They are provided with sufficient accuracy for the purpose for which they were designed — that of helping to predict the weather. (realclimate.org)
A blood test for CA - 125, a protein that is elevated in some women with ovarian cancer, is frequently used to monitor tumor recurrence, but the test lacks sufficient accuracy for screening purposes. (scientificamerican.com)
Ideally we should measure this energy imbalance directly but I seem to recall reading a James Hansen paper where he quantifies the net flow and explains why we can not measure the difference between inflow and outflow to sufficient accuracy using satellites. (realclimate.org)