debris in the inner solar system.

       

    Viser 1 indlæg (af 1 i alt)
    • Emnet '3D Meteoroid Trajectories' er lukket for nye svar.