Cal Sky reports the possibility of at least 8 pieces of USA 193 reentering over N Utah between now and Sunday. All are daytime or very low in the sky at night so they'll probably fall unseen. Still, FAA has issued this notice to airmen: 8/5536 - SPECIAL NOTICE .. THIS NOTAM REPLACES FDC 8/5501 DUE TO ADDITION OF CONTACT NUMBER. EFFECTIVE IMMEDIATELY UNTIL 0803092300 UTC. AIRCRAFT ARE ADVISED THAT A POTENTIAL HAZARD MAY OCCUR DUE TO REENTRY OF SATELLITE USA-193 DEBRIS INTO THE EARTHS ATMOSPHERE. FURTHER NOTAMS WILL BE ISSUED IF MORE INFORMATION BECOMES AVAILABLE. IN THE INTEREST OF FLIGHT SAFETY, IT IS CRITICAL THAT ALL PILOTS/FLIGHT CREW MEMBERS REPORT ANY OBSERVED FALLING SPACE DEBRIS TO THE APPROPRIATE ATC FACILITY TO INCLUDE POSITION, ALTITUDE, TIME, AND DIRECTION OF DEBRIS OBSERVED. FAA HEADQUARTERS, AIR TRAFFIC SYSTEMS OPERATIONS SECURITY, 202-493-5107, IS THE FAA COORDINATION FACILITY. WIE UNTIL UFN Plus Space.Com is reporting that (and how is this for irony?) the launch of 193's replacement has been put back a couple of weeks as "... a precautionary measure to avoid possible debris from the satellite that was intercepted on Feb. 20." patrick