Yak-130 series

I have noticed the Yak-130 series machine has reshaped nose cone apparently housing a radar antenna of some kind..

Is this still the first Yak-130 prototype or is this another airframe?
Any idea which radar is being mounted there? NIIP OSA could be the one?

http://perso.wanadoo.fr/cool.pix/yak-130.htm

Flex