"2nm radar separation is being worked on within SESAR'
Interesting statement.
I was taught that en-route and approach radar radar separation minima were different due to the technical limitations of the equipment employed in those functions.
Area radar....50cm, or 23 cm radars, refreshing at 10rpm, required a separation 'minima' of 5nm. (10nm in azimuth outside of certain ranges from the radar source).
Approach radar....10cm equipment refreshing at about 15rpm, gave a separation 'minima' of 3nm.
What new equipment are SESAR mandating/installing which will allow this proposed reduction in radar separation minima, and therefore safety?