Router Solicitation Resale Service Russian Segment Radio Science Regenerator Section Reconciliation Sublayer Recommended Standard Reed Solomon Republika Srpska Radiated Susceptibility Remote Sensing renal stone real soon resale services Radar Station Radiation Status record separator redundant set Reentry Systems Regulatory Support Relative Strength Relief Society remote site Requirements Specification Robotic Servicer Royal Society Radar Set radiation source Radiation Susceptibility Radio Satellite