CAL/FOS027

FIRMWARE TARGET ACQUISITION


A.L. KINNEY and R.G. 111ER

June, 1986


ABSTRACT


The firmware target acquisition (TA) mapu out a portion of the 4.3 x
4.3 aperture, filters the data, flnds a peak witbin a given brightness
window, and loca.tes the center in X and Y of the peak. The data
acquisition, filtering, a.nd finding of peaks ii described in
detail. Firmware acquisition haa been deuigned to be flexible, with
both user determined parameters and internai pa.rameters. The user
determined pa.rameters are in Table 1 a.nd 2; the interne.l
parameters, which cen be changed but arc not in general meant to be
changed, a.re in Table 3. Defaults for these para.meterm are
given. The serial engineering data returned by the firmware ca.n be
Seen in Table 4.


One very efflcient way to use the firmwa.re target acquisition ii to
flrstperform a coarse grid in Y a.nd locate the ta.rget, then perform
a flne grid in the area a.round the te.rget. Thia mode of operation im
.ketched out at the end md parameter vuiues arc suggested.