This work is in the public domain in the United States, because it was in the public domain in its home country (Russia) on the URAA date (January 1, 1996), and it wasn't re-published for 30 days following initial publications in the U.S. This work is an information report (including photo report), which was created by an employee of TASS, ROSTA, or KarelfinTAG as part of that person’s official duties between J and January 1, 1946, provided that it was first released in the stated period or was not released until August 3, 1993.(b) which was created by legal entity between Januand January 1, 1946, provided that it was first shown in the stated period or was not shown until August 3, 1993.(a) which was first shown before Janu or.This work is a film (a video fragment or a single shot from it):.(b) between Januand January 1, 1946, and the name of the author did not become known during 70 years after publication, counted from January 1 of the year following the year of publication.
TUNGUSKA METEOROID CODE
231-FZ of the Russian Federation of Decem(the Implementation Act for Book IV of the Civil Code of the Russian Federation). This provides a valuable constraint on initial radius for complementary Tunguska studies, such as blast-wave simulations that aim to reproduce the tree-fall pattern.This work is in the public domain in Russia according to article 1281 of the Civil Code of the Russian Federation, articles 5 and 6 of Law No. The resulting optimal initial radii were between 30 and 45 m for the entire range of cases considered. Using this approach, the initial radius resulting in good agreement with the measured radiant burn footprint was found for a range of maximum debris cloud radii, entry angles, and velocities. Comparing this simulated footprint with the measured radiant burn area provides a metric for assessing unknown Tunguska entry parameters. This correlation is then applied to potential Tunguska entry trajectories to provide a simulated ground heating footprint. The resulting simulated radiative flux values are correlated as a function of velocity, altitude, view angle, and meteoroid radius. The impact of ablation on the ground radiative flux is negligible because the ablation products are limited to the optically-thick core of the wake. Looking at the meteor along the flight path (head-on) results in lower radiative heating because it reduces the wake field of view, where the large radiating wake is shown to provide a significant contribution to the radiative flux (when viewed from the side). The impact of the meteor view angle is shown to significantly impact the radiative flux. This model applies recently developed computational fluid dynamic simulations, which include the impact of ablation and radiation on the shock-layer flowfield, and ray-tracing radiation transport with atmospheric absorption. The area of radiant burn measured for the Tunguska event provides a test case for the developed model. This paper develops a model for simulating the radiative flux reaching the ground originating from a meteor shock-layer and wake.
0 kommentar(er)
