NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Eye problems and IE, IC
From: Bill B
Date: 2006 Jul 13, 17:53 -0500
From: Bill B
Date: 2006 Jul 13, 17:53 -0500
First of several tests run today. I believe we can eliminate frame/mirror flex as a problem in the vertical plane. The next post will contain vertical vs horizontal test with both eyes, on and off the arc, and should help determine if the horizontal readings differ due to frame/mirror flex in the horizontal position, and/or my eye(s) are at fault. I was surprised at the outcome of the upright vs inverted tests. When two sets of experimental data agree *exactly*, I look for a problem. I rewound the tape, wrote down the results again, and compared. It is what it is. I was disappointed with the spread of the horizontal shots, especially compared to the last round with SD's around 0.1'. I do not know what was off today. Order of observation was vertical upright, vertical inverted, horizontal handle up, vertical upright, vertical inverted, horizontal handle down.... Bill RIGIDITY TEST Upright vs. Inverted Astra IIB, Star Scope 13 July, 2006 15:06 to 15:40 EDT (breaks for cloud cover) Hc 66d to 61d Vertical Vertical Horizontal Upright Inverted 32.0 31.8 31.7 HU 31.8 32.0 31.8 HD 32.0 31.9 31.3 HU 32.0 31.9 31.6 HD 31.9 32.0 31.4 HU 32.1 32.0 31.4 HD 32.0 32.1 31.7 HU 31.9 32.0 31.8 HD Key: VU (vertical upright) VI (vertical inverted) HU (horizontal handle up) HD (horizontal handle down) Mean Standard Deviation VU 31.96' 0.09' VI 31.96' 0.09' HU 31.53' 0.21' HD 31.65' 0.19' HU+HD 31.59' 0.20' VU vs VI = | 0.00' | HU vs HD = | 0.18' | HU+HD vs VU or VI = | 0.37' | --~--~---------~--~----~------------~-------~--~----~ To post to this group, send email to NavList@fer3.com To , send email to NavList-@fer3.com -~----------~----~----~----~------~----~------~--~---