CONSTANT    4.000000E+08
ZEROS     2
  0.000000E+00  0.000000E+00
  0.000000E+00  0.000000E+00
POLES     2
 -2.230000E-01  2.230000E-01
 -2.230000E-01 -2.230000E-01

##################################################
###   1.000000E+00     Norm. Factor A0 (in Hz)   #
###  1000.0   V/m/s                              #
###   2.500   microV/Count                       #
###           LE-3D/20                           #
###           PS6-SC                             #
###           Poles/Zeroes in rad/sec            #
##################################################
### Network Code: HL
### Station Code: PTL
### Description : Penteli
### Stream Code : HH
### Latitude    : 38.0473
### Longitude   : 23.8638
### Elevation   : 500
###
### Start Date  : 14-09-2007
### End Date    : 10-09-2010
 
###  PERIOD #2  ]=-----------------------------###
 
CONSTANT    5.243927E+13
ZEROS     2
  0.000000E+00  0.000000E+00
  0.000000E+00  0.000000E+00
POLES     4
 -3.600000E-02  3.800000E-02
 -3.600000E-02 -3.800000E-02
 -2.220000E+02  2.220000E+02
 -2.220000E+02 -2.220000E+02

##################################################
###   2.495880E+03     Norm. Factor A0 (in Hz)   #
###  2000.0   V/m/s                              #
###   3.758   microV/Count                       #
###           KS2000                             #
###           DR24-SC                            #
###           Poles/Zeroes in rad/sec            #
##################################################
### Network Code: HL
### Station Code: PTL
### Description : Penteli
### Stream Code : HH
### Latitude    : 38.0473
### Longitude   : 23.8638
### Elevation   : 500
###
### Comments    : instrument changes
###
### Start Date  : 10-09-2010
### End Date    : currently used (25-11-2015)