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12 AUTOSTAR CCD PHOTOMETRY

8. Unless the sky is exceptionally steady, leave the image quality

(Min Quality %) at 30 and evaluation frames (Evaluation Count)

at 5. These default values seem to work well. Check the Combine

box. (Fig. 2-11.)

Figure 2-11. Quality and Evaluation Count Window.

Make sure the images are saved as FITS files and Normal

Operation is selected (see Fig. 2-12). Click the Save Procedure

button.

Figure 2-12. Save Procedure Window.

9. Now we will set up a Tracking Reference Star that will be

used to align the images in the stack of images that are combined.

While viewing the real-time image (with the DSI1 folder tab

selected and Live box checked; see Figure 2-13), draw a small box

around an isolated star to be used as a Reference Guide Star (see

Figure 2-14).

Figure 2-13.

DSI1 Folder Tab.

Figure 2-14.

Tracking Star Selection Box.

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Meade Image Processing Spécifications Page 22