This " secondary " return now gives its name to secondary radar, which forms the basis of most civilian radar systems.
12.
According to DiPalmo, the secondary radar was lost for at least two sweeps, or 24 seconds, and possibly 3, or 36 seconds.
13.
But Thursday night the system failed so fast that the controllers had no opportunity to act, and they lost primary and secondary radar.
14.
The secondary radar system SSR750 as part of the joint military civil functionality could interrogate a transponder on board as aircraft for the height.
15.
Each primary radar had an associated secondary radar ( IFF ), SSR 750, with the smaller secondary radar mounted on the main primary radar aerial.
16.
Each primary radar had an associated secondary radar ( IFF ), SSR 750, with the smaller secondary radar mounted on the main primary radar aerial.
17.
They employ a phased array antenna, which reduces the appearance of side lobes by more than 50 %, thus reducing vulnerability to anti-radar missiles and a secondary radar.
18.
Of the six secondary radar stations supplying the two air traffic control centres in Auckland and Christchurch with aircraft position data, Cass Peak is the southernmost in New Zealand.
19.
At 16 : 59 : 50, about three minutes after the collision, Amazonic Center started to receive the Embraer's secondary radar reply, with its correct altitude and last assigned code.
20.
The received signals from both the primary and secondary radars were passed for processing from the Type 84 Radar building to the main technical building for a Linesman site-the R12 building.
