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Space Objects Interaction

#1074


Study of Space Object Interaction with the Earth's Atmosphere

Tech Area / Field

  • SAT-SAF/Space Safety/Space, Aircraft and Surface Transportation

Status
3 Approved without Funding

Registration date
14.08.1997

Leading Institute
VNIITF, Russia, Chelyabinsk reg., Snezhinsk

Project summary

The objective of this project is to study to process of interaction of space object with the Earth’s atmosphere, develop appropriate physical-mathematical model and technique for solving the problem on determining chemical composition distribution for a primary flow of meteoroids (before their entry in the atmosphere) using as a basis chemical composition distribution of meteorites. This problem is of fundamental importance for a number cosmogonic theories.

Project is expected to result in derivation of simulation-theoretical, description for the effect of “burst” of high-speed meteoroids in Earth’s atmosphere. By now this phenomenon has been explained only qualitatively. On the basis of the offered model the estimation of parameters and the critical sizes of space objects of different types at which meteoroids fragments reach an Earth’s surface, and a fragmentation degree will be carried out. Also dependence of height of explosion on initial speed and the size will be obtained.

Primary efforts under the project will be focused at simulation-theoretical studies based on available and developed physical models and codes.

Activities under the project are expected to give the follow results which will be presented in the form of reports, papers and publications:


· Analysis of modern data on chemical composition, density, shock wave and elastic plastic characteristics of the meteorites and comets;
· development of models for three types of meteoroids (stony, stony-iron, iron) and model of comet body;
· development of theory for space object interaction with the Earth’s atmosphere based on results of numerical simulations;
· evaluation of critical velocities, parameters of entry in the atmosphere and critical sizes of space objects of different types with enable fragments of meteoroids and comets to reach the Earth’s surface;
· feasibility assessment for determining chemical composition distribution for a primary flow of meteoroids (before their entry in the atmosphere) based on chemical composition distribution of meteorites;
· evaluation of effects accompanying space object interaction with the Earth’s atmosphere (shock wave, luminous radiation, electromagnetic radiation).

The basic result received during activities under the project, will be construction of the theory of explosive retardation and fragmentation of space objects in Earth’s atmosphere and its experimental confirmation by results of mathematical modeling. On the basis of the constructed theory quantitative characteristics of attendant effects will be received. Possible applications of the constructed theory:


· Received critical meteoroids parameters, representing danger to the Earth, are necessary for survey programs for definition of an opportunity of protection of the Earth from space objects.
· Prediction estimation of a chemical compound of an initial meteoroids stream may be used by experts by consideration of cosmogonic theories of an origin of planets.
· Application of developed theory to describing space object interaction with the atmosphere of the other planets.

Complexity of the formulated problem and the wide range of tasks arising at its solution, need use of experience and knowledge of highly skilled experts - physicists, mathematicians, programmers. The collective of scientists which efforts is planned to solve formulated tasks, has wide experience for the decision of the similar problems arising during development of the nuclear weapon. Using of their knowledge during work on the project will allow them to reorient the creative forces for the decision of one of the fundamental problems facing modern science. The project also will allow building up long-term cooperation with foreign scientists for realization of joint researches.


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