La Posta Astro-Geophysical Observatory

The La Posta Astro-Geophysical Observatory was a 60-foot-diameter (18 m) Navy Electronics Laboratory radio-telescope installation at Campo, CA, US.

Construction began in 1964 at a 3,900-foot-altitude (1,200 m) site in the Laguna Mountains, 65 miles (105 kilometers) east of San Diego.

Its 60-foot dish, which could both transmit and receive, was used for important research programs in propagation and ionospheric forecasting which were used during a number of Apollo space launches to predict solar activity that might hamper communications from the ground to the space capsules.

The large dish physically remained unused until it was dismantled in late 2015; the surrounding site is now used as a Naval Weapons Training Facility.

This article about a specific observatory, telescope or astronomical instrument in the United States is a stub.