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Ceros 200

Optimal weapon control onboard

Carl-Erik Leek
Head of Marketing & Sales
+46 8 580 84788

Ceros 200 is a radar and optronic tracking system designed for use on naval vessels. When interfaced with modern missile or gun systems, it provides excellent defence against any modern threat, including advanced sea-skimming missiles or asymmetric surface threats in littoral environments.

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With world-class performance in terms of acquisition speed and tracking precision, combined with its ability to track any target in any weather, CEROS 200 offers the advantage of full performance against any threat, including asymmetric threats in littoral environments.


The coherent radar transmitter provides reliable performance even in poor weather. Depending on the clutter situation and ECM threat, the radar selects its frequency agility pattern between 32-pulse bursts and pulse-Doppler signal processing, 4-pulse bursts and MTI processing, and pulse-to-pulse agility. The PRF and pulse width are selected depending on the range to the target.

The new digital receiver, combined with the improved signal processing, enables a greater degree of flexibility of e.g. pulse length and waveform for adaptation to new threats. The transmitted pulses are frequency coded and pulse compression in the receiver ensures a high range resolution in all modes.

The radar design incorporates many ECCM features:

  •      Very low antenna side lobes
  •      Very wide bandwidth
  •      A large number of transmission frequencies
  •      Random selection of frequency
  •      Lock On Jam, Track On Jam


The CEROS 200 has a new advanced video tracker to enhance the passive modes; passive search, detection and tracking. It includes sensor fusion, i.e. simultaneous TV and IR tracking, correlation tracking and background suppression.

Up to four simultaneous targets are automatically detected during acquisition and tracking within the field of view. This allows the operator to easily acquire and change targets within fractions of a second.

Ceros 200 Baseline

Ceros 200 CWI

Ceros 200 Stealth


CEROS 200 uses advanced multi-hypothesis interacting multiple model (IMM) filters to provide optimal tracking of any target.


The stealth version is specially designed for ships optimised for low radar cross-section. It uses a combination of techniques: flat, inclined metallic surfaces, a frequency-selective surface in front of the antenna, and radar-absorbing material. The result is a very low radar cross-section over a multi-octave frequency band. This enables the fire-control director to be mounted above deck even on board the most extreme stealth vessels.


CHASE is a patented method for processing the complex radar target-return signal from a very low-flying target, e.g. a sea skimmer, and its image below the sea surface. A prerequisite for the CHASE algorithm is the very wide RF bandwidth of the tracking radar.

The method has been thoroughly tested in all sea conditions against a missile-like towed target with a built-in altimeter to allow controlled flight at altitudes between 6 and 50 metres. The result of a typical test run is shown in the diagram below. CHASE radar tracking is the red curve and true altitude is shown in green.

The conclusion of the extensive test period is: The radar tracking accuracy of the CHASE method against sea-skimmer targets is better than 0.2 mrad in calm sea and better than 0.4 mrad in rough sea.

In use

CEROS 200 represents over 200 installations worldwide, including:

  • The Visby-class corvettes
  • The ANZAC frigates
  • The Skjold-class fast patrol boats
  • The Al Bushra-class fast patrol boats
  • The Iver Huitfeldt and Absalon frigates

Technical specification

Tracking radar  
Frequency range Ku-band, 15.5–17.5 GHz
Pulse compression Frequency-coded
Type Cassegrain with multimode feed
Gain 41 dB
Beam width 1.5º
Type Grid-pulsed helix TWT
Output power 1.5 kW peak, 4% duty cycle
Number of frequencies More than 100
Transmit patterns ("Pulse Doppler": 32-pulse batches)
(’MTI’:4-pulse batches, ("Frequency 
agility": pulse-to-pulse frequency agility)
Type 3-channel amplitude monopulse
digital processing
Compressed pulse width 0.2 µs in all modes

TV camera  
Type CCD sensor
Output Colour or B/W
Field-of-view 1 to 2 fixed FOVs
IR thermal imager  
Type Third generation
Wavelength band 3–5 µm or 8–12 µm
Laser rangefinder  
Type OPO-shifted Nd-YAG
Wavelength 1.57 µm (eye-safe)
Director pedestal  
Type 2-axis, elevation over azimuth
Angular speed 2 rad/s
Angular acceleration 10 rad/s2
Dimension and weight  
Height above deck approx 2 metres
Diameter approx 1.6 metres
Weight 625–750 kg depending on version


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Saab provides a range of defence systems designed to meet the challenges of the naval battle space. Our offering includes systems for anti-surface- warfare, anti-submarine-warfare and mine counter-measures operations.

Since more than 90 per cent of global trade is carried by sea, securing operations in the maritime environment poses greater challenges than ever. With Saab as your partner you will have access to a large number of systems enabling higher security and more efficient operations. What is more, you will be able to draw upon our vast experience of systems integration.

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