CONSTANT    2.877320E+17
ZEROS     2
  0.000000E+00  0.000000E+00
  0.000000E+00  0.000000E+00
POLES     5
 -5.026548E+02  0.000000E+00
 -1.005310E+03  0.000000E+00
 -1.130973E+03  0.000000E+00
 -1.480318E-01  1.480318E-01
 -1.480318E-01 -1.480318E-01

##################################################
###   2.304000E+06     Norm. Factor A0 (in Hz)   #
###   800.0   V/m/s                              #
###   1.589   microV/Count                       #
###           CMG-40T/30 (s/n: T4704)            #
###           REF130 (s/n: 9E15)                 #
###           Poles/Zeroes in rad/sec            #
##################################################
### Network Code: HA
### Station Code: SKIA
### Description : Skiathos
### Stream Code : HH
### Latitude    : 39.1665
### Longitude   : 23.4661
### Elevation   : 325
###
### Start Date  : 25-06-2008
### End Date    : 21-09-2010
 
###  PERIOD #2  ]=-----------------------------###
 
CONSTANT    2.877320E+17
ZEROS     2
  0.000000E+00  0.000000E+00
  0.000000E+00  0.000000E+00
POLES     5
 -5.026548E+02  0.000000E+00
 -1.005310E+03  0.000000E+00
 -1.130973E+03  0.000000E+00
 -7.401592E-02  7.401592E-02
 -7.401592E-02 -7.401592E-02

##################################################
###   2.304000E+06     Norm. Factor A0 (in Hz)   #
###   800.0   V/m/s                              #
###   1.589   microV/Count                       #
###           CMG-40T/60 (s/n: T4C34)            #
###           REF130 (s/n: 9E19)                 #
###           Poles/Zeroes in rad/sec            #
##################################################
### Network Code: HA
### Station Code: SKIA
### Description : Skiathos
### Stream Code : HH
### Latitude    : 39.1665
### Longitude   : 23.4661
### Elevation   : 325
###
### Comments    : instrum. change
###
### Start Date  : 21-09-2010
### End Date    : 30-06-2013
 
###  PERIOD #3  ]=-----------------------------###
 
CONSTANT    1.594720E+17
ZEROS     2
  0.000000E+00  0.000000E+00
  0.000000E+00  0.000000E+00
POLES     5
 -5.026548E+02  0.000000E+00
 -1.005310E+03  0.000000E+00
 -1.130973E+03  0.000000E+00
 -7.401592E-02  7.401592E-02
 -7.401592E-02 -7.401592E-02

##################################################
###   2.304000E+06     Norm. Factor A0 (in Hz)   #
###   800.0   V/m/s                              #
###   2.867   microV/Count                       #
###           CMG-40T/60 (s/n: T4C34)            #
###           CMG-DM24S6-EAM                     #
###           Poles/Zeroes in rad/sec            #
##################################################
### Network Code: HA
### Station Code: SKIA
### Description : Skiathos
### Stream Code : HH
### Latitude    : 39.1665
### Longitude   : 23.4661
### Elevation   : 325
###
### Comments    : digit. change
###
### Start Date  : 30-06-2013
### End Date    : currently used (25-11-2015)