By G. Peterson
The capability risk posed by way of Leonid meteoroids to orbiting spacecraft over the subsequent a number of years demands new dynamic mitigation options to aid the satellite tv for pc neighborhood in decreasing the chance to its automobiles. This ebook bargains planned dynamic mitigation techniques to counterpoint the conventional protective techniques, offering venture operators extra how one can lessen the risk. 5 various perspective keep watch over and orbit maneuvering recommendations are tested intimately. the data is gifted in algorithmic shape to permit technically efficient, yet meteoroid green, operators to simply comprehend the phenomena, determine the chance, and enforce procedures.
- info and data showing during this publication are for informational reasons in simple terms. AIAA and the writer aren't answerable for any harm or harm caused by use or reliance, nor do AIAA and the writer warrant that use or reliance can be unfastened from privately owned rights.
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Extra resources for Dynamics of Meteor Outbursts and Satellite Mitigation Strategies
Example text
The angle LPtimal is that zeta angle derived for the optimal case (Fig. 6) and the angle Z; (Fig. , how close to the optimal condition does the orbit plane come). The closest point of the orbit to the approach vector is produced by a right angle in a spherical sense. The angles and Lptimal are found from known quantities (Eqs. 6], respectively). 14) Substituting the appropriate expressions, the angle Z;* can be found, and Eq. 15) h Fig. 9. Orbital arc for suboptimal node. 38 The Geometry of Shadows: Meteoric Eclipses where the dot product in terms of the orbit elements is found from Eq.
L+sw - Add in random velocities near perihelion to simulate the particle cloud evolution: "eject = 3. Compute the once-per-rev radiant point from the relative velocity at point of closest approach: - v,sinusinQ aL = vre, + v,cosucosQcosi - vg sinucos Q-v,cosu sin R cos i 1 vreI ;+ v,cosusini 6, = sin-' 4. 3 10-3 ~ v: Electrostatic discharge is dimcult to quantify since any charge is potentially dangerous depending upon the latent charge already on the spacecraft. 5 . Compute the particle flux for all particles of this size mass and larger: QT = k,,ZHR m , ' - F 6.
13 shows this expression for both the Leonid shower and the expected worst-case outbursts of 1998-2000 (Appendix B data were used for the Leonid activity curve with a ZHR of 10,000). Since the ZHR is time-varying, Eq. 44) is computed in I-hour intervals over which the ZHR is assumed constant for the shower, and in 10-minute intervals over the course of the expected storm. The number of impacts is also normalized with respect to the spacecraft area in order to keep the results general. The impact probabilities are therefore potentially high during the time of the storm.