Uploaded July 2025 | Updated September 2026, 1 week ago

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[4K UHD] To create a NATO Recognized Electromagnetic Picture (REMP), today’s warfighters depend on rugged, highly mobile, hard to detect and interoperable Electronic Support Measures (ESM) sensors to survive and win in a peer or near-peer conflict.
Saab’s Sirius Compact L20C passive Communications- ESM (C-ESM) sensor. Due to its low-SWaP design, Sirius Compact L20C offers rapid deployment across all Electromagnetic Warfare (EW) operations; bringing passive sensing to disputed borders or even to the front-line.
As a member of the Sirius Compact family of passive ESM sensors, L20C reflects the need for agility and will integrate smoothly with almost any vehicle (including Unmanned Ground Vehicles – UGVs) or static mast. It can be operated both while on the move and remotely. L20C can be quickly mounted and dismounted without tools.
A crew of two can comfortably carry the sensor and its accessories into the most non-permissive environments.

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Video/editing: Jukka O. Kauppinen
Video assets provided by Saab
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Frequency coverage 20 MHz to 3 GHz (6 GHz optional)
Interfaces Ethernet, 18 to 32 VDC
Weight Less than 25 kg for complete C-ESM kit w/o batteries
Positioning Integrated IMU/GNSS

Sirius Compact C-ESM kit
A Sirius Compact C-ESM kit consists of a lightweight Compact Digital Antenna, a ruggedized Processing Box that will easily fit into a daypack, and a roughbook or ruggedized tablet. Power supply can be sustained using NATO standard batteries (e.g. BB-2590) or any other energy source available when supply lines are disrupted. Sirius Compact C-ESM can be mounted on an optional tripod or any other static or mobile mast system.

Sirius Compact C-ESM will detect, locate, classify and track communication signals.

Establish a NATO REMP
Conduct tactical EW Reconnaissance (RECCE) missions
Build an enemy force Electronic Order of Battle (EOB) picture using a Threat
Library or Knowledge Database (KDB)
Support Ground Based Air Defense (GBAD) and Counter Unmanned Aircraft Systems (C-UAS) missions
Support Force Protection (FP) and protection of Critical National Infrastructure (CNI) tasks
Build mobile or semi-mobile sensor networks for border protection, enhancing strategic Communications Intelligence (COMINT) assets
Setup unmanned mobile sensor networks and conduct UGV-borne RECCE missions, thus reducing exposure of troops to hostile fire

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