The United States and Spain agreed to the construction and operation of a $1.5 million space tracking and data acquisition station about 48 kilometers (30 miles) west of Madrid, Spain. Linked with the NASA Deep Space Instrumentation Facility, the station included a 26-meter (85-foot)-diameter parabolic antenna and equipment for transmitting, receiving, recording, data handling, and communications with the spacecraft.

Spanish firms would construct the storage and other support structures, and Spanish technicians would participate in operating the station. Later, unified S-band equipment was added to join the facility with the Manned Space Flight Network to support the Apollo program.