All good here in MD..........SAT down would be the last thing to check and you would know it because neighbors would be in the street looking at the sky and praying to the TV gods for salvation. Since all you boxes went down there has to be a common intermittent problem. Look for a loose cable from the dish to the multiswitch. or if a SWM check the power inserter and splitter. Perhaps the LNB is going out. Perhaps the dish & mast have worked loose and will move in wind. Try to duplicate the defect by shaking cables.
Thanks guys. It resolved itself within 10 minutes - but there was definitely nothing blocking the dish, which had me wondering what was up. No cause for alarm, go about your business.