Prince Albert Radar Laboratory
The Prince Albert Radar Laboratory (PARL) was a radar research facility operated by the  Defence Research Telecommunications Establishment (DRTE), part of the Canadian Defence Research Board. Its primary purpose was to test long-range radio propagation and radar techniques in the presence of the aurora borealis. This was part of a greater ABM effort being carried out in concert with the United States Air Force, and PARL operated along with two similar instruments at the Rome Air Development Centre and MIT Lincoln Laboratory. The site continues to operate today, used as a satellite downlink station known as the Prince Albert Satellite Station (PASS). The original study that led to PARL came about as the side effect of questions about the effects of the aurora on radar systems.