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Jicamarca Radio Observatory

1961 establishments in PeruAstronomy in PeruBuildings and structures completed in 1961Radio telescopesTourist attractions in the Department of Lima
Vague or ambiguous time from August 2016
Jro array
Jro array

The Jicamarca Radio Observatory (JRO) is the equatorial anchor of the Western Hemisphere chain of Incoherent Scatter Radar (ISR) observatories extending from Lima, Peru to Søndre Strømfjord, Greenland. JRO is the premier scientific facility in the world for studying the equatorial ionosphere. The observatory is about half an hour drive inland (east) from Lima and 10 km from the Central Highway (11°57′05″S 76°52′27.5″W, 520 meters ASL). The magnetic dip angle is about 1°, and varies slightly with altitude and year. The radar can accurately determine the direction of the Earth's magnetic field (B) and can be pointed perpendicular to B at altitudes throughout the ionosphere. The study of the equatorial ionosphere is rapidly becoming a mature field due, in large part, to the contributions made by JRO in radio science. JRO's main antenna is the largest of all the incoherent scatter radars in the world. The main antenna is a cross-polarized square array composed of 18,432 half-wavelength dipoles occupying an area of approximately 300m x 300m. The main research areas of the observatories are: the stable equatorial ionosphere, ionospheric field aligned irregularities, the dynamics of the equatorial neutral atmosphere and meteor physics. The observatory is a facility of the Instituto Geofísico del Perú operated with support from the US National Science Foundation Cooperative Agreements through Cornell University.

Excerpt from the Wikipedia article Jicamarca Radio Observatory (License: CC BY-SA 3.0, Authors, Images).

Jicamarca Radio Observatory
Avenida Central, Lurigancho

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Geographical coordinates (GPS)

Latitude Longitude
N -11.95139 ° E -76.87431 °
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Address

Radio Observatorio de Jicamarca

Avenida Central
Lurigancho
Lima, Peru
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Phone number
Instituto Geofísico del Perú

call+5113172313

Website
jro.igp.gob.pe

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linkWikiData (Q9065640)
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Jro array
Jro array
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Nearby Places

Cajamarquilla
Cajamarquilla

The Cajamarquilla archaeological site is located 25 km inland from the coastal city of Lima, Peru; in the Jicamarca Valley, 6 km north of the Rímac River. It occupies an area of approximately 167 ha, making it one of the largest archaeological monuments in the country. The site itself is now surrounded by several small villages which are encroaching upon, and threatening, its largely unfenced perimeter - despite its nationally 'protected' status. Cajamarquilla is an 'adobe' city, which served as an important trading center during the height of the Lima culture. It was occupied throughout the first millennium of the current era, but climate change and natural disasters (e.g. earthquakes) eventually led to its abandonment several hundred years before the Spanish conquest. Situated in a then fertile valley on a major trade route between the 'altiplano' region of the high Andes and the coastal communities of the Pacific coast, Cajamarquilla became a sophisticated center for culture, religion, and commerce. At the site, it is possible to observe the remains of temple-pyramids, wide streets, ceremonial squares, cemeteries, underground grain silos, canals, and numerous other enclosures and buildings; many of unidentified use — all constructed using 'tapial' methods (i.e. mud brick and plaster). A mummy that is approximately 800 years old that is believed to be of pre inca cultures was found on the site in November 2021 by a team of archeologists of the National University of San Marcos. Researchers reported that the mummy was tied with strings, covering his face with his hands, so they assumed it was a southern Peruvian funeral custom. In February 2022, archaeologists announced the discovery of six mummified children thought to have been sacrificed, probably to accompany a dead elite man to the afterlife. According to archaeologist Pieter Van Dalen, 1,000-1,200 years old mummies were probably relatives and placed one above the other in different parts of the tomb.