The sidereal diurnal variation (T=0.997d) for lOTeV cosmic ray has been detected with about signal-noise ratio 5.0, with amplitude 0.125 + 0.079% and phase 0.45(llh) by analyzing the data of cosmic ray flux after meteorological effect corrected.

• 通过对气象效应修正后的宇宙线流强数据进行周期分析，发现了10TeV宇宙线流强的恒星日(T== 0.；997日)变化，其信噪比为5