This time-lapse movie shows the process of removing the old Very Large Array (VLA) feedhorns and their surrounding structures and installing the new equipment to transform the antenna into an Expanded Very Large Array (EVLA) antenna. This work took place in the Antenna Assembly Building at the VLA site, 50 miles west of Socorro, NM. The work shown in this time-lapse movie occurred over a period of approximately two months.
One of the big improvements that the EVLA will offer to the research community is greatly expanded frequency coverage. The current VLA covers only about 25 percent of the frequencies in the range of 1-50 GHz, but the EVLA will cover that entire range. To expand the frequency coverage, the original VLA antennas must undergo an extensive overhaul to fit in additional feedhorns and receivers in the area around the center of the main reflector dish. The physical configuration of the antenna's vertex room, which houses the receivers, and the structure that houses the feedhorns is changed completely in this overhaul.