ARTHUR (radar)

ARTHUR is an acronym for "Artillery Hunting Radar", is a Counter-battery radar system originally developed jointly for and in close co-operation with the Norwegian and Swedish armed forces by Ericsson Microwave Systems in both Sweden and Norway. It is also used by the British Army, under the name Mobile Artillery Monitoring Battlefield Radar, or Mobile Artillery Monitoring Battlefield Asset (MAMBA)

"MAMBA" redirects here. For the museum, see Buenos Aires Museum of Modern Art.
Artillery Hunting Radar
A Danish ARTHUR used on exercise
TypePassive electronically scanned array
Place of originSweden, Norway
Service history
In service1994–present
Used bySee Operators
WarsWar in Afghanistan, Iraq War
Production history
ManufacturerHägglunds, SAAB
Unit costSEK 27 million (1996)[1]
No. built80 (by 2020)[2]
VariantsMod A, Mod B, Mod C
Specifications
Crew4
Azimuth and Elevation Electrically Scanned
The radar on the ARTHUR
TypePassive phased array
FrequencyC (G/H)-band
Range60 kilometres (37 mi)
Precision60 m (200 ft)
Other NamesMAMBA

It is a mobile, passive electronically scanned array C-Band radar for the purpose of enemy field artillery acquisition and was developed for the primary role as the core element of a brigade or division level counter battery sensor system. The vehicle carrying the radar was originally a Bandvagn 206 developed and produced by Hägglunds, but is now more often delivered on trucks with ISO fasteners.

The radar is now developed by SAAB Electronic Defence Systems (after EMW was sold to SAAB in June 2006) and Saab Technologies Norway AS.

Role

The ARTHUR detects hostile artillery by tracking projectiles in flight. The original ARTHUR Mod A can locate guns at 15 - 20 km and 120 mm mortars at 30 - 35 km with a circular error probable of 0.45% of range. This is accurate enough for effective counter-battery fire by friendly artillery batteries. ARTHUR can operate as a stand-alone, medium-range weapons locating radar or a long-range weapon locating system, consisting of two to four radars working in coordination. This flexibility enables the system to maintain a constant surveillance of an area of interest.

The upgraded ARTHUR Mod B meets the British Army's MAMBA requirement for locating guns, mortars or rockets. It can locate guns at 20 - 25 km and 120 mm mortars at 35 - 40 km with a circular probable error of 0.35% of range. MAMBA was successfully used by the British Army in Iraq and Afghanistan, with an availability of 90%.[2]

ARTHUR Mod C has a larger antenna and can detect guns at 31 km, mortars at 55 km and rockets at 50 - 60 km depending on their size, and locate targets at a rate of 100 per minute with CEP 0.2% of range for guns and rockets and 0.1% for mortars.[2]

It can be carried by a C-130 or slung under a heavy lift helicopter such as a Chinook. Its air mobility allows it for use by light and rapid reaction forces such as airborne and marine units.

Nordic Battle Group

The use of the ARTHUR in Nordic Battle Groups will primarily concentrate on preventing the use of artillery barrages in civilian areas, since the radar can identify an artillery unit guilty of targeting civilians. It will also be used to warn friendly mission troops of incoming indirect fire.[3]

Operational Modes
Mobile Artillery Monitoring Battlefield Radar in Al Amarah, Iraq being used by K Battery 5th Regiment Royal Artillery (RA). Shown placed in a BV-206 vehicle.

ARTHUR can be operated in two main modes: Weapon locating and Fire direction. Weapon locating is used to determine the location of the guns, mortars or rocket launchers that fired and their target area. Fire direction is used to adjust the fire of own artillery onto target coordinates.

Weapon Locating

When locating enemy artillery, the radar tracks the up-going trajectory of shells, calculates their points of origin and impact and, with other information, displays it to the radar operator(s). Depending on national tactics, techniques, procedures, the commander's orders and the situation, this information may be used to alert any troops in the impact area and engage the hostile batteries with counter-battery fire. If the users have digital communications networks these messages may be sent automatically.

The ARTHUR can determine whether the artillery piece is of artillery-type, rocket-type or mortar-type based upon the curve of the trajectory, the munition's speed, and its range.

Fire Direction

When in Fire direction mode the radar calculates the expected impact location of the friendly fire. From this corrections are calculated and reported to hit the target coordinates.

Sweden also uses the radar for 'fall of shot' calibration.

Threats

Radars are easy to detect and locate if the enemy has the necessary ELINT/ESM capability. The consequences of this detection are likely to be attack by artillery fire or aircraft (including anti-radiation missiles) or ECM. In other circumstances ground attack with direct fire or short range indirect fire are the main threat. The usual measures against the first are using a radar horizon to screen from ground-based detection, minimising transmission time, deploying radars singly and moving frequently. Swedish ARTHUR units usually operate in groups of three that guard the immediate surroundings.

Operators
Map with ARTHUR radar operators in blue

Current operators

See also

References
  1. "ARTHUR - Artillery Hunting Radar on BV206". one35th.com. Archived from the original on 17 May 2011. Retrieved 16 March 2016.
  2. Dalløkken, Per Erlien (11 March 2020). "17 år etter Irak: Britene ruster opp sine norsk-svenske artillerijegere". Tu.no (in Norwegian). Teknisk Ukeblad.
  3. "ISTAR och artillerilokaliseringsradarn ARTHUR" (in Swedish). Swedish Armed Forces. Archived from the original on 27 September 2007. Retrieved 17 January 2007.
  4. "IDE and Saab team up to support the Hellenic Army's ARTHUR systems". Army Technology. Archived from the original on 6 August 2016. Retrieved 6 July 2016.
  5. "Saab Sells the ARTHUR Radar System to Italy". Defence Aerospace. Archived from the original on 15 September 2016. Retrieved 6 July 2016.
  6. "Artillery Radar System ARTHUR". Ministry of Defence & Armed Forces of the Czech Republic. Archived from the original on 17 July 2011. Retrieved 6 July 2016.
  7. "Saab receives order for weapon locating system" Archived 2011-07-15 at the Wayback Machine, accessed February 28 2011
  8. "Arthur Weapon Locating System - In use" Archived July 15, 2011, at the Wayback Machine, "Saab official ARTHUR website. In use", accessed February 28th 2011
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