MENLO PARK, Calif., - EOS Data Analytics Inc. (EOS) recently unveiled EOS SAR – a project to develop its own synthetic aperture radar (SAR) sensors intended for deployment in a constellation of microsatellites.
EOS engineers have already designed a radar prototype and are moving ahead with the development of a SAR payload for small satellites with a resolution down to 25 cm. EOS SAR satellites will operate in Stripmap and Spotlight modes (including interferometry) and will cover a wide range of applications. EOS is also considering dual-frequency SAR in X-band and S-band on a single satellite. Dual-band operation increases versatility for all weather imaging and improves object-ground contrast. A special configuration of the radar front end allows for imaging of selected areas in both bands in a single orbit.
The SAR payload incorporates a deployable reflector antenna developed in-house at EOS. This antenna technology enables EOS SAR instrument to improve satellite efficiency and offer superior image quality. Moreover, the antenna itself has low mass and dimensional characteristics, making it more favorable and less costly to launch the satellite into orbit.
EOS is building a SAR satellite payload suitable for constellations enabling high revisit rates. A constellation of 12 satellites will provide 2-3 hours revisit time for a given area. The first SAR satellite launch is expected in 2022, with commercial constellation operations beginning in 2023.