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Other Incoherent Scatter Radars

There are a number of other incoherent scatter radars around the world.
Søndre Strømfjord
Just north of the Arctic Circle and 100 km inland from the west coast of Greenland lies a research facility dedicated to studying the polar upper atmosphere. For historical reasons, this research station is known around the world as the Sondrestrom Upper Atmospheric Research Facility in Kangerlussuaq, Greenland. The facility is operated by SRI International in Menlo Park, California, under the auspices of the U.S. National Science Foundation and in joint cooperation with Denmark's Meteorological Institute. The facility has been operating in Greenland since 1983 and continues to be in high demand by the scientific communities.
Arecibo Observatory
The Arecibo 305-m radio telescope is the largest single-dish radio telescope on our planet, and is available to the global scientific community for astronomical observations at wavelengths between 6 m and 3 cm (frequencies of 47 MHz - 10 GHz).
Millstone Hill
The current status of Millstone Hill as a broad-based observatory capable of addressing a wide range of atmospheric science investigations has evolved over the past two decades in keeping with community recommendations and support.
Jicamarca Radio Observatory
The Jicamarca Radio Observatory is the equatorial anchor of the Western Hemisphere chain of incoherent scatter radar (ISR) observatories extending from Lima, Perú, to Søndre Strømfjord, Greenland. It is part of the Geophysical Institute of Peru (Instituto Geofísico del Perú, or IGP) and receives the majority of its financial support from the National Science Foundation of the U.S. through a Cooperative Agreement with Cornell University. The Observatory is the premier scientific facility in the world for studying the equatorial ionosphere. It has a 2-MW transmitter and a main antenna with 18,432 dipoles covering an area of nearly 85,000 square meters.
MU Radar
The MU (Middle and Upper atmosphere) radar was constructed by Radio Atmospheric Science Center of Kyoto University at Shigaraki, Shiga prefecture, Japan (34.85deg N, 136.11deg E) in 1984 mainly for the purpose of investigating atmospheric and plasma dynamics in the wide region from the troposphere to the ionosphere. The radar is a powerful monostatic pulse Doppler radar operating at 46.5MHz with an active phased array antenna, which consists of 475 crossed Yagi antennas and identical number of solid-state transmit/receive modules. This design realized a very fast beam steerability.