Information about cadRCS


This unique software product from Gert Albert Lindqvist ( GAL ), provides high resolution Radar Cross Section ( RCS ) calculation based on 3D CAD data.

cadRCS is an inexpensive solution if you want knowledge about the RCS of your object(s). A user-friendly GUI based graphical display enables precise identification of radar reflecting areas. It also provides mono-pulse pictures, showing where on the object a radar seeker will aim. In this way, the simulator permits continuous RCS stealth assessment of ships, aircraft and other constructions.

In other words – this software transforms complex RCS properties into a practical tool that can be operated by everyone.


The highly advanced 3D calculation technology used in this software is based on more than 30 years of experience in RCS measuring.

Comparison with actual RCS measurements reveals an exceptional accuracy. Naturally, the accuracy depends on the quality of the 3D CAD model.

Also when comparing ship measurements with calculations it is important to know the roll and pitch of the ship as this has an impact on the RCS.


The theory used in cadRCS is unique and has never been published. The theory is developed by the owner of cadRCS Gert Albert Lindqvist ( GAL ). GAL has a background in Theoretical Physics and more than 30 years of experience in RCS measurements. The theory will remain unpublished. Having a theory is like having a map of where to go. If you have got cadRCS then you can see which way the theory has brought the calculations, but you cannot see the theory.


The calculation time is dependent on the reflection profile of the object and the desired accuracy. According to several of our users, it is faster and much more accurate than all other RCS prediction tools.


cadRCS can calculate RCS of any 3D object described by a 3D CAD file.

A great advantage of having a CAD-model of the object in question is that all aspect angles can be examined – which is normally not possible if only measurement methods are applied.

Using the CAD-model together with cadRCS offers the opportunity to train the operational staff in examining different attacks, thus training them in ensuring that they are in the best situation for using decoys or other methods to improve their survivability.

cadRCS WITH Windows 10 & 11

With Windows 10 everything is 64 bit and cadRCS calculations must be accurate and were always performed in 64 bits also on the old 32-bit machines. Of course, the calculations are much faster in Windows 10, but also new features are then possible.

It is now possible to calculate on images that are up to 1024×1024 pixels in size and the maximum number of facets can be up to 5.000.000 facets.

Windows 11 

Windows 11 version of cadRCS is now under test and the free software under Windows 11 can already be downloaded here.

Issues you can't calculate with cadRCS


cadRCS cannot calculate SAR/ISAR images directly, but it can make results for input to a SAR/ISAR processor.

cadRCS is primarily designed to make the same results as a normal operational radar.


Moving target indication (MTI) – please see

cadRCS cannot calculate the speed due to the lack of input of the velocity in the input parameter setup.

MTI is often used by radars looking at moving targets as the technique gives a much better signal to noise ratio.