Table 1.

Comparison of main characteristics of three fiber optic rotational seismometer.

Performance	RotSensor3C	R-2	BlueSeis3A
Sensor self-noise $({\mathrm{rads}}^{-1}/\sqrt{\mathrm{Hz}})$	$1.2\times {10}^{-7}$	$6.0\times {10}^{-8}$	$2.0\times {10}^{-8}$
Frequency range	0.005–125 Hz	0.03–50 Hz	0.001–100 Hz
Dynamic range	152 dB	117 dB	135 dB
Scale factor linearity	<10 ppm	No data	<20 ppm
Dimensions (L × W × H)	190 × 190 × 165 mm	120 × 120 × 102 mm	300 × 300 × 280 mm
	(No battery)	(No battery)
Weight	4.5 kg (No bat.)	9.53 kg (No bat.)	20 kg