Table 32.1 summarizes the accuracies you can expect from your data when you have recalibrated it with the latest calfos software and the best reference files (as recommended by StarView-see Chapter 1 in Volume 1), assuming your target acquisition was successful and appropriate for your science aperture, and, for photometry, assuming the 1.0 or 4.3 aperture was used. Note that a typical science observation may have systemic errors as much as two or three times those listed in Table 32.1, if the acquisition miscentered the target or the observations were taken during a period when the Y-bases were in error. In some cases improvements can be made further by using the calibration information and post observation refinement tasks described in this Data Handbook.
)
to H
.