Maintainer:
Steve Ellingson (Virginia Tech)
This page is http://www.ece.vt.edu/swe/eta/array/
Last Update: November 5, 2005 UT 1000
Specification: ETA Array Specification (PDF), S.W. Ellingson, August 21, 2005. Talks about the site plan and array geometry. As of Sep 13, a few details have changed but most is still intact.
In reverse chronological order.
First ETA antenna stand is completed! November 6, 2005 | |
Completed dipole/active balun assembly before installation on an antenna stand. November 6, 2005 | |
Attachment of the dipole arms to the top cap, shortly before being slathered in silicone to mitigate moisture penetration. November 6, 2005 | |
Note how we have been careful to select ''NSF'' hardware ;) November 5, 2005 | |
Assembling an antenna stand, which involves attaching four aluminum dipole arms and an active balun cartridge to a plastic cap. November 5, 2005 | |
Measuring cable loss by injecting a signal at the antenna stand which is measured in the electronics building. November 5, 2005 | |
Cables pulled to egress panel. Black cables are RF, white are power. November 5, 2005 | |
Slack box - space installed in-line near the outriggers to accomodate cable slack. Consists of a plastic cooler buried up to the lid, with a wooden enclosure to prevent damage from the sun and marauding lawnmowers. October 27, 2005 | |
Part of the shipment of coaxial cables from Cable X-Perts. The core array is all RG-58 (lengths on the order of 100 ft). The north outrigger is about 250 ft of RG-8X, and east outrigger is about 500 ft of LMR-400. Everything is terminated in Type-N connectors. Three coax cables run to each site: 2 polarizations plus a spare. October 11, 2005 | |
Conduit from all 12 antenna stands coming together at the west wall of Building 17. October 11, 2005 | |
Completed installation of conduit for the core array. October 11, 2005 | |
Detail of two core array conduits emerging from underground. This is 1.5-in PVC. October 11, 2005 | |
North outrigger location (PARI 12-m radome in background). No small effort to make this location flat! October 11, 2005 | |
Completed installation of conduit leading around the radome of the PARI 12-m up to the east outrigger. This run is about 500 ft end-to-end. October 11, 2005 | |
Completed installation of conduit leading to the north outrigger stand. This run is about 200 ft end-to-end. October 11, 2005 | |
The core array positions marked out with stakes, with Building 17 in the background. September 10, 2005 | |
The future site of the core array. August 31, 2005 | |
The future site of the east outrigger. (No illusion: it's on a pretty good slant.) August 31, 2005 | |
View of the West Array Area, including the core array site and Building 17, from the access road. Gives some sense of how the site is at the bottom of a natural bowl formed by the surrounding terrain. August 10, 2005 |