They may also record the performance for critical analysis at a later time.
This included the ability to record data without anyone at the site.
Technology has advanced to the point where anyone can record at home.
Last month officials record a second reading at the highest level.
In 2001 the total population was recorded at 320,000 people.
In 2005 the total population was recorded at 480,000 people.
The image had been recorded at night, from ground level.
The special was recorded at the same time as the second series.
In 2007 the total population was recorded at 520,00 people.
The music was recorded at two shows in 1997 and 2002.