Today, Expedition 35 spacewalkers Vinogradov & Romanenko will deploy/retrieve scientific experiments and install a replacement navigation aid – the LRR – for ATV-4. Replacement of the LRR is set to happen between 18:00-18:30 CEST.
The Laser Radar Reflector target is used by ATV during the last part of Rendezvous operations. Previous investigations concluded that the current LRR should be replaced as it is likely contaminated.)
Watch live below. Details via NASA.
(UPDATE 20.04: You can review the complete replay of the EVA below via the archive in NASA’s uStream channel. The LRR replacement takes place at around the 1:30:00 point in this video).