BUBBLE
SUMMARY REPORT ON DROPPED RECORDS IN SONIC DATA AQUISITION

PERIOD JUNE 1 to JULY 15 2002
PERCENTAGE OF 30MIN BLOCKS WITH DROPPED RECORDS

BSPR : BASEL-SPERRSTRASSE
A Sonic (METEK USA-1) : 10.39%
B Sonic (METEK USA-1) :  7.00%
C Sonic (Gill R2O)    :  0.70%
D Sonic (Gill R2O)    :  0.32%
E Sonic (Gill R2A)    :  0.33%
F Sonic (Gill HS)     :  0.14%
G Sonic (CSI CSAT3)   :  1.62%
H Sonic (Young 81000) :  0.00%
C Li7500 Digital      :  5.89%

BSPA : BASEL-SPALENRING
A Sonic (METEK USA-1) :  9.61%
B Sonic (METEK USA-1) :  9.51%
C Sonic (METEK USA-1) :  9.35%
D Sonic (METEK USA-1) :  8.47%
E Sonic (METEK USA-1) : 11.48%
F Sonic (METEK USA-1) : 10.60%

ALLS ALLSCHWIL
A Sonic (CSI CSAT3)   :  4.10%
B Sonic (METEK USA-1) :  0.30% [MD=0]
B Sonic (METEK USA-1) :  0.30% [MD=0]