December 10, 2015 Early in the development process of the KPGO station, the team identified several accessibility and safety issues associated with the planned installation of the front end positioner. The primary issue related to the confined space in the hub and lessons learned from the vertical installation of the GGAO front end positioner. The team came up with a great solution for installing the positioner in a horizontal position that is much safer for the personnel than the originally planed vertical installation. The payload drive system (in blue) can be serviced in the hub maintenance position The primary service panel allows access to payload interface and the secondary vacuum port and the LNA bias supplies, electronics tray and calibrator that are accessible and removable In the secondary service panel the turbo pump, vacuum valve, vacuum gauge and the DAQ cards are removable, the calibrator and payload interface are accessible Goddard review team members get an explanation of the serviceability of the hub electronics box at Haystack Observatory in July 2015. Model based description of installing the signal chain rails inside the hub for the frontend payload positioning system
