![GEOPHYSICS, SEISMIC, and ATMOSPHERICS RESEARCH RECEIVER](https://d27wgn5g4t3wja.cloudfront.net/img/8dc02897-1422-08df-aab4-7a6ca6f32775/67363.png)
GEOPHYSICS, SEISMIC, and ATMOSPHERICS RESEARCH RECEIVER
Type RAS-1 - National RF, Inc
Called the RAS-1, the receiver is designed for ultra low and very low frequency scientific research work, including the exploration of low frequency emissions due to seismic and earth-quake activity, study of atmospheric phenomenon such as "whistlers", and low frequency Sudden Ionospheric Disturbance (SID) and electromagnetics phenomenon. The RAS-1 will receive signals from under 200 Hz. To over 250 KHz in both narrow bandwidth modes as well as broad badnwidth reception.