However the GWEC expects that to rebound to 47GW in 2014, led by China, the US and record installations in Canada and Brazil.
The Emmy-winning filmmakers - Donna Campbell and Georgann Eubanks of Minnow Media - were on hand to record the installation as part of their new documentary on Sayre's life and works.
There will also be what Tate Modern director Chris Dercon calls "rediscoveries", including an installation recording a participatory feminist work made by Suzanne Lacy in the 1980s, about women's experience of ageing.
In the gallery's lower level, the composer and jazz musician Neil Leonard, with whom Ms. Campos-Pons collaborated in Venice and to whom she is married, has a haunting video installation recording the daily rounds and chantlike calls of street vendors in Havana.
It does this through the analysis of medical interventions including the wartime dramas of Florence Nightingale and Mary Seacole, the birth of psychiatry as a response to shellshock in the first world war, and through David Cotterrell's installation, recording how surgical teams operate behind the lines in Afghanistan.
So it was with some degree of scepticism that I approached Artangel's latest installation, Recording in Progress, in which 50 people at a time can observe PJ Harvey and her band work on their latest album behind one-way glass in a soundproofed box beneath Somerset House in London.
"I was doing things like making cardboard record players, or sometimes doing binaural recording sound installations.
Her career to date (once based in Portland, Oregon, but now in LA) has involved everything from performance art (some of which has been seen at the ICA in London and the Arnolfini in Bristol), short stories, shooting a video for the band Sleater-Kinney, experimental short films, sound installations, even recording her own albums in the 1990s on the punk scene.
In 2008, Mr. Kirkegaard sold four photos of the recording sites of his installation "Aion," now at the Museum of Modern Art, to a private buyer.
The chapter emphasizes that it is a prime responsibility of the test cell manager to ensure that the installation, calibration, recording, and post-processing methods associated with the various transducers and instruments are in accordance with the maker's instructions and the user's requirements.
