Redundant COTS-based GPS receiver unit tailored for positioning and timing applications for LEO missions featuring: ∙ Configurable redundancy of dual receiver assembly ∙ Improved solution availability by dual independent passive receive antenna system with passive combination of RF signals ∙ Equipped with inrush current limitation and voltage/current monitoring ∙ FDIR capability for timely reaction to system failures ∙ Navigation firmware and tracking channels optimized to LEO missions ∙ Receiver warm startup mode to enable rapid time to first positioning fix ARGO-L1 consists of a receiver unit box and accompanying LNAs and antennas. The box can be supplied in two possible mounting configurations.