Figs. 3–9 show the average RTI value with error bars at each test condition and
the average RTI value across all the test conditions of test sample A–G. The error
bars correspond to the highest and the lowest RTI values measured under each test
condition. The figures indicate that the average of the RTI values of each detector
sample across all the test conditions seemed to be an acceptable representation of the
detector sample’s RTI value. The normalized standard deviations of all the test
samples, except detector samples C and D, were not greater than 8%. The RTI
values of detectors C and D under the higher temperature with high velocities (i.e.,
conditions 7 and 8) were considerably higher than their corresponding average RTI