Status display for seismometer-group recorder operations
Summer for group recorder
Suppressing constant frequency noise in seismic records
Synthetic display of seismic reflection strength
System for land seismic cable fault location
System for reading acoustic images
System for recording and processing seismic reflection signals
System for recording seismic reflection signals in serial-by-tra
System for recording seismic reflection signals in true amplitud
System for the multiplexed transmission of signals from seismic
Three-dimensional seismic display
Time synchronization
Towed hydrophone preamplifier and receiver
Transducer drive circuit for remote control transmitter
Transducer structure
Transformerless input for seismic data acquisition system
Two-receiver, variable-density logging system
Two-receiver, variable-density logging system
Two-wire multiplex seismic recording system
Ultrasonic wave horn