Geophysical software & survey instruments

See what
the earth hides.

TERRA — earth. SCRY — to discern what is hidden.TERRASCRY: seeing what the earth hides.

Survey software. Purpose-built instruments.

We are developing geophysical tools for missing-person and aircraft-recovery investigations. Survey the surface, investigate selected areas with a probe grid, and bring the measurements together in a shared view of the ground.

Explore the survey workflow Request a briefing

Product development · Evaluation and procurement inquiries welcome

The survey, in contextInterface design concept
Design concept showing survey paths and modeled anomalies over riverbank imagery, with layers and properties alongside the map.
Map, measurements, and interpretation in one view. Design concept with illustrative geography and signals; not a survey result.

Our mission

What we’re
looking for.

We are building TERRASCRY to support the search for missing people and lost aircrews, and the investigation of ground shaped by conflict. The starting point is physical evidence: metal, disturbed soil, and buried features.

01Crash-site recovery

Aircraft wreckage and metal debris.

Ferrous and non-ferrous fragments, components, and debris concentrations that can help recovery teams investigate a crash site.

02Burial-site investigation

Disturbed ground and buried features.

Backfilled pits, trenches, possible grave shafts, and changes in soil. These are physical clues to investigate—not confirmation of human remains.

03Hazard assessment

Metal anomalies that need expert review.

Responses that may warrant assessment for unexploded ordnance (UXO) or other buried metal. Identification and clearance require qualified specialists.

These are intended investigation targets. What a survey can reveal depends on the material, depth, ground conditions, and measurement geometry. Archaeological and research teams can use the same methods to investigate other subsurface questions.

Intended survey workflow

Survey the area.
Investigate the signals.

Use TERRASCRY to prepare and review a survey at every stage. Pathfinder is intended to locate areas worth a closer look. Where appropriate, HIRT adds a focused investigation between inserted probes.

  1. 01Screen the surfacePathfinder
  2. 02Investigate a selected volumeHIRT · where appropriate
  3. 03Compare and interpretTERRASCRY

01 · Pathfinder

Walk survey lines.
Map changes in the ground.

A harness-supported instrument is designed to collect measurements along walking routes. Magnetic gradiometry measures changes in the magnetic field; above-ground electromagnetic coils add information about conductive soil and metal, including non-ferrous metal.

  1. Cover the area. Record the instrument’s position as measurements are collected along survey lines.
  2. Look for contrasts. Compare magnetic and conductivity responses with the surrounding ground.
  3. Select follow-up areas. Review unusual responses alongside site records and terrain before planning closer investigation.
Inspect Pathfinder hardware
Surface surveyDesign schematic
Pathfinder surface survey lines and areas for follow-upParallel walking routes cross a survey area. Two illustrative response concentrations stand out from the surrounding ground; one is outlined as an area for closer investigation. They are not identified objects.
Walking route Response concentrationIllustrative responses guide follow-up; they do not identify a buried object.

02 · HIRT

A probe grid.
Measurements between probes.

HIRT means Hybrid Inductive-Resistivity Tomography. Its design places sensing elements at known positions and depths within a selected area. Measurements across different probe combinations help constrain a three-dimensional model of that volume.

  1. Define the investigation volume. Plan probe positions around the area of interest, with site-specific access and safety assessment.
  2. Measure complementary responses. Inductive coils and electrical contacts provide different information about the ground.
  3. Estimate the structure. Combine many measurements to investigate the position and extent of physical-property contrasts.

HIRT requires ground insertion. On suspected hazardous ground, qualified assessment and clearance come before insertion. Probe count, spacing, depth, and suitability depend on the site.

Inspect HIRT hardware
Probe-grid investigationDesign schematic
HIRT probe grid and subsurface investigation volumeNine illustrative vertical probes form a surface grid and extend into a subsurface volume. Surface electronics connect the probes. Shaded regions represent a conceptual sensing relationship across the volume, not computed sensitivity or straight-ray paths. TXRX ABMN

Induction · coilsA transmitting coil produces a changing magnetic field. Receiving coils measure the response, providing information about conductive materials between and around the probes.

Probes Illustrative property contrastIllustrative grid and sensing regions; spacing and coverage vary by survey.

03 · TERRASCRY software

Turn measurements
into an interpretation.

Survey readings are evidence. A subsurface model is an estimate built from those readings and physical assumptions. TERRASCRY is being developed to compare them with terrain, imagery, and site records—and make uncertainty visible before a team decides what to investigate next.

Explore the software

This is the intended instrument-to-software workflow. Hardware qualification, live acquisition, and broader sensor integration remain in development. Suspected hazardous ground requires specialist assessment before any probe insertion.

Survey instruments

Two instruments.
Distinct survey roles.

Pathfinder addresses handheld survey acquisition. HIRT focuses on crosshole imaging. Both are in development alongside the TERRASCRY software platform.

CAD render of the complete Pathfinder handheld assembly, showing its frame, controls, and three sensor stations.
Pathfinder handheld assembly · CAD renderDevelopment geometry; illustrative materials and finish.
P / 01In development

Pathfinder

Handheld magnetic and electromagnetic surveying

A handheld survey system being developed for near-surface magnetic gradient and electromagnetic conductivity measurements, with a modular sensor arrangement and georeferenced acquisition.

Intended role Portable acquisition for site-scale geophysical surveys.

Discuss Pathfinder
Enlarged CAD cutaway of the HIRT sensor module, showing its housing and internal sensing components.CAD render of the complete HIRT probe string with tip, rod sections, two sensor bodies, and cable-exit cap.
HIRT sensor cutaway and probe assembly · CAD rendersSensor detail enlarged; short-rod inspection configuration.
H / 02In development

HIRT

Crosshole subsurface imaging

A dual-channel crosshole tomography system being developed to collect complementary measurements between inserted probes and investigate a focused subsurface volume.

Intended role Targeted subsurface characterization using a distributed probe array.

Discuss HIRT

Product specifications, evaluation availability, and development timelines are discussed directly. CAD renders show development configurations. Bench and field qualification remain to be completed.

TERRASCRY software

Survey data.
Spatial context.
Physical models.

A survey workspace for reviewing recorded geophysical data alongside terrain, imagery, and subsurface models. Designed for field review and detailed analysis.

3D interface design concept showing terrain, a subsurface model, and a linked cross-section.
3D and section design concept. Illustrative geometry and signals.

Map, 3D & cross-section

Inspect the same site
from multiple views.

Move between the map, a 3D view, and a cross-section. Compare terrain and imagery with recorded readings and modeled results.

  • Keep source measurements distinct from model outputs
  • Inspect layers, depth bands, and selected features
  • Retain notes and the context behind an interpretation

Site preparation

Organize sources
before interpretation.

Combine recorded surveys with geographic context. Review source layers and coverage before interpreting the measurements.

In development: recorded magnetic survey workflows, terrain and imagery, local run records, and model inspection. Broader sensor integration and live field acquisition are ongoing work.

Site-preparation design concept showing a site map with source layers, coverage, and offline planning controls.
Site-preparation design concept. Source details and coverage are illustrative.

Government, universities & institutions

Start with the
technical requirements.

TERRASCRY welcomes discussions with government agencies, research institutions, and commercial survey organizations evaluating subsurface technologies.

Technical evaluation

Discuss the measurement requirements, data formats, operating environment, and validation evidence your team needs to assess suitability.

Procurement planning

Request product information and discuss development schedules, evaluation options, and support requirements before planning a purchase.

Research collaboration

Discuss field studies, reference datasets, instrument testing, and methods development.

Request a technical briefing

Product & partnership inquiries

Discuss your
survey requirements.

Contact us about TERRASCRY software, Pathfinder or HIRT instruments, technical evaluation, or future procurement.

Contact TERRASCRY