The spatial models of radiation of jets of combustion products of rocket engines
Main results
 A software package has been developed for calculating directional spectral emissivity (signatures) of emitting spatial objects of astrophysics and atmospheric physics, based on MonteCarlo simulation methods;
 The principal scientific novelty of the developed program complex is the ability to determine the spectral emissivity of jets, emitting volumes of arbitrary geometry;
 This software package includes an electronic database of spectral optical properties of heated gases and lowtemperature plasma;
 More information may be found in the book (in russian): Surzhikov S.T. Thermal radiation of gases and plasma, Moscow: BMSTU publishing, 2004. 544 p. (Computer models of physical mechanics).
Actual problems
 Creation of a database of spectral optical properties of the emitting gases at high temperatures taking into account the fine structure of the rotational spectrum and the nonequilibrium excitation of molecular components;
 Development of new Monte Carlo algorithms (including algorithms for parallel computing) for calculation of the spectral emissivity with and without consideration of the fine rotational structure;
 Calculation of signatures of emitting objects taking into account fine rotational structure of the spectrum;
 Development of 3dimensional models taking into account the spatial and temporal fluctuations and nonequilibrium radiation.
The development of algorithms of local sampling for simulation of signatures

Temperature of the gas (left) and of the condensed phase (right) in the axisymmetric jet
The temperature of the gas in the block jet
The integral emissivity of the 3 block jet of the first type with a high level of scattering
N_{ph}=10^{6},
where N_{ph}  number of photon
(a)  (b) 
The spectral signature of a tactical missile with fuel based on AP/HTPB:
a) x_{Al2O3}=0.0005, r_{p}=1.0 μm, N_{Al2O3}=4.04*10^{4} cm^{3};
b) x_{Al2O3}=0.05, r_{p}=1.0 μm, N_{Al2O3}=4.25*10^{6} cm^{3}.
The prediction of the spectral directional emissivity of a cylindrical volume (H_{2}O/N_{2}) at high temperatures
(a)  (b) 
Interpretation of ERIM experimental data:
a) Spectral optical model with averaging on 25 cm^{1};
b) Optical model based on the HITRAN data.
The prediction of the spectral directional emissivity of a cylindrical volume (CO_{2}/N_{2}) at high temperatures
(a)  (b)  (c) 
Interpretation of ERIM experimental data (results were obtained using temperature extrapolated HITRAN data):
a) Averaging over the rotational structure (JLBL=0, JSUM=1);
b) Averaging over the rotational structure (JLBL=0, JSUM=0);
c) A statistical model of the rotational lines (JLBL=3).
The prediction of the spectral directional emissivity of a cylindrical volume (CO_{2}/N_{2}), weakned by a cold gas
(a)  (b) 
Interpretation of ERIM experimental data (results were obtained using temperature extrapolated HITRAN data):
a) A statistical model of the rotational lines (JLBL=2, approximation of the weak line),
a spectral group model 25 cm^{1};
b) A statistical model (JLBL=2), a spectral group model 25 cm^{1}.
The prediction of the spectral directional emissivity of a cylindrical volume (CO_{2}/N_{2}), weakned by a cold gas
Interpretation of ERIM experimental data. Linebyline calculations with the spectral resolution of 0.0083 cm^{1}