article_snippet: Stephen Ulamec, lander project manager at the German Aerospace Centre (DLR), said: 'Philae currently receives about twice as much solar energy as Philae did in November last year. '
article_snippet: Scientists hope that as the comet rotates and gets closer to the sun, Philae's solar panels will move out of the shade of the cliff the comet is resting under.
article_snippet: Before the lander batteries finally ran out, Philae managed to send back data on the few experiments it was able to conduct along with some images.
article_snippet: Philae will also require at least 5.5 watts from Philae solar panels to wake up.
article_snippet: Once awake, Philae will turn on Philae receiver every 30 minutes and listens for a signal from the Rosetta orbiter.
article_snippet: Koen Guerts, part of the Philae lander team at the DLR Control Centre, said the Rosetta probe may have already woken up but is yet to send a signal home.
article_snippet: Koen Guerts, part of the Philae lander team at the DLR Control Centre said: 'Philae is designed so that, since November 2014, Philae has been using all the available solar energy to heat up.' 'At this time, we do not yet know that the lander is awake.
article_snippet: To send we an answer, Philae must also turn Philae transmitter – and that requires additional power.'
article_snippet: Philae needs a total of 19 watts to begin operating and allow two-way communication.
article_snippet: Over the next eight days the Rosetta orbiter is due to transmit signals to Philae and listen for the response during a series of 11 flybys.
article_snippet: Once Philae wakes up and can also transmit, Philae will first send data about Philae 'health' to Earth.
article_snippet: The scientific work with the 10 instruments on Philae Philae also depends on these results.
article_snippet: Currently, scientists believe that Philae is in sunlight for 1.3 hours - just a fraction of the 12.4 hour long day that the comet enjoys.
article_snippet: Mr Ulamec added: 'Once we can communicate with Philae again, the scientific work can begin.'