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Catalogue description Ordnance Survey: Directorate of Field Survey: Cambridge Radio Telescope Observations
| Reference: | OS 18 |
|---|---|
| Title: | Ordnance Survey: Directorate of Field Survey: Cambridge Radio Telescope Observations |
| Description: |
This series contains fieldwork documents and astronomical observations made in connection with the construction of the Cambridge Radio Telescope, and calculations for the alignment of ten survey marks, the azimuth of the line and the separation between the spheroid and the geoid prepared by the Ordnance Survey for the project. |
| Date: | 1969-1970 |
| Held by: | The National Archives, Kew |
| Legal status: | Public Record(s) |
| Language: | English |
| Physical description: | 38 file(s) |
| Access conditions: | Subject to 30 year closure unless otherwise stated |
| Publication note: |
Full details are given in Ordnance Survey Professional Papers (New Series) no 27. |
| Administrative / biographical background: |
The Cambridge Radio Telescope was built for the Cavendish Laboratory and opened in October 1972. The project was undertaken by the United Kingdom Atomic Energy Authority for the Science Research Council and cost £2.1m to build. The purpose of the telescope is to gain more understanding of the physical mechanisms occurring in radio sources in and beyond the galaxy. The axis for the instrument, which occupies a site five kilometres long just to the west of the city, was determined by a precise survey with a first order precision theodolite in order to locate it, with comparable or better accuracy, in relation to the positions of the fundamental stars. It involved geodetic levelling and making a series of astronomical observations from the tops of steel towers ten metres high, in order to determine the precise latitude, longitude and azimuth of the instrument, and measurement of the serration of the aerials along the base line. |
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