actuated fold mirrors ADC ( see analog-to-digital converter ) AFMs ( see actuated fold mirrors ) [1] [2] analog-to-digital converter aperture photometry apertures artifacts bright object diffraction spikes large angle scattering [1] [2] astrometry image scale AB magnitude aberration correction ACOADD ( see STSDAS) actuated fold mirrors [1] [2] ADT-GAIN Ammonia heat pipe analog-to-digital converter [1] [2] AP-17 [1] [2] apertures position ...