VOS-Clim ship suspect list for April 2006
   **********************************************
	   
 Monitoring centre:  Met Office, UK.

 All VOS-Clim ship data is monitored: against background 6-hour forecast fields
 for all variables except SST, for which analysed fields from the previous day 
 are used.

 Key to table below
 ------------------
 NumObs : number of observations from the ship during the month
 %GE    : percentage of obs with gross errors (for GE limits see below)
 StdDvn : standard deviation of obs-background, excluding obs with gross errors
 Bias   : mean obs-background, excluding obs with gross errors
 RMS    : root mean square of obs-background, excluding obs with gross errors

 Suspect selection criteria for each variable:
    At least 20 observations from the ship and one or more of the following:-
    %GE      >  10%
    |Bias|   >  Bias limit (see below)
    StdDvn   >  StdDvn limit (see below)
 
 Limits:       | Press.| Wind Speed | Direct.| Air Temp.| Rel.Hum.|  SST   |
 -------       | (hPa) |   (m/s)    | (deg)  | (deg C)  |  (%)    | (deg C)|
 Bias limit    |  2.5  |     5      |   30   |   2.0    |  10     |   2.0  |
 StdDvn limit  |  5.0  |    10      |   60   |   4.0    |  20     |   4.0  | 
 GE limit      | 15.0  |    25      |  150   |  10.0    |  50     |  10.0  |


Callsign   Element   NumObs   %GE   StdDvn   Bias    RMS
------------------------------------------------------------

 CGDS        Press     166     0     4.5    -2.9     5.4

 OVZV2       Direc      22     0   109.6    32.9   114.4

 A8CN8       Temp       29     0     1.4     2.2     2.6
 VCLM        Temp      226     0     2.9     2.2     3.6

 CGDS        RelHu     166     0    13.0   -11.4    17.3
 CG2960      RelHu     105     0    14.9   -10.1    18.0
 MSTM6       RelHu      57     0    14.3   -10.6    17.8
 MTDM5       RelHu      25     0    10.0    10.3    14.4
 VCLM        RelHu     223     0    14.8   -14.3    20.6
 V2FM        RelHu      28     0     8.3    10.0    13.0

 C6IZ7       SST        22     0     1.1     2.2     2.5
 ELVG7       SST        29     0     1.2     2.3     2.6