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An index error correction table for each degree of altitude might be
an acceptable alternative to a baseline correction.

On Jun 13, 8:48�am, Greg Rudzinski  wrote:
> Trial of mirrored Trombone Kamal performed from shore �6/11/09
> 34�10'N 119�14'W �H.E.20ft.
>
> Tangents calculated with Canon scientific calculator F-710.
> Sight reduction calculated with Palm Tungsten T3 using John Manson
> software.
>
> UT 6/12/09 � � Tangent � Sun Limb � (hs) � � Intercept(baseline
> uncorrected)
> 02:32:08 � � � 3"/26.2" �U.L. � � � 6�31.9' �6.7'T
> 02:33:57 � � � 3"/27.6" �U.L. � � � 6�12.2' �7.2'T
> 02:35:34 � � � 2"/21.5" �L.L. � � � 5�18.9' �1.6'T
> 02:36:36 � � � 2"/22.0" �L.L. � � � 5�11.6' �6.7'T
> 02:37:40 � � � 2"/23.1" �L.L. � � � 4�56.9' �3.7'T
> 02:39:07 � � � 2"/24.3" �L.L. � � � 4�42.3' �4.7'T
> 02:40:14 � � � 2"/25.4" �L.L. � � � 4�30.1' �5.0'T
> 02:40:52 � � � 2"/26.1" �L.L. � � � 4�22.9' �4.7'T
> 02:41:40 � � � 2"/26.7" �L.L. � � � 4�17.0' �7.6'T
> 02:42:49 � � � 2"/28.1" �L.L. � � � 4�04.3' �7.3'T
>
> Mean Intercept 5.5'T
> Standard Deviation 1.9'
> Max. Spread 6.0'
>
> Intercepts using a +0.4" baseline correction:
>
> 0.8'T
> 1.8'T
> 3.4'A
> 1.1'T
> 1.5'A
> 0.4'T
> 0.8'T
> 0.6'T
> 3.6'T
> 3.8'T
>
> Mean 0.8'T
> Standard Deviation 2.1'
> Max. Spread 7.2'
>
> Improvements over first prototype trial:
>
> - Mirror reduces standard deviation from 6.1' to 2.1'
> - Baseline calibration decreases average intercept from 5.65' to 0.8'
> - Utilization of an altitude zone between 4 degrees and 7 degrees
> � improves geometry with acceptable low altitude refraction.
> - Tangents calculated by calculator vs. slide rule.
>
> On Jun 7, 10:41�am, Greg Rudzinski  wrote:
>
> > The Trombone Kamal prototype has gotten an up-grade of a mirror. The 
mirror is glued over the horizon reference line using silicone adhesive. If 
the navigator places the reflection of his eye in the mirror then 
perpendicularty and consistency is preserved. The next thing to do is for the 
navigator to calibrate his baseline to include the distance from the front of 
the eye to the center of the eye. For me this distance is 0.4 inches. Frank 
correctly spotted a discrepancy through data analysis and suggested 
calibration. George correctly identified the cause of a baseline short fall 
by analyzing the physiology of eye movement and the associated light paths. 
Excellent observations by both Frank and George.
>
> > �IMG_1293.JPG
> > 101KViewDownload
>
> > �IMG_1287.JPG
> > 74KViewDownload
>
> > �IMG_1286.JPG
> > 101KViewDownload
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