Ecology and Circumterrestrial Space

Direct photometric problem of optical monitoring of objects in circumterrestrial space

“…As expected, this function describes satisfactorily light scattering by coatings of artificial surfaces and technogenic debris [9,10].…”

“…When solving the direct photometric problem for artificial satellite objects, shadowing should be taken into account irrespective of the reflection type [4]. Figure 2 shows the phase curves for a cylindrical specular model of artificial satellite objects (curves 6 and 7), cylindrical model with glass-cloth surface (curves 1-3), and cylindrical models with surfaces covered by СаСО 3 (curve 4) and etched (curve 5) measured by the author in model experiments [5,6,[8][9][10]. For a comparison, the phase curve of the diffuse Lambertian cylinder and the curves calculated for the Hapke function described by Eq.…”

“…Model experiments [6,9,10] and observations of specular reflections of different types from the solar batteries of a number of space vehicles [3,15] allowed us to estimate the actual angular diameter in which the specular light-flash cone was observed. It amounted to 4 10 Δ = ±°.…”

“…The photometric and spectrophotometric characteristics of surfaces of natural and artificial bodies were determined by the author in 1985-1995 in experiments on physical modeling of the optical properties of surfaces of astronomical objects [9,10]. The use of the model data on the scattering phase functions and albedos as kernels in Eq.…”

Physical Simulation of Space Objects’ Spectral Characteristics for Solving the Reverse Problem of their Photometry

“…In detail the issues of solving the celestial body photometry direct problem with the use of their photometric properties simulation results were tackled upon by the author in quite a number of papers [11][12][13]. These papers also provide scattering indicatrices for different natural and technogenic object surfaces.…”