NavList:

   

Reply

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
--~--~---------~--~----~------------~-------~--~----~
Navigation List archive: www.fer3.com/arc
To post, email NavList@fer3.com
To , email NavList-@fer3.com
-~----------~----~----~----~------~----~------~--~---

   

Reply