Availability of 1-min Data for 1988 
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1988    JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC 
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BEY     *#*         -** *#* *#*
CKA                             -** *#* #*# *** --* *-*
CPS     ##* #*- ##* *** #** **# #** ### ### *## #** #*#
DIK     *-* **# *#*             --* *** *** **-     -**
MIR     *## ### ### ### ### ### ### ### #** ### #*# ##*
SAL     *** *-- *** ##* *#* *-* #*-
SBT             **#
SEY             **# *-* *#* *-- --* *** *#* #** *** ***
TIK                         --* **# ##*
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  "-" - No data;    "*" - gaps;    "#" - complete;