Interplanetary Scintillation Array

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Interplanetary Scintillation Array
Cmglee Cambridge MRAO IPS Array.jpg
Observatory Mullard Radio Astronomy Observatory Edit this on Wikidata
Location(s) Cambridge, United Kingdom Edit this at Wikidata
Coordinates 52°09′47″N 0°02′04″E / 52.16315°N 0.034354°E / 52.16315; 0.034354Coordinates: 52°09′47″N 0°02′04″E / 52.16315°N 0.034354°E / 52.16315; 0.034354 Edit this at Wikidata
Organization Mullard Radio Astronomy Observatory Edit this on Wikidata
Telescope style Radio telescope Edit this on Wikidata
Interplanetary Scintillation Array is located in the United Kingdom
Interplanetary Scintillation Array
Location of Interplanetary Scintillation Array

The Interplanetary Scintillation Array (also known as the IPS Array or Pulsar Array) is a radio telescope that was built in 1967 at the Mullard Radio Astronomy Observatory, in Cambridge, United Kingdom, and was operated by the Cavendish Astrophysics Group. The instrument originally covered 4 acres (16,000 m²). It was enlarged to 9 acres in 1978, and was re-furbished in 1989.

The array operates at a radio frequency of 81.5 MHz (3.7 m wavelength), and is made up of 4,096 dipole antennas in a phased array. Using 14 beams, it can map the northern sky in one day. The observatory's staff uses sheep to keep grass away from the antennas because a lawn mower cannot not fit in the spaces.

Antony Hewish designed the IPS Array to measure the high-frequency fluctuations of radio sources, originally for monitoring interplanetary scintillation. Hewish received a Nobel prize after the high time-resolution of the array allowed the detection of pulsars by Jocelyn Bell in 1967.[1]

The IPS Array has more recently been used to track and help forecast interplanetary weather, and specifically to monitor the solar wind. It is now essentially retired, and has lost a significant fraction of its area.

References[edit]

  1. ^ "The First Pulsar". astrobites. 15 September 2017.