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ACP-282 - Calibrated guider images cause "impossibly clean image" error
Estimated: 2 Hours 0 Minutes   Logged: 1 Hours 30 Minutes   Time Left: 0 Hours 30 Minutes
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Type: Limitation Limitation
Priority: Medium Medium
Severity: Minor Minor
Status: Closed Closed
Resolution: Complete
Resources: Bob Denny
Reported By: Bob Denny
Component: AcquireSupport library
Fixed In Version: 5.1 HotFix 10
Versions Affected: 5.1 HotFix 10
Start Date: 11/4/2009
Percent Complete:
Created:  11/4/2009 5:58:48 PM
Revised:
 11/5/2009 3:08:43 PM
Closed:  11/4/2009 6:50:03 PM
Resolved:  11/4/2009 6:41:02 PM

Under as yet undetermined conditions, full-calibration on guider images cause ACP's guiding exposure calculations to fail with the "impossibly clean" error. I have tested calibrated guiding on an ST-237 and found that it does nicely clean up hot pixels and removes the common high pedestal on the ST-237. Guiding works better. The problem comes when calibration removes the camera noise from the guider image, preventing calculation of SNR.

Attachments

Download Autoguider Image.zip 11/4/2009 47.69 KB Delete