Kalkan-100G=MAR
Kalkan-200G=MAR II (MAR Mk2)
Kalkan I
Kalkan II
Kalkan-400G= Kalkan-4TWTA (Travelling Wave Tube Amplifier)
Kalkan radars use traveling wave tube amplifiers. Kalkan-400G has national traveling wave tube amplifiers(Project Seyyah) with improved performance. The high-voltage power supply of the national TWTA has also been nationalized (Project Kudret). BNcool delivers the cooling solution.
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Kalkan I became Kalkan II, and Kalkan II will become Kalkan-400G. Aselsan stopped producing Kalkan I and will stop producing Kalkan II by the end of this year and will offer Kalkan-400G to customers for their radar needs in the class of AN/MPQ-64. Kalkan Is and IIs can be upgraded to Kalkan-400G.
Kalkan-II has a better range (>120 vs >100km), a better range against 1^m RCS targets (up to 80km vs up to 60 km), and can track more targets simultaneously(>100 vs >60) compared to Kalkan I. Kalkan-400G will be a further improvement.