LOFAR the Low frequency Array is a next-generation electronically steered phased array radio telescope. LOFAR's capabilities are revolutionising the astronomical capabilities in the 10-240 MHz range.
These web pages describe the general signal path, major observing modes and their post processing options from the perspective of the potential user.
A more detailed description of the LOFAR array can be found in van Haarlem et al (PDF) (link to be added when paper is submitted)
For further information you can contact the sciencesupport [at] astron [dot] nl (Science Support Group).