The installation of the 12-meter VGOS antenna at KPGO began on September 1, 2015; the VGOS signal chain was installed in January 2016. Development and construction of the VGOS antenna at KPGO was documented in the SGP website’s KPGO blog. In February 2016, the world’s first 3-way broadband VLBI measurement between KPGO, GGAO, and Westford occurred. It was also the first long baseline broadband VLBI measurement, demonstrating the viability of the next-generation antenna for improving determination of the Terrestrial Reference Frame and Earth Orientation Parameters. The three antennas can now routinely observe in broadband continuously for 24 hours.

20-meter Antenna

The 20-meter antenna at KPGO has been contributing to global VLBI experiments since 1993. This antenna is currently configured to observe with the legacy S-band and X-band receivers that are operational at VLBI geodetic sites worldwide but can also form baselines with the new broadband systems under a "mixed-mode" configuration that makes the broadband and the legacy S/X networks compatible. It regularly participates in international VLBI 24-hour observing sessions, and it is one of the two main stations for the weekday one-hour INT01 sessions, as well a backup for weekend INT02 sessions. The 20-meter telescope has observed in VLBI sessions since the 1993 NEOS-A6 experiment.