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889 NOUS72 KNCF 041713 ADMNCF SUBJ: AWIPS SBN INTERRUPTIONS DUE TO SOLAR RF INTERFERENCE . BEGINNING FEBRUARY 22 AND CONTINUING THROUGH MARCH 15, THE SUN WILL ALIGN WITH THE GE-4 SPACECRAFT IN SUCH A WAY THAT SOLAR RF ENERGY WILL DEGRADE OR INTERRUPT RECEIPT OF AWIPS SBN TRANSMISSION OF THE NWSTG, GOES-EAST, GOES-WEST, AND NOAAPORT_OPT CHANNELS FOR MANY SITES. THIS INTERFERENCE WILL LAST ABOUT 20 MINUTES AND WILL OCCUR BETWEEN 1800Z AND 2000Z OVER A PERIOD OF 10 DAYS. THE PLACEMENT OF THE 10-DAY PERIOD WITHIN THE FEBRUARY 22 TO MARCH 15 TIMEFRAME WILL DEPEND ON THE LATTITUDE OF THE RECEIVING SITE. THE 10-DAY PERIOD WILL BEGIN SOONER FOR SOUTHERN SITES, LATER FOR NORTHERN SITES. THE AWIPS SBN AUTOMATIC RETRANSMISSION FEATURE WILL ENSURE THAT AWIPS SITES DO NOT EXPERIENCE DATA LOSS FOR THE NWSTG AND NOAAPORT CHANNELS. THERE IS NO RETRANSMISSION CAPABILITY FOR THE GOES-E AND GOES-W CHANNELS. . Ncf/kbb ---------- End Forwarded Message ----------
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