Abstract: Generating a three-dimensional (3-D) map of an object using feature-presence data, pose data regarding the poses of one or more feature-detection instruments, and/or sensor(s) thereof, when collecting the feature-presence data, and a triangulation algorithm that operates upon the feature-presence data and pose data to determine datapoints indicating presence of the object. In some embodiments, each feature-detecting instrument is a non-ranging instrument that can detect feature presence through material(s) and/or structure(s) that prevent the object from being viewed directly. In some embodiments, the 3-D map is used to generate mixed-reality images that present visualizations of the 3-D map fused with environmental images of the environment in which the object is located. In some mixed-reality applications, the environmental images are acquired using one or more suitable instruments, such as visible-light camera/s), infrared camera(s), and ranging-type sensors (e.g., radar), among others.

Abstract: Submersible testing units (STUs) that each include either one or more sample chambers for acquiring one or more samples, e.g., from a body of water, or one or more submersible sensors for acquiring sensor data, e.g., from the body of water, or both one or more sample chambers and one or more submersible sensors. In some embodiments, an STU includes multiple sample chambers that can be opened and closed independently of one another. In some embodiments, an STU having one or more submersible sensors is part of an STU deployment system that transmits sensor data to a data-collection node in real time while the one or more submersible sensors are submerged. Related components, systems, methods, and software are also disclosed.

Abstract: An improved Ground Penetrating Radar (GPR) system is provided. The system advantageously employs full waveform digitization of a returning signal to significantly reduce the number of launch signals and allowing the amount of radiation emitted to stay within the limit set by the Federal Communications Commission (FCC), while producing a robust information detection signal. In addition, intermittent large latent-duty-cycle sampling employs a less expensive digitizer typically used in prior art GPRs. The system is scalable at low-cost to accommodate multi-antenna multi-static testing for subsurface tomographic imaging.

Abstract: A vibrating magnetic antenna for generating reversable magnetic dipoles is provided. Soft magnetic materials are used to project the magnetic field as the magnet moves linearly between soft magnetic stators arranged in a “Y” configuration. The soft magnetic stators include a nickel-iron alloy, having high magnetic permeability. Also provided is a magnetic coupling circuit for upshifting the frequency of the magnetic field.

Abstract: A vibrating magnetic antenna for generating reversable magnetic dipoles is provided. Soft magnetic materials are used to project the magnetic field as the magnet moves linearly between soft magnetic stators arranged in a “Y” configuration. The soft magnetic stators include a nickel-iron alloy, having high magnetic permeability. Also provided is a magnetic coupling circuit for upshifting the frequency of the magnetic field.

Abstract: An improved Ground Penetrating Radar (GPR) system is provided. The system advantageously employs full waveform digitization of a returning signal to significantly reduce the number of launch signals and allowing the amount of radiation emitted to stay within the limit set by the Federal Communications Commission (FCC), while producing a robust information detection signal. In addition, intermittent large latent-duty-cycle sampling employs a less expensive digitizer typically used in prior art GPRs. The system is scalable at low-cost to accommodate multi-antenna multi-static testing for subsurface tomographic imaging.