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Re: Target Tracking Error (Java Related?)

Posted by karenacollins on Aug 18, 2023; 10:24am
URL: http://astroimagej.170.s1.nabble.com/Target-Tracking-Error-Java-Related-tp2275p2278.html

Hi Erin,

The best approach to avoid single step (which is broken in your version right now anyway) is to use an aperture large enough to capture the full movement of the asteroid from frame to frame. Then the target aperture should inch along with the asteroid and the comps should stay put (as long as they are isolated from other stars in the aperture size selected).

Another approach is to set the Base aperture large enough to capture the movement, but use the 4th or 5th mode (the variable aperture modes). The large Base aperture size will capture the movement, but will then shrink down to a variable aperture size before taking the photometric measurement.

The complication with the automatic process is that the asteroid will likely eventually pass through a field star. If the star is brighter, the centroid function may get stuck on the brighter star. If that is the case, we'll have to get you the single step mode fix first.

If you want me to try an example you have with the candidate build that we currently have, please provide the calibrated image sequence somewhere that I can download. If you'd prefer to send the link directly, use karenacollins (atatat) outlook (dotdotdot) com.

Karen