The European Space Agency (ESA) has been continuously trying to active a set of commands that could help Philae to wake up and re-commence its scientific measures. Philae lander after landing on comet 67P/Churyumov- Gerasimenko in November unexpectedly bounced into a shadow and lost contact.

It has been told that until July 24, Rosetta will orbit a path that might allow it to contact the lander and then it will fly over the southern hemisphere of the comet to observe it with its own 11 instruments.

The agency told that despite the loss, the orbiter has tried to collect as much information as possible about the comet as it nears its closest encounter with the Sun, known as perihelion.

Stephan Ulamec, a scientist with the German Aerospace Agency and project manager for the Philae lander, said, "Philae is obviously still functional, because it sends us data, even if it does so at irregular intervals and at surprising times".

The Philae went into deep sleep as it could not get sufficient sunlight that was needed to work on 67P/Churyumov- Gerasimenko and after months; it again started its work.

ESA said in a statement that after landing on comet 67P/Churyumov-Gerasimenko in November, Philae suddenly bounced into a shadow cast either by a crater or outcropping.

According to Ulamec still they have enough time to reconnect with the lander before the comet gets too far from the sun and conditions get too dark, in September or October.

One of the lander's two transmission units may not be working and they already know one of those units is damaged, said Ulamec.

Mission controllers have sent a 'blind command' to the probe commanding it to use its only functional transmitter if one of them is faulty.