Goldstone Radar

Goldstone Deep Space Communications Complex

The 70m antenna at Goldstone
Organization	California Institute of Technology Jet Propulsion Laboratory National Aeronautics and Space Administration
Observatory code	252, 253, 257
Location	Mojave Desert, California
Coordinates	35°25′36″N 116°53′24″W / 35.426666666667°N 116.89°W / 35.426666666667; -116.89Coordinates: 35°25′36″N 116°53′24″W / 35.426666666667°N 116.89°W / 35.426666666667; -116.89
Altitude	2,950 ft (900 m)
Established	1958
Website	www.gdscc.nasa.gov
Telescopes	DSS 14
Location of Goldstone Deep Space Communications Complex
Pioneer Deep Space Station
U.S. National Register of Historic Places
U.S. National Historic Landmark
Location	Goldstone Deep Space Communications Complex, Fort Irwin, California, United States
Coordinates	35°23′21.41″N 116°51′22.31″W / 35.3892806°N 116.8561972°W / 35.3892806; -116.8561972
Area	less than 1 acre (0.40 ha)
Built	1958
Architect	U.S. Army
NRHP reference #	85002813
Significant dates
Added to NRHP	October 3, 1985
Designated NHL	October 3, 1985
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The Goldstone Deep Space Communications Complex (GDSCC), commonly called the Goldstone Observatory, is located in the Mojave Desert near Barstow in the U.S. state of California. Operated by the US NASA's Jet Propulsion Laboratory, its main purpose is to track and communicate with space missions. It is named after Goldstone, California, a nearby gold-mining ghost town.

The complex includes the Pioneer Deep Space Station, which is a U.S. National Historic Landmark. The current communications complex is one of three in the NASA Deep Space Network, the others being the Madrid Deep Space Communications Complex and the Canberra Deep Space Communication Complex.

Five large parabolic ("dish") antennas are located at the Goldstone site to handle the workload, since at any given time the DSN is responsible for maintaining communication with up to 30 spacecraft. The antennas function similarly to a home satellite dish. However, since the spacecraft they communicate with are much further away than the communication satellites which home satellite dishes use, the signals received are much weaker, requiring a larger aperture antenna to gather enough radio energy to make them intelligible. The largest, a 70-meter (230 ft) Cassegrain antenna, is used for communication with space missions to the outer planets, such as the Voyager spacecraft, at 20 billion kilometers the most distant manmade object from Earth. The radio frequencies used for spacecraft communication are in the microwave part of the radio spectrum; S band (2.29 - 2.30 GHz), X band (8.40 - 8.50 GHz) and the Ka band (31.8 - 32.3 GHz). In addition to receiving radio signals from the spacecraft (called downlink signals), the antennas transmit commands to the spacecraft (called uplink signals) with high power radio transmitters powered by klystron tubes.