Wallops Island Antenna Assessment Trip, March 2018
By: ksterne on: Fri., Mar. 16, 2018 01:07 PM EDT (5627 Reads)The main antenna array was found to be in better condition than expected, especially after a very strong wind storm the weekend before the trip. There were a good number of reflector wires that were down across a few gaps, and maybe one missing completely. As well, there were two antenna poles that had the front guy wire broken, possibly a result of the brush clearing. As well, as can be seen in the picture, several places had wires that were disconnected from the baluns and resistor boxes. These breaks in the wires greatly impact the performance of the antenna and thus the radar.
The interferometer array was in surprisingly good condition, aside from a badly beat up poll from a piece of metal hanging from a reflector wire. There were one or two reflector wires that were down across a couple of gaps, but overall better than the main array. As well, from the ground, none of the antenna wires looked to be broken from the baluns and resistor boxes.
Prior to the trip, arrangements had been made to meet up with the Wallops contractor that would provide and operate the lifts to get to the antennas and reflector wires. The meeting went well and things should be lined up for a later trip to happen in April or May to start the first phase of repairs.
With some extra time at the site, the transmitters were tested for forward power output as well as receive signal pass through. Here a number of transmitters were found to have an issue that needs a repair. During downtime (or bad weather) of the antenna repair trips, the transmitters will be more carefully looked at and repaired.