Dose-depth and SEU monitors for the STRV-1c satellite

Small, low power instruments have been developed to monitor total-dose and single event upsets (SEUs) in spaceborne electronics. These instruments hav e been designed to act as continuous monitors on the Science and Technology Research Vehicle (STRV) satellite. They will also act as monitors for othe r spacecraft in orbits where total dose, single event upsets (SEUs) and oth er single event effects (SEEs) are considered a significant hazard to on-bo ard electronics. Flight Models of each instrument have been designed and bu ilt to interface with the satellite on-board computer. The instruments have been characterized over the total dose range of 100 rads to 100 krads and the proton energy range 10 MeV to 500 MeV. The proton SEU cross section of 2 x 10(-11) cm(2)/bit is orders of magnitude more sensitive to protons than current flight electronics components. These instruments will be flown on the STRV-1c satellite in a Geosynchronous Transfer Orbit (GTO).