In This Space
Image credit: Hatfield Consultants
River/lake ice products based on synthetic aperture radar (SAR) satellite data can be delivered from the scale of a licensed project site to a regional scale that looks at cumulative impacts of multiple projects and developments. Products responds to needs that include ice related flooding, safe travel across ice cover, and grounded ice distribution as an indicator of available water sources and potential fish over-wintering habitat.
Radar images are not affected by cloud cover, meaning that a sequence of radar images can capture changes in ice cover regardless of atmospheric conditions. Ice monitoring services use methods of visual interpretation, image classification and change detection to generate products custom-tailored to user requirements.
Historical ice extent mapping is possible from a number of different radar sensors depending on the archive of radar images. New acquisitions of radar images to map ice extent may be planned, depending on the sensor.
The ice monitoring product delivers ice classification output (coded rasters) or ice extent information (vector polygons). Monitoring can include ice extent changes over time.
Known restrictions / limitations
Lifecycle stage and demand
Pre-License: Information on historical ice extent. Information on presence of ice extent in near-real-time depending on risk within operating area.
Exploration: Historical and real time information to support safe travel and operations.
Development: Critical historical information and real time for planning and design of infrastructure, to support understanding of ice conditions and risks in a proposed development area.
Production: Information on ice conditions and safe travel across ice in near real time depending on risk within operating area.
Decommissioning: Monitoring of ice conditions in support of reclamation and remediation.
Geographic coverage and demand
Demand and coverage is global, focusing on countries and areas susceptible to the formation of river and lake ice covers.
Input data sources
Radar: VHR2, HR1, HR2, MR1
Spatial resolution and coverage
Spatial resolution: 1-50 m.
Varies depending on input imagery used and client needs. In case of radar images speckle effects may reduce the final resolution of images.
Project site scale requirements: 1–5 m resolution with 1km coverage.
Basin scale requirements: 20–50 m resolution with 100x100 km coverage.
Minimum Mapping Unit (MMU)
Variable, depending on source data resolution, assumed scale of the final product and expected minimum size of the river and lake monitored. High resolution 25 m2, Basin 100‑250 m2, and Regional 500 m2.
Accuracy / constraints
Thematic accuracy: ice type classification accuracy is 90%.
Spatial accuracy: dependent on source data, but typically 1 pixel.
Accuracy assessment approach & quality control measures
Ground-based observations or validation surveys.
Statements of national or local institutions and local knowledge.
Frequency / timeliness
Observation frequency: Depending on sensor and beam mode (resolution/extent) selected, the frequency for new acquisitions can be as low as 3-5 days from the same satellite. Frequency of historical maps is highly variable depending on the archive.
Timeliness of delivery: Processing can be completed in near real time (< 24 hours) depending on the set up of the processing system and availability of base images.
On-demand availability from commercial suppliers.
New acquisitions can be requested globally.
Archived products available for public search. Availability may be limited for specific dates or locations.
Delivery / output format
# of Pages:
Internal – Project consortium and science partners
External – ESA
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