Hello, I have a question or two about gravitational waves. My current job is basically to measure atomic strains using x-ray diffraction. I have managed to reduce the error in measurement low enough to reveal an annual sine wave in my data for a sample which should not contain any strain. I first ruled out temperature as a cause, then noticed the oscillation is in good agreement with Earths distance from the sun. Further analysis has shown that the more minor oscillations trend very well with the azimuth and elevation of the moon at the time for a short enough period that the sun distance has not moved much. The combination of gravitational effects from the sun and moon appear to be influencing the measured strain on the atomic scale. Searching on Google regarding gravity and strain has kept pointing me to gravitational waves. The annual oscillation is on the order of 10^-5, from what I have found online gravitational waves should be many orders of magnitude weaker than this. However this seems too high to be a direct result of gravity, or am I wrong? I would also like to use the sun/moon position at the time of measurement to predict my result. However I'm not sure how to superimpose the two effects, especially considering gravitational waves!