Availability of 1-min Data for 1990 
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1990    JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC 
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BEY     *#*
CKA     *** -** *** *-- *** #--
KMS     --# ##-
MIR     *** *** *** *## ### ### ### *## #*# ### ### ###
MOS                     ### ### ### **# #*- ##* #*# ###
SAL                     #** ##* ### ***     *## #*#
SBT                                 *#*
SEY     *** *** *-* --* #** *#* --* *-- *-# ##- -*- ***
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  "-" - No data;    "*" - gaps;    "#" - complete;