Ilosaarirock (also known as Transmission 10.1) is a live album by British progressive rock band Porcupine Tree, released in March 2009.

[1] It was recorded at the Ilosaarirock Festival in Finland on 14 July 2007, and is considered by the band to be one of the best concerts from the "Tour of a Blank Planet".

It includes the band's complete performance remixed from the multitrack recording made by national Finnish radio.

This was the first time that live versions of the Fear of a Blank Planet songs have been officially released.

Due to a fault with the mastering on the first manufacturing run, a corrected replacement CD was also included inside the package.