ICEYE SAR Satellite

ICEYE’s SAR satellite is a roughly 100 kg-class synthetic aperture radar microsatellite operated by the Finnish company ICEYE from low Earth orbit. The first of the line, ICEYE-X1, was launched in January 2018 aboard an Indian PSLV, becoming the first SAR satellite under 100 kg ever flown. The platform fills a niche that until then had been the preserve of multi-tonne national reconnaissance birds: persistent, all-weather, day-and-night radar imagery delivered on a tasking cycle measured in hours rather than days, at a price point that brings the capability within reach of mid-size states and commercial customers.

The satellite carries an X-band SAR with on-board processing and supports several imaging modes, including a spotlight mode advertised at around 25 cm ground resolution over a small scene and stripmap and scan modes that trade resolution for area. Each spacecraft is built around a deployable mesh antenna and a custom radar back-end developed in-house at ICEYE’s facility in Espoo. Coherent change detection — comparing two SAR passes over the same patch of ground to surface vehicle tracks, freshly dug revetments, or moved equipment — is a routinely advertised product, as is sub-daily revisit thanks to the constellation, which has grown past forty satellites since 2018 and continues to expand with regular Falcon 9 rideshare launches.

Finland was the first state operator and remains a domestic anchor customer. Ukraine became the most visible one: in August 2022 the Serhiy Prytula Charity Foundation announced that funds raised from the Ukrainian public had been used to buy a dedicated ICEYE satellite plus access to the wider constellation for the Armed Forces of Ukraine, a deal Kyiv has openly credited for tracking Russian movements behind the front. The United States is a significant customer through the National Reconnaissance Office’s commercial radar contracts and through US Navy and Air Force research awards. Brazil signed a multi-satellite contract in 2024 for a sovereign SAR capability, and the United Arab Emirates fields the system through a partnership with Space42 (formerly Bayanat) under the Foresight programme.

Variants in service include the Generation 3 spacecraft now flying and a larger Generation 4 design announced for first launch in 2025, with improved resolution and longer dwell times. ICEYE has also begun selling complete satellites to governments that want sovereign capacity rather than imagery alone — Brazil, Poland, and Greece have all taken that route. The product sits at the centre of a small commercial-SAR market that includes Capella Space, Umbra, and Synspective, and within it ICEYE is the operator with the largest fleet on orbit and the deepest combat-relevant track record.