GRFO

Amplitude Response to Ground Displacement:
The complex poles and zeros of the LP channel are (ground displacement)

zeros:				poles:
(-0.126, 0.0)			(-4.65,3.46)
(-50.1,0.0)			(-4.65,-3.46)
(0.0,1.05)			(-0.118,0.0)
(0.0,-1.05)			(-40.7,0.0)
(0.0,0.0)			(-100.0,0.0)
(0.0,0.0)			(-0.15,0.0)
(0.0,0.0)			(-264.0,0.0)
(0.0,0.0)			(-3.93,0.0)
(0.0,0.0)			(-0.282,0.0)
				(-0.201,0.241)
 				(-0.201,-0.241)
   				(-0.134,0.1)
   				(-0.134,-0.1)
   				(-0.0251,0.0)
   				(-0.00924,0.0)
   				(-0.855,0.255)
   				(-0.855,-0.255)
  				(-0.542,0.683)
   				(-0.542,-0.683)

K = 0.97e5 to normalize at T = 25 s

Amplitude frequency table LP channel

Period (s)	Amplitude  (relative)  		Phase   (deg)
1000       		0.0000194   			392
500       		0.000408    			349
250       		0.00589     			294
100       		0.111       			199
80       		0.203      			168
60      		0.406       			123
50       		0.584       			88
40       		0.819        			43
30       		1.02       			-25
25       		1.00       			-73
20      		0.805     			-133
15       		0.433      			-211
10       		0.0967     			-315
7       		0.00879    			-394
6      			---- Notch ----
5       		0.00205    			-308
4       		0.00141    			-355
3       		0.000472   			-406

The complex poles and zeros of the SP channel are (ground displacement)

zeros:				poles:
(-0.126,0.0)			(-4.65,3.46)
(-50.1,0.0)			(-4.65,-3.46)
(0.0,0.0)			(-0.118,0.0)
(0.0,0.0)			(-40.7,0.0)
(0.0,0.0)			(-100.0,0.0)
(0.0,0.0)			(-0.15,0.0)
   				(-264.0,0.0)
				(-16.7,3.4)
   				(-16.7,-3.4)
   				(-63.3,0.0)
   				(-63.3,0.0)

K = 0.679e10 to normalize at T = 1 s.

Amplitude frequency table SP channel

Period (s)  	Amplitude (relative)    Phase (deg)
10.0       	0.00194     		267
5.0       	0.0155      		244
2.0       	0.215      		192
1.67      	0.342       		176
1.25      	0.663       		146
1.00      	1.00        		117
0.833     	1.29         		94
0.667     	1.64         		65
0.500     	1.95         		26
0.400     	2.04         		-4
0.333     	1.98        		-29
0.250     	1.71        		-68
0.200     	1.38       		 -99
0.143     	0.862      		-145
0.100     	0.396      		-192