The MetaSensing Electronic Corner Reflector - C band (ECR-C) is a compact active transponder developed for the end-users of satellite-borne C-band Synthetic Aperture Radars.

Advantages
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A more compact alternative to standard passive corner reflectors, which can be meters in size
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Allows for accurate calibration of satellite radar data, including location and atmospheric data
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Operation frequencies compatible with Sentinel-1A and -1B and RADARSAT-2
Key features
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Operational frequency: C-band (5.4 GHz)
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Bandwidth: up to 100MHz
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Capability to measure vertical displacements of 1 mm
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Control and Configurations with a provided GUI
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GSM/WiFi for remote control
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GPS for clock and position information
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Standard USB connection
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Storage of up to 1000 activation and deactivation times
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Size [mm]: 650 (L) x 400 (W) x 233 (H)
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Weight: < 10 Kg
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Power Supply: two field-replaceable batteries, solar panels, AC mains
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Polarization: horizontal, vertical (user selectable via software)
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Ascending and descending orbits covered with one transponder (user selectable via software)
ECR-C is a user-deployed permanent scatterer designed to receive a weak signal from a satellite radar, amplify and filter this signal, and transmit it back to the satellite. This allows for very precise measurements of location and relative displacement, invaluable for satellite-based Differential Interferometric Synthetic Aperture Radar (DInSAR) measurements.
The user is required to provide the time and duration of satellite overpasses, which can be uploaded to the ECR-C with a user-friendly control software over USB connection. The ECR-C is designed to have an active amplification mode while a satellite is passing overhead, and a sleep mode while waiting for a satellite to pass over.