The mobile mappers that we see on vehicles have very high-end inertial measurement units (IMUs ... it’s going to be all the GPS or Galileo constellation — not, say, satellite 32. Our survey-grade ...

Figure 10.8: GPS for marine seismic surveying. Different methods are used in marine seismic surveys depending on the water depth. In deep waters, seismic vessels tow seismic cables, known as streamers ...

In rough areas, dynamite is still being used as the energy source. Figure 10.7: GPS for land seismic surveying. As the acoustic energy (signal) crosses the various underground rock layers, it is ...

Federal efforts to install additional seismometers around Glacier Peak have been delayed by ground conditions and logistical ...