Millimetre ground motion for every pixel.

See the ground move
before it costs you.

Patented APSIS™ technology turns free satellite radar into millimetre-precise maps of ground motion — across cities, assets, farmland and peatland that conventional InSAR simply can't measure.

Book a consultation Explore the technology
Award-winning · built in the UK ±1 mm/yr sensitivity 100% terrain coverage 0 ground equipment
The science of APSIS™

InSAR, perfected for
the real world.

Interferometric Synthetic Aperture Radar compares satellite radar passes over time — tiny phase shifts reveal how far the ground moved. APSIS™ (Advanced Pixel System using Intermittent SBAS), developed with the University of Nottingham and protected by patent, extends that measurement to vegetated and natural terrain where classic InSAR goes blind.

±1 mmmotion detected, per year
100%coverage over natural terrain
10+ yrof Sentinel-1 radar archive
0reflectors or sensors installed
Sentinel-1 C-band radar · imaging day & night, through cloud
From orbit to insight

How your motion map is made.

  1. 01

    Acquire

    Years of Sentinel-1 radar passes over your area of interest are assembled — no tasking, hardware or site visits.

  2. 02

    Process

    The patented APSIS™ algorithm recovers displacement from intermittently-coherent ground across the full scene.

  3. 03

    Resolve

    Line-of-sight motion from ascending and descending passes is decomposed into vertical and east–west vectors.

  4. 04

    Deliver

    GIS-ready rasters, per-point time series and expert interpretation — decisions, not just data.

Full coverage by design

Measures where
others go blind.

Persistent Scatterer and standard SBAS methods need radar-stable targets — buildings, rock, steel. Over fields, forests and peat those targets vanish. APSIS™ exploits intermittent coherence, returning a dense, continuous field of measurements over terrain no one else can monitor from space.

  • Continuous coverage across urban and rural landscapes
  • Vertical and east–west motion, resolved separately
  • From a few millimetres to centimetres per year
  • Baselines reconstructed from years of archived radar
Conventional InSAR
Sparse points · urban only
APSIS™
Dense field · all terrain
Where it's used

One measurement. Every sector that stands on the ground.

Infrastructure

Rail, roads, dams, bridges & pipelines — spot subsidence before it becomes failure.

Mining & tailings

Independent, off-site monitoring of tailings dams, pits and subsidence.

Peatland & carbon

Evidence restoration outcomes and peat condition at landscape scale.

Insurance & risk

Portfolio-wide subsidence exposure to price risk and triage claims.

Construction

Baseline ground conditions and monitor excavation impact on neighbours.

Energy & utilities

Reservoirs, networks, geothermal and storage — the widest footprint.
Interactive demo

This is what you receive.

Every point is a measurement. Hover to read its velocity; click for a 36-month time series. Delivered as GIS-ready rasters and per-point series over your area of interest.

−14.6 mm/yr
Vertical velocity · hover a point
Illustrative data for demonstration — not real survey results.
Start with a conversation

Find out what's moving
beneath your assets.

Send us your area of interest. We'll tell you what APSIS™ can measure there, how far back we can look, and what it costs — in a free 30-minute consultation.

Email the team +44 (0)1156 712 180

Millimetre ground motion for every pixel.

Terra Motion Ltd

Developed with, and trusted by

University of NottinghamEuropean Space AgencyNatureScotStantecGeospatial Insight