Coordinated observations of a ~45 g earthgrazing fireball localize thermospheric shock generation to volatile-enhanced hydrodynamic shielding that enables continuum-like flow and detectable infrasound.
Space Science Reviews 84, 327-471,10.1023/A:1005069928850
8 Pith papers cite this work. Polarity classification is still indexing.
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A new three-point inverse solution using the α-β model reconstructs meteoroid masses and bulk densities from limited fireball observations, achieving 88% convergence on the EN catalog and producing a continuous density range of 300-4000 kg m^{-3} instead of discrete PE categories.
Dynamical simulations show mm-sized meteoroids impacting Earth below 17 km/s are mostly asteroidal if released in the last 150-200 kyr, with cometary fraction rising above that speed and dominating above 27 km/s.
High-speed imaging of four lunar impact flashes reveals lower variance in initial intensity than total energy and no correlation between them, suggesting decoupled vapor and ejecta phases.
The 2023 February 27 fireball observed with ALIS_4D has a trajectory and orbit consistent with an Apollo-family asteroid parent body, with a computed strewn field along the Kiruna-Gällivare border in northern Sweden.
Simultaneous optical-radar meteor observations yield new empirical corrections showing mid-velocity showers like the Geminids were overcorrected and high-velocity showers like the Perseids undercorrected in prior CMOR flux calculations.
Analysis of 623 bolides finds 50% infrasound detection rate controlled primarily by entry angle rather than energy, with steeper and lower-altitude events more detectable.
Sakurai blast radius formulation matches observed infrasound periods from OSIRIS-REx reentry with 9% median absolute percentage residual, outperforming Mach-diameter approximation by factor of three.
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Benchmarking Cylindrical Blast Wave Theory Against the OSIRIS-REx Sample Return Capsule Reentry
Sakurai blast radius formulation matches observed infrasound periods from OSIRIS-REx reentry with 9% median absolute percentage residual, outperforming Mach-diameter approximation by factor of three.