GAMMA Remote Sensing AG is a leading innovator in lightweight radar systems and advanced microwave remote sensing technology. Our portfolio includes state-of-the-art synthetic aperture radar systems—GLSAR and GSSAR—as well as the high-performance real aperture radar GPRI, and the precision radiometer ELBARA.
In addition to our standard products, we offer contract-based development of specialized instruments—like the SnowScat and WBScat systems created for the European Space Agency.
To obtain more information or to get a quote please contact us.
GAMMA’s SAR systems are compact, lightweight, and engineered for flexibility. They support single or alternating transmit modes (one or two ports) and offer up to four parallel receiver channels—making them ideal for high-resolution imaging, SAR interferometry, and polarimetry. Designed for seamless integration, these systems can be mounted on a wide range of platforms, including vehicles, UAVs, and manned aircraft.
L- and S-band systems:
Gamma offers two different frequency bands:
GAMMA L-band SAR (GLSAR), operating between 1.2 and 1.4 GHz, slant range resolution: 0.75m
GAMMA S-band SAR (GSSAR), operating between 3.0 and 3.4 GHz, slant range resolution: 0.38m
The systems are available with built-in GNSS-aided inertial navigation system (INS). The GNSS/INS provide centimeter-level (or better) relative positioning information as required for SAR processing of data acquired on non-linear sensor trajectories.
UAV-borne SAR, Car-borne SAR: The GAMMA SAR systems, including transmit/receive radar antennas and GNSS antennas, can be mounted on a carbon frame. In this configuration, the complete SAR system weights below 6.5 kg and can be attached to a UAV or mounted on the roof rack of an automobile.
Airborne SAR: The compact and modular design also allows integrating the SAR systems on manned aircraft. If desired larger antennas (with higher gain) are available.
SAR imaging and further processing (repeat-pass interferometry, polarimetry, etc) is supported by the Time Domain Back Projection (TDBP/GEO) processor and the modules ISP/DIFF&GEO of the GAMMA Software GAMMA Software.
Further details and imaging examples are provided in the GAMMA SAR system brochure. Browse also the list of publications. UAV/car-borne SAR displacement measurements have been presented at the SGM2020.
The GPRI uses rotating real-aperture antennas to cover a full 360° field of view. The GPRI operates at Ku-band (17.2 GHz with 200 MHz bandwidth). Designed for mobility, the GPRI can be mounted quickly on a tripod or survey pillar. The real-aperture antennas limit signal decorrelation so that interferometric measurements are possible up to a radius of several kilometers, even on water surfaces.
First instruments were built in 2010, with a quad-polarimetric version in 2015. A bistatic version is available since 2016.
For details see instrument specification, download the GPRI info brochure (pdf) and browse the list of selected publications. A more extensive list of application-related publications is also available.
The ELBARA-II is a 1.4 GHz radiometer, built to support ground-based signature studies and cross-comparison campaigns related to the ESA SMOS and NASA SMAP satellite radiometers. A first series of instruments was built under ESA contract. Further instruments were then specifically built for interested customers from academia.
