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000
NOUS71 KNES 062154
ADANES
SUBJECT: SARSAT OUTAGE/ANOMALY: UPDATE#2 (FINAL UPDATE): ALASKA 4
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*UPDATE #2 : *THE LOCAL CONTRACTOR DETERMINED THE CAUSE OF THE PREVIOUS
INTERMITTENT AZIMUTH ANTENNA PROBLEMS WERE DUE TO EXTREMELY LOW
TEMPERATURE
WEATHER CONDITIONS. THE VENDOR IS ATTEMPTING TO SECURE ADDITIONAL
HEATERS
FOR THE AREA. ALASKA 4 RETURNED TO NORMAL OPERATIONS ON DECEMBER
5, 2021
0703Z.


*UPDATE #1: * THE LOCAL CONTRACTOR IS SCHEDULED TO BE ON SITE MONDAY,
DECEMBER 6 TO INVESTIGATE THIS INTERMITTENT ISSUE.


*TOPIC:*  SARSAT ALASKA 4 LOW EARTH ORBIT (LEO) GROUND STATION OFFLINE


*DATE/TIME ISSUED: * DECEMBER 6, 2021 2145Z


*PRODUCT(S) OR DATA IMPACTED:* SARSAT ALERT DATA


*DATE/TIME OF INITIAL IMPACT:*     DECEMBER 3, 2021 0727Z


*DATE/TIME OF EXPECTED END:*  DECEMBER 5, 2021 0703Z


*LENGTH OF OUTAGE: * 1 DAY, 23 HOURS 36 MINUTES


*DETAILS/SPECIFICS OF CHANGE: * THE ALASKA 4 (AK4) LEO GROUND STATION
LOCATED IN FAIRBANKS, AK  HAS MISSED TWO CONSECUTIVE PASSES. THE
MAINTENANCE VENDOR HAS REPORTED AN INTERMITTENT AZIMUTH ANTENNA ISSUE.


*IMPACT: *MINOR-DUAL SATELLITE TRACKING CAPABILITY LOST. DISTRESS ALERT
DETECTION/REPORTING MAY BE DELAYED.


*CONTACT INFORMATION FOR FURTHER INFORMATION: *USMCC OPERATIONS
USMCC@NOAA.GOV AT
301-817-4576


*WEB SITE(S) FOR APPLICABLE INFORMATION:* N/A

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UPDATE #2 :
THE=C2=A0LOCAL=
=20
CONTRACTOR DETERMINED THE CAUSE OF THE PREVIOUS INTERMITTENT=20
AZIMUTH=C2=A0ANTENNA PROBLEMS WERE DUE TO EXTREMELY LOW TEMPERATURE
WEATHER=
=20
CONDITIONS. THE VENDOR IS ATTEMPTING TO SECURE ADDITIONAL=C2=A0HEATERS
FOR=
=20
THE AREA. ALASKA 4 RETURNED TO NORMAL OPERATIONS ON=C2=A0DECEMBER 5, 2021 0703Z.

UPDATE
#1:=C2=A0=C2=A0THE LO=
CAL CONTRACTOR IS SCHEDULED TO BE ON=C2=A0SITE MONDAY, DECEMBER 6
TO INVEST=
IGATE THIS INTERMITTENT ISSUE.
<=
/FONT>

TOPIC:=C2=A0=C2=A0SARSAT=C2=A0ALASKA
4 LOW EA=
RTH ORBIT (LEO) GROUND STATION OFFLINE

DATE/TIME
ISSUED:=C2=A0=C2=A0DECEMBER 6,
2021 2145Z

PRODU=
CT(S) OR DATA IMPACTED:=C2=A0=C2=A0SARSAT=C2=A0ALERT
DATA

=
DATE/TIME
OF INI=
TIAL IMPACT:=C2=A0 =C2=A0=C2=A0 =C2=A0DECEMBER 3, 2021 0727Z
=

DATE/TIME OF EXPECTED
END:=C2=A0=
=C2=A0DECEMBER 5,
2021 =
0703Z
=

=
LENGTH OF=C2=A0OUTAGE:=C2=A0=C2=A01 DAY, 23 HOURS 36
MINUTES<=
/P>

DETAILS/SP=
ECIFICS OF CHANGE:=C2=A0=C2=A0THE ALASKA 4=C2=A0(AK4) LEO GROUND STATION
LOCATED I=
N FAIRBANKS, AK=C2=A0=
=C2=A0HAS MISSED TWO CONSECUTIVE PASSES. THE MAINTENANCE VENDOR
HAS REPORTE=
D AN INTERMITTENT AZIMUTH ANTENNA ISSUE.
<=
B>
IMPACT:=C2=A0MINOR-DUAL
SATELLITE=
 TRACKING CAPABILITY LOST. DISTRESS ALERT DETECTION/REPORTING MAY
 BE DELAYE=
D.

CONTACT=
 INFORMATION FOR FURTHER INFORMATION:=C2=A0USMCC OPERATIONS=C2=A0US=
MCC@NOAA.GOV=C2=A0AT=C2=A0
301-817-4576

WEB SITE(S)
FOR APPLICAB=
LE INFORMATION:=C2=A0N/A


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