The signal chain development team at MIT Haystack Observatory hosted and passed system integration and pre-shipment reviews in Westford, Massachusetts, on December 15th and 16th. Integration and testing of all signal chain subsystems were reviewed including the recently completed system noise temperature tests on the frontend components, the zero-baseline tests between the KPGO backend temporarily located at the Westford site and the complete Westford system, and the plans for continuing testing the cable delay measurement system at Westford after the frontend and backend are shipped to KPGO.

Reviewing also included the horizontal installation of the frontend positioner (FEP) hardware into the 12-meter antenna feed cone. This procedure was re-engineered (described in the December 10 post) because of differences in the antenna hub from the prototype 12-meter antenna and FEP at GGAO. The end result, which is a much safer procedure, uses a trolley that minimizes the confined space and fall hazards with the VGOS stations, and makes the hub a more comfortable working environment.

The removable support hardware sled with post-dewar electronics is in the foreground of this photo taken of the complete frontend payload. Cryogenic coolant cables and components are accessed from the other side.