Astronomy and Astrophysics – Astronomy
Scientific paper
May 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985rpspr...4...58p&link_type=abstract
In its USSR Rept.: Space (JPRS-USP-85-004) p 58-59 (SEE N85-26772 16-12) Transl. into ENGLISH from Vestn. Leningr. Univ.: Mat
Astronomy and Astrophysics
Astronomy
Gravitational Fields, Photoabsorption, Reflectance, Solar Gravitation, Solar Orbits, Solar Sails, Space Flight, Spacecraft Propulsion
Scientific paper
Motion of reflecting bodies in a central photogravitational field is the Tsander motion. Restricting the examination to elliptical Tsander trajectories corresponding to a perdominance of attraction over repulsion and with Tsander unperturbed motion serving as the basis with a constant reduction of solar mass, it is possible to examine perturbed Tsander motion in the presence of some constantly operative perturbing acceleration and take the variability of solar field reduction into account. The problem of gradual deterioration of a solar sail was studied. A gradual worsening of the optical characteristics of the sail during a flight occurs under the influence of such space factors as a deep vacuum, micrometeorites, corpuscular streams, gamma radiation and high energies. A worsening of the optical characteristics is accompanied by an increase in transparency of the sail film, erosion, turbidity and darkening of material as a result of exposure to high temperatures. Changes in the physical parameters of a solar sail exert a considerable influence on the nature of orbital Tsander motion. Allowance for deterioration of the sail is important in predicting the motion of a space vehicle with a solar sail in a Tsander elliptical orbit.
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