MONITORING OF SURFACE DATA

MONTHLY SUSPECT LIST


MONITORING CENTRE: MELBOURNE




MONITORING PROCEDURES
 :-  
PERIOD     : ONE CALENDAR MONTH
DATA MONITORED : : REPORTS FROM EACH UNIQUE IDENTIFIER FOR SYNOP
AREA
 : FULL GLOBAL
STANDARD OF COMPARISON :
 +6H FIRST GUESS FIELD FROM THE AUSTRALIAN GLOBAL ASSIMILATION PREDICTION (GASP) MODEL
OBSERVATION TIMES
 : 00, 06, 12, 18 UTC
ELEMENT MONITORED : MSLP - MEAN SEA LEVEL PRESSURE (hPa)
PARAMETERS MONITORED :-  
  NOBS : NUMBER OF OBSERVATIONS RECEIVED (WITH FIRST GUESS AVAILABLE) EXCLUDING DUPLICATES
  NGE : NUMBER OF OBSERVATIONS WITH GROSS ERROR
  PGE : PERCENTAGE OF OBSERVATIONS WITH GROSS ERRORS
  SD : STANDARD DEVIATION OF DIFFERENCE BETWEEN OBSERVATIONS AND BACKGROUND FIELD EXCLUDING OBSERVATIONS WITH GROSS ERRORS

 
  BIAS : MEAN OF DIFFERENCE BETWEEN OBSERVATIONS AND BACKGROUND FIELD EXCLUDING OBSERVATIONS WITH GROSS ERRORS
  RMS : ROOT MEAN SQUARE OF DIFFERENCE BETWEEN OBSERVATIONS AND BACKGROUND FIELD EXCLUDING OBSERVATIONS WITH GROSS ERRORS

 
GROSS ERROR LIMIT : 15.0 hPa
SELECTION CRITERIA

:

NOBS >= 20 AND ONE OR MORE OF THE FOLLOWING:
  1. |BIAS|   >= 4.0hPa
   2. SD       >= 6.0hPa
  3. PGE    >= 25%

MONITORING OF RADIOSONDE OBSERVATIONS


MONTHLY SUSPECT LIST


MONITORING CENTRE: MELBOURNE

MONITORING PROCEDURES
 :-  
PERIOD     : ONE CALENDAR MONTH
DATA MONITORED : REPORTS FROM EACH UNIQUE IDENTIFIER FOR RADIOSONDE TEMPS
AREA
 : FULL GLOBAL
STANDARD OF COMPARISON :
 +6H FIRST GUESS FIELD FROM THE AUSTRALIAN GLOBAL ASSIMILATION PREDICTION (GASP) MODEL
OBSERVATION TIMES
 : 00, 12 UTC
ELEMENT MONITORED : GEOP - GEOPOTENTIAL HEIGHT (metres)
LEVELS MONITORED :

LEV - STANDARD LEVELS FROM 1000 - 30 hPa
ONLY WORST LEVEL SHOWN WITH UNWEIGHTED RMS
PARAMETERS MONITORED :-  
  NOBS : NUMBER OF OBSERVATIONS RECEIVED (WITH FIRST GUESS AVAILABLE) INCLUDING GROSS ERRORS

 
  NGE : NUMBER OF OBSERVATIONS WITH GROSS ERROR
  PGE : PERCENTAGE OF OBSERVATIONS WITH GROSS ERRORS
  SD : STANDARD DEVIATION OF DIFFERENCE BETWEEN OBSERVATIONS AND BACKGROUND FIELD EXCLUDING OBSERVATIONS WITH GROSS ERRORS

 
  BIAS : MEAN OF DIFFERENCE BETWEEN OBSERVATIONS AND BACKGROUND FIELD EXCLUDING OBSERVATIONS WITH GROSS ERRORS
  RMS : ROOT MEAN SQUARE OF DIFFERENCE BETWEEN OBSERVATIONS AND BACKGROUND FIELD EXCLUDING OBSERVATIONS WITH GROSS ERRORS

 
  SUSPECT :

NUMBER OF LEVELS SATISFYING SELECTION CRITERIA
GROSS ERROR LIMIT : DEFINED IN TABLE BELOW
SELECTION CRITERIA

:

AT LEAST 3 LEVELS WITH AT LEAST 10 REPORTS
HAVING WEIGHTED RMS OF AT LEAST 100M AT EACH

GROSS ERROR LIMITS and RMS WEIGHTING VALUES
AS APPLIED TO RADIOSONDE OBSERVATIONS


The gross error limits for observation minus first guess geopotential height (interpolated to location of observation), plus RMS weighting values, as applied for geopotential (upper air) results are:

Level (hPa)
Geopotential Difference (m)
Weight

1000
100
3.70
925
100
3.55
850
100
3.40
700
100
2.90
500
150
2.20
400
175
1.90
300
200
1.60
250
225
1.50
200
250
1.37
150
275
1.19
100
300
1.00
70
375
0.87
50
400
0.80
30
450
0.64

MONITORING OF MARINE SURFACE OBSERVATIONS

SUSPECT LIST: SHIPS, FIXED BUOYS & PLATFORMS


MONITORING CENTRE: MELBOURNE


MONITORING PROCEDURES
 :-  
PERIOD     : ONE CALENDAR MONTH
DATA MONITORED : REPORTS FROM EACH UNIQUE IDENTIFIER FOR SHIP
STANDARD OF COMPARISON :
 +6H FIRST GUESS FIELD FROM THE AUSTRALIAN GLOBAL ASSIMILATION PREDICTION (GASP) MODEL
OBSERVATION TIMES
 : 00, 06, 12, 18 UTC
POSITION           LAT/LON
 : LATITUDE AND LONGITUDE FOR THE INITIAL REPORT IN THE PERIOD
ELEMENT MONITORED :-  
  DD : Wind direction (degrees) except light winds (<= 5m/s)
  FF : Wind speed (m/s)
  MSLP : Mean sea level pressure (hPa)
  SST : Sea surface temperature (C)
PARAMETERS MONITORED :-  
  NOBS : NUMBER OF OBSERVATIONS RECEIVED (WITH FIRST GUESS AVAILABLE) EXCLUDING DUPLICATES
  NGE : NUMBER OF OBSERVATIONS WITH GROSS ERROR
  PGE : PERCENTAGE OF OBSERVATIONS WITH GROSS ERRORS
  SD : STANDARD DEVIATION OF DIFFERENCE BETWEEN OBSERVATIONS AND BACKGROUND FIELD EXCLUDING OBSERVATIONS WITH GROSS ERRORS

 
  BIAS : MEAN OF DIFFERENCE BETWEEN OBSERVATIONS AND BACKGROUND FIELD EXCLUDING OBSERVATIONS WITH GROSS ERRORS
  RMS : ROOT MEAN SQUARE OF DIFFERENCE BETWEEN OBSERVATIONS AND BACKGROUND FIELD EXCLUDING OBSERVATIONS WITH GROSS ERRORS

 
GROSS ERROR LIMIT

:

15.0 hPa  (pressure)
25.0 m/s  (vector wind)
10.0 C     (sea surface temperature)
SELECTION CRITERIA : NOBS >= 20 AND ONE OR MORE OF THE FOLLOWING:
        wind direction
(> 5m/s)		 wind speed pressure sea surface
temperature
  1. |BIAS| >= 30 degrees 5 m/s 4 hPa 3 C
  2. SD >= 80 degrees
-
 6 hPa 5 C
 

3.

%GROSS
 


 >= 25 % 25 % 25 % 25 %

FOR DD: IF SD=999, CANNOT COMPUTE AVE WIND DIRECTION. THUS SD IS INDETERMINATE

FROM JANUARY 2005, SHIP & BUOY STATISTCAL REPORTS ON WIND DIRECTION REQUIRE ONLY OBSERVED VALUES > 5.0 m/s


MONITORING OF MARINE SURFACE OBSERVATIONS

MONTHLY SUSPECT LIST: DRIFTING BUOYS

 

MONITORING CENTRE: MELBOURNE

MONITORING PROCEDURES
 :-  
PERIOD     : ONE CALENDAR MONTH
DATA MONITORED : REPORTS FROM EACH UNIQUE IDENTIFIER FOR BUOY
STANDARD OF COMPARISON :
 +6H FIRST GUESS FIELD FROM THE AUSTRALIAN GLOBAL ASSIMILATION PREDICTION (GASP) MODEL
OBSERVATION TIMES
 : 00, 06, 12, 18 UTC
POSITION           LAT/LON
 : LATITUDE AND LONGITUDE FOR THE INITIAL REPORT IN THE PERIOD
ELEMENT MONITORED :-  
  DD : Wind direction (degrees) except light winds (<= 5m/s)
  FF : Wind speed (m/s)
  MSLP : Mean sea level pressure (hPa)
  SST : Sea surface temperature (C)
PARAMETERS MONITORED :-  
  NOBS : NUMBER OF OBSERVATIONS RECEIVED (WITH FIRST GUESS AVAILABLE) EXCLUDING DUPLICATES
  NGE : NUMBER OF OBSERVATIONS WITH GROSS ERROR
  PGE : PERCENTAGE OF OBSERVATIONS WITH GROSS ERRORS
  SD : STANDARD DEVIATION OF DIFFERENCE BETWEEN OBSERVATIONS AND BACKGROUND FIELD EXCLUDING OBSERVATIONS WITH GROSS ERRORS

 
  BIAS : MEAN OF DIFFERENCE BETWEEN OBSERVATIONS AND BACKGROUND FIELD EXCLUDING OBSERVATIONS WITH GROSS ERRORS
  RMS : ROOT MEAN SQUARE OF DIFFERENCE BETWEEN OBSERVATIONS AND BACKGROUND FIELD EXCLUDING OBSERVATIONS WITH GROSS ERRORS

 
GROSS ERROR LIMIT

:

15.0 hPa  (pressure)
25.0 m/s  (vector wind)
10.0 C     (sea surface temperature)
SELECTION CRITERIA : NOBS >= 20 AND ONE OR MORE OF THE FOLLOWING:
        wind direction (> 5m/s) wind speed pressure sea surface
temperature
  1. |BIAS| >= 30 degrees 5 m/s 4 hPa 3 C
  2. SD >= 80 degrees - 6 hPa 5 C
 

3.

%GROSS
 


 >= 25 % 25 % 25 % 25 %


FOR DD: IF SD=999, CANNOT COMPUTE AVE WIND DIRECTION. THUS SD IS INDETERMINATE

FROM JANUARY 2005, SHIP & BUOY STATISTCAL REPORTS ON WIND DIRECTION REQUIRE ONLY OBSERVED VALUES > 5.0 m/s