Perturbing effect of solar radiation on the Spektr-RG spacecraft in operational orbit

Results and analysis are presented for a numerical simulation of solar radiation forces acting on the Spektr-RG spacecraft in operational orbit. The possibility is investigated of compensating the radiation pressure-induced perturbing torque without adding new units and assemblies into the spacecraft configuration. A rationale is given for ways of implementing the compensation techniques that enable 65% compensation of sufficiently large perturbing torques, thus considerably reducing (by 5–6 kg) the propellant consumption in the control system engines and increasing the lifetime of the spacecraft.