Results
The diagram indicates a main radiation exposure of 20mrad/d = 1.7 Gy/a. JPL reported that MARIE-measured radiation levels were two to three times greater than at the International Space Station (which is 100-200mSv/a). Levels at the Martian surface might be closer to the level at the ISS due to atmospheric shielding -- ignoring the effect of thermal neutrons induced by GCR. Average in-orbit doses were about 400-500mSv/a. However occasional solar proton events (SPEs) produce a hundred and more times higher doses, see diagram above. SPEs were observed by MARIE that were not observed by sensors near Earth, confirming that SPEs are directional.
Read more about this topic: Mars Radiation Environment Experiment
Famous quotes containing the word results:
“Social improvement is attained more readily by a concern with the quality of results than with the purity of motives.”
—Eric Hoffer (1902–1983)
“There is ... in every child a painstaking teacher, so skilful that he obtains identical results in all children in all parts of the world. The only language men ever speak perfectly is the one they learn in babyhood, when no one can teach them anything!”
—Maria Montessori (1870–1952)
““The ideal reasoner,” he remarked, “would, when he had once been shown a single fact in all its bearings, deduce from it not only all the chain of events which led up to it but also all the results which would follow from it.””
—Sir Arthur Conan Doyle (1859–1930)