We already have shown that the calculators produce accurate predictions.
Tom, the reason you don't believe horoscopes and death clocks is because their predictions turn out to be wrong. If we had only examples of them being right and no examples of them being wrong, the logical conclusion would be that they are accurate.
Apply the same logic to the sun data.
You see, if your claim (that the calculators are wrong) is the correct one, then your proof would be the easiest to produce. We can, and have, given you several repeatable demonstrations that the predictions are correct, but these could conceivably be coincidences. For you, however, all you need to do is provide one repeatable demonstration that the predictions are ever wrong, and you will have proved your claim. Why can't you do this?