In late May of this year, Yosemite Space presented analyzed radiation data from ground radiation testing of three models of Gumstix: Earth, SandStorm and Water at the Single Event Effects Symposium. Expected rates for single event effects in low earth orbit were presented. Yosemite Space also showed that almost all Gumstix showed stuck bits in RAM when exposed to 64MeV protons. Further testing indicated that this was likely due to microdosing. Experience and knowledge from these tests are influencing the design of the Resilient Affordable Cubesat Processor.
Data from ground testing will be compared to space data once the Yosemite Space Gumstix payload is launched to the ISS and placed in the NanoRacks External Platform. This s expected to occur in 2016.
Slides from this presentation are here: SEE_Gumstix_YS