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710 NOUS71 KNCF 031721 ADANCF . SUBJECT: AWIPS SATELLITE BROADCAST NETWORK CUTOVER FROM SN-IV TO GE-4 SPACECRAFT GE AMERICOM IS PREPARING TO TRANSFER ALL C-BAND TRANSMISSIONS FROM THE OLD SPACENET-IV SATELLITE TO THE NEW GE-4 SATELLITE. APPROXIMATELY TWO WEEKS AGO, GEA MOVED ALL OF THEIR KU-BAND SERVICE TO THE NEW SATELLITE WITHOUT ANY PROBLEMS, AND THE NEW SATELLITE CONTINUES TO BE STABLE. THE AWIPS SBN IS ONLY ONE OF MANY USERS ON THE C-BAND TRANSPONDERS. . GEA WILL PERFORM THE CUTOVER OF THE TRANSPONDER FOR ALL FOUR AWIPS SBN CHANNELS ON 04 JANUARY 2000 SOMETIME BETWEEN 0500Z AND 0900Z. THE ACTUAL TRANSPONDER CUTOVER WILL AFFECT THE AWIPS BROADCAST FOR 30 TO 120 SECONDS. DURING THIS PERIOD, SOME GARBLING OF AWIPS DATA COULD OCCUR. GOES-E, GOES-W, AND NON-GOES PRODUCT CHANNELS DATA DROPOUTS MAY BE SEEN ON PRODUCTS TRANSMITTED DURING THE CUTOVER. ANY NWSTG PRODUCTS THAT ARE GARBLED DURING THE CUTOVER WILL BE AUTOMATICALLY RETRANSMITTED, SO NO DATA LOSS SHOULD OCCUR. . IF GEA ENCOUNTERS A PROBLEM DURING THE CUTOVER, THEY WILL REVERT BACK TO SN-IV UNTIL THE PROBLEM IS CLEARED. DYNCORP (FORMERLY GTE) ENGINEERS WILL BE AT THE AWIPS MASTER GROUND STATION DURING THE PROCESS. BOTH DYNCORP AND NCF ENGINEERS WILL BE MONITORING UPLINK AND DOWNLINK OPERATIONS THROUGHOUT THE CUTOVER. THE NCF WILL TRANSMIT AN ADMIN MESSAGE VIA THE WAN AND SBN IF ANY PROBLEMS OCCUR. A FINAL MESSAGE WILL BE SENT WHEN THE CUTOVER HAS BEEN SUCCESSFULLY COMPLETED. ---------- End Forwarded Message ----------
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