Ground motion data · Sentinel-1 · APSIS™

Millimetre ground motion for every pixel.
Delivered as data, not reports.

You bring the domain model. We supply the ground truth from orbit. APSIS™ InSAR returns millimetre-scale velocity and displacement for every pixel of terrain — including the vegetated and rural ground conventional methods leave blank — from open Sentinel-1 data.

Request API access See the data
100% terrain coverage ~1 mm/yr validated accuracy 24 hours from order to survey 10 years of history
Why APSIS™

Conventional InSAR measures cities. APSIS measures the country in between.

Persistent-scatterer and standard SBAS methods need radar-stable targets — buildings, rock, steel. APSIS™ (Advanced Pixel System using Intermittent SBAS), developed at the University of Nottingham, recovers motion from intermittently coherent ground, so every pixel of a scene carries a measurement.

100%terrain coverage — ~7% for PS methods in the UK
1.1–1.5 mm/yrvalidated accuracy, including rural ground
24 hoursfrom order to survey, anywhere — with a 10-year history
0corner reflectors or ground control
Sentinel-1 C-band · open data · contains modified Copernicus Sentinel data
From orbit to raster

From Sentinel-1 pass to delivered raster.

  1. 01

    Acquire

    Open Sentinel-1 radar over your area of interest, no tasking, no site visits.

  2. 02

    Process

    APSIS™ recovers displacement from intermittently coherent ground across the full scene.

  3. 03

    Resolve

    Line-of-sight motion from ascending and descending passes becomes vertical and east–west components.

  4. 04

    Deliver

    Velocity rasters, displacement time series, change signals and quality layers — GeoTIFF · COG · STAC — by API or bulk licence.

Full coverage by design

Measures where
others go blind.

Where radar-stable targets vanish — fields, forests, peat — classic methods return nothing. APSIS™ exploits intermittent coherence, so the measurement is a dense, continuous field over terrain no other method can monitor from space.

  • Full-coverage rasters over urban and rural ground alike
  • Vertical and east–west motion, resolved separately
  • Validated at 1.1–1.5 mm/yr against ground survey
  • Every pixel carries a quality layer
Conventional InSAR
Sparse points · urban only
APSIS™
Dense field · all terrain
What partners build

We don't sell the application.
Our partners do.

Water networks

Leak-risk indices from ground motion along mains and trunk sewers.

Rail & road

Embankment and cutting risk indices for whole routes, updated with every pass.

Insurance

Subsidence exposure at the postcode, for pricing and claims triage.

Peatland MRV

Restoration monitoring from ‘bog breathing’ across a landscape.

Mining & tailings

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

Energy & utilities

Reservoirs, pipelines, storage and geothermal sites at any footprint.
Interactive demo

This is what you receive.

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

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

Put ten years of ground motion
under your product.

Three ways to buy the data — API subscription, bulk data licence, territory partnership — and all of them let you resell what you build. Start with a sandbox key.

Get a sandbox key +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