Reproducing the Velador Experiment
Dr. Osadchey's 6-11-07 Trial
In an effort to evaluate my results for Trial 8, which yielded a null result, Dr. Osadchey conducted his own trial, which is detailed on his web site. I have subjected his data to a correction for thermal drift similar to what I have been applying to my own data.
| Start | 8:15:00 | ||||
| End | 8:30:00 | ||||
| Mean Interval | 24.32432 | ||||
| Resolution | 4.0 | MegaPixel | |||
| Sidereal Time | 1:45:11 | ||||
| Center Position | |||||
| Photo | Angle | X | Xadj | Y | Yadj |
| 3 | 90 | 922 | -0.5462 | 879 | 0.142066 |
| 4 | 120 | 920 | -1.67843 | 879 | 0.178323 |
| 5 | 150 | 921 | -1.10041 | 882 | 1.926896 |
| 6 | 180 | 919 | -2.23267 | 879 | 0.256996 |
| 7 | 210 | 919 | -2.22476 | 875 | -1.98094 |
| 8 | 240 | 920 | -1.64678 | 874 | -2.50656 |
| 9 | 270 | 919 | -2.20898 | 872 | -3.60022 |
| 10 | 300 | 921 | -1.06093 | 874 | -2.41147 |
| 11 | 330 | 922 | -0.48298 | 872 | -3.50102 |
| 12 | 360 | 922 | -0.47513 | 871 | -4.01843 |
| 13 | 390 | 923 | 0.102793 | 873 | -2.82353 |
| 14 | 420 | 924 | 0.680708 | 875 | -1.62657 |
| 15 | 450 | 919 | -2.16192 | 877 | -0.42757 |
| 17 | 480 | 922 | -0.43605 | 879 | 0.773495 |
| 18 | 510 | 920 | -1.56845 | 879 | 0.836433 |
| 19 | 540 | 921 | -0.99059 | 880 | 1.47151 |
| 20 | 570 | 916 | -3.83327 | 873 | -2.45206 |
| 21 | 600 | 919 | -2.11526 | 873 | -2.38297 |
| 22 | 630 | 919 | -2.10752 | 871 | -3.452 |
| 23 | 660 | 921 | -0.95962 | 869 | -4.51897 |
| 24 | 690 | 920 | -1.522 | 870 | -3.87363 |
| 25 | 720 | 924 | 0.766055 | 871 | -3.22624 |
| 26 | 750 | 922 | -0.36643 | 872 | -2.5768 |
| 27 | 780 | 923 | 0.211337 | 874 | -1.35521 |
| 28 | 810 | 921 | -0.92117 | 877 | 0.438511 |
| 30 | 840 | 922 | -0.33578 | 876 | -0.04606 |
| 31 | 870 | 920 | -1.46832 | 878 | 1.181678 |
| 32 | 900 | 920 | -1.4607 | 878 | 1.271296 |
| 33 | 930 | 920 | -1.45309 | 876 | 0.22279 |
| 34 | 960 | 918 | -2.58567 | 871 | -2.53393 |
| 35 | 990 | 918 | -2.57808 | 868 | -4.14841 |
| 36 | 1020 | 917 | -3.14059 | 867 | -4.62067 |
| 37 | 1050 | 919 | -1.99285 | 866 | -5.09088 |
| 38 | 1080 | 922 | -0.27503 | 867 | -4.41886 |
| 39 | 1110 | 923 | 0.302597 | 870 | -2.60462 |
| 40 | 1140 | 926 | 2.020391 | 871 | -1.92849 |
| 41 | 1170 | 925 | 1.457823 | 874 | -0.11014 |
| Fit | |||||
| X | Y | ||||
| 90 | 922 | 879 | |||
| 450 | 919 | 877 | |||
| 810 | 921 | 877 | |||
| 1170 | 925 | 874 | |||
| Peak to Trough | |||||
| X | Xadj | Y | Yadj | ||
| Turn 1 | 5 | 2.913376 | 11 | 5.945331 | |
| Turn 2 | 8 | 4.599325 | 11 | 5.990482 | |
| Turn 3 | 9 | 5.160981 | 12 | 6.362179 | |
| Average | 7.333333 | 4.224561 | 11.33333 | 6.09933 | |
| Stdev | 2.081666 | 1.16973 | 0.57735 | 0.22875 | |
| Note: Adjustment includes correction for 1.3 Megapixel camera | |||||
Dr. Osadchey is measuring his images manually, so there is no data for standard deviation of the image size. He conducted his experiment using a higher resolution camera than I am using for my current trials. To correct for this, I also included a constant scale factor in my adjustment for both axes. However, even with this correction, the adjusted peak to trough values are double to triple what I am observing to the south. The trial 8 is separated by approximately 3 hours sidereal time.
This result is consistent with the hypothesis of an absolute vector reference (recall that Lance and I are separated by 12 degrees of latitude, which could allow considerable differences in measured values), but places further constraints on the orientation of such a vector. I will not consider the notion of yearly variation in the reference vector given constant sidereal time - that is simply beyond the scope of my experiment, and I couldn't verify it using my current experimental plan even if I wanted to. But I can begin addressing variation over sidereal time, and will investigate changes with elevation (equivalent to changes in latitude, according to my favorite working hypothesis) in a later phase of my experiment.