storage random exact same location lights in sky

From 22:30 until 23:15 we were monitoring the sky Western sky from Campton Hills, about 220 degrees, and 70 degrees in the sky.  Over a period of 45 minutes a single light flash in the exact same location every few minutes, random.  At first we thought it was a plane, but no noise, it continued until an airplane lower passed somewhat below it in the sky, then it stopped.  There also was shooting starts in the same area during that time. It was a bright white light, appearing as a large star, but clearly was closer.  We checked and no satellites were in that area and no stars or planets were in the area.