Target ID with simple F.E.T analogue multiplier?

[dbanner]

Would this circuit topology work for such a task. In this circuit, Vout is proportional to V1*V2. The F.E.T's conductance are matched to within+\-5%

Can the circuit can be tweaked for X and R channel inputs to give target information.

What do you think? This circuit is featured in Wireless world Circard collection 1978. All the relevant math is there.

[Altra]

I think you need some kind of division function to get a target vector. Multiplying X x R does not let you know which is greater or lesser. One of the early Tesoros used a analog multiplier IC for target ID. If you look at the datasheet these chips also had a division function that was used. Is there any text description with your circuit?.