To disclose the value of secular aberration (and to disclose the motion of the solar system against aether) may be possible theoretically. A star light is coming from just above and waves reach ground just horizontally. On the ground, there are four instruments. Waves of this star light are observed by these. These are at the same point, so the same waves are observed. Now, four instruments each leaves (moves) to north, south, east and west (rotation and revolution of the earth are neglected. Namely, it's supposed that facing direction of the ground to the celestial sphere is fixed). At the starting point, there is a monitor. To this monitor, informations of waves are sent from four instruments (four distances between monitor and four instruments are equal always). Information of four waves are overlapped by this monitor. It's just like one wave from start to finish (any change is not seen). From above, the true coming direction of this star light (and true position of this star on the celestial sphere) may be found. And by difference between seeming direction, the value of secular aberration may be found also.
P.S. Sorry, i can't receive E-mail. i don't have PC.
