Wednesday, April 7, 2010

LBA field survey complete

Field preparation at the Chilbolton site has continued according to schedule. Both the LBA and HBA fields have now been cleared and the LBA field has been prepared and surveyed ready for placement and trenching. The survey positions are measured using the European Terrestrial Reference System 89 (ETRS89). Because this system is calibrated using VLBI-Geodetic measurements, it turns out that the Chilbolton 25m dish was in fact one of the contributors to the standard reference frame, which we are now using. So that's a nice local link!

As we have now completed the survey of the LBA field the coordinates have been sent to ASTRON, who will use the measurements to work out the exact positioning of the 96 aerials.

The image below shows surveying equipment at the Chilbolton LOFAR site. In the background are two heavy diggers involved with the soil clearing operations.

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