Development of long-period seismometer for planet any explorataion

Abstract

In this study, our goal is to accomplish the longer resonant period of the seismometer on-board penetrator, which have velocity transducer, and a resonant period of about 1 second at present state. From this improvement, we expect that the seismometer detect the moonquake signal, whose period is much longer than 1 sec, for example surface wave and free oscillation. To investigate the present dynamic response for long period range, we made the seismic observation with this short-period seismometer and broadband seismometer STS-2. In this presentation, we indicate the results from the comparison between the observed signals of these seismometers. Next, we examined the negative force feedback system as the method for lengthening the resonant period of the seismometer on-board penetrator. When we select a method using some feedback system, we will simulate and evaluate the accomplished characteristic. Here, we will indicate the results from the simulation and discuss the expected results from the seismic observation with this seismometer, which have simulated characteristic.