C4iSR: Air

Indo Defence 2018: PT Len unveils locally developed air surveillance radar

09 November 2018

Key Points

  • Indonesia is showcasing a locally developed air surveillance radar for the first time
  • The system is undergoing further validations on an island near the country's maritime boundary

PT Len’s air surveillance radar unit, on display to the public for the first time at Indo Defence 2018. (IHS Markit/Ridzwan Rahmat)PT Len's air surveillance radar unit, on display to the public for the first time at Indo Defence 2018. (IHS Markit/Ridzwan Rahmat)

Indonesia's state-owned defence electronics company PT Len has unveiled a locally developed solid-state air surveillance radar.

Initial tests of the system were completed on 31 October and the equipment is being showcased to the public for the first time at the Indo Defence 2018 exhibition in Jakarta, a company representative told Jane's at the event.

"During its initial tests, which were conducted near our office in Bandung, we ran it at a fraction of its power capacity and we managed to detect aerial contacts at ranges of up to 15 km," said a PT Len representative from the company's Center for Technology and Innovation Division.

"Should the system run on its full-power capacity, it will have a range of about 200 km," he said, adding that full-power trials are scheduled to be conducted on another evaluation unit that has been deployed on Pulau Nipa, a small island that lies close to the maritime border with Singapore.

PT Len's air surveillance radar operates on the S-band, and features a rotating cosecant squared pattern antenna that can operate at 6, 10, 12, or 20 rotations per minute (rpm). The system incorporates an identification friend-or-foe (IFF) system that can interrogate contacts in Modes 1 to 4 for military aircraft, and Modes A and C for civilian aircraft.

Tracking of targets is achieved with monopulse signals and an inbuilt pulse compression feature improves the system's low probability of interception (LPI) functions. The radar incorporates a constant false alarm rate (CFAR), and moving target indicator (MTI) algorithms to aid in the accuracy of target detection.

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