From JPL-Caltech: “Europa Clipper High-Gain Antenna Undergoes Testing”

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From JPL-Caltech

April 1, 2019

Gretchen McCartney
Jet Propulsion Laboratory, Pasadena, Calif.
818-393-6215
gretchen.p.mccartney@jpl.nasa.gov

JoAnna Wendel
NASA Headquarters, Washington
202-358-1003
joanna.r.wendel@nasa.gov

Written by Joe Atkinson
NASA Langley Research Center, Hampton, Va.
757-864-5644
joseph.s.atkinson@nasa.gov

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A full-scale prototype of the high-gain antenna on NASA’s Europa Clipper spacecraft is undergoing testing in the Experimental Test Range at NASA’s Langley Research Center in Hampton, Virginia. Credit: NASA/Langley

It probably goes without saying, but this isn’t your everyday satellite dish.

In fact, it’s not a satellite dish at all. It’s a high-gain antenna (HGA), and a future version of it will send and receive signals to and from Earth from a looping orbit around Jupiter.

The antenna will take that long journey aboard NASA’s Europa Clipper, a spacecraft that will conduct detailed reconnaissance of Jupiter’s moon Europa to see whether the icy orb could harbor conditions suitable for life.

NASA/Europa Clipper annotated

Scientists believe there’s a massive salty ocean beneath Europa’s icy surface. The antenna will beam back high-resolution images and scientific data from Europa Clipper’s cameras and science instruments.

The full-scale prototype antenna, which at 10 feet (3 meters) tall is the same height as a standard basketball hoop, is in the Experimental Test Range (ETR) at NASA’s Langley Research Center in Hampton, Virginia. Researchers from NASA’s Jet Propulsion Laboratory in Pasadena, California, the Johns Hopkins University Applied Physics Laboratory in Laurel, Maryland, and Langley are testing the prototype in the ETR in order to assess its performance and demonstrate the high pointing accuracies required for the Europa Clipper mission.

The ETR is an indoor electromagnetic test facility that allows researchers to characterize transmitters, receivers, antennas and other electromagnetic components and subsystems in a scientifically controlled environment.

“Several years ago we scoured the country to find a facility that was capable of making the difficult measurements that would be required on the HGA and found that the ETR clearly was it,”said Thomas Magner, assistant project manager for Europa Clipper at the Applied Physics Laboratory. “The measurements that will be performed in the ETR will demonstrate that the Europa Clipper mission can get a large volume of scientific data back to Earth and ultimately determine the habitability of Europa.”

Tests on this prototype antenna are scheduled to wrap up soon; however, researchers plan to return to the ETR in 2020 to conduct additional tests on Europa Clipper’s high-gain antenna flight article. Europa Clipper plans to launch in the 2020s, with travel time to Jupiter taking three to seven years (depending on the launch vehicle and which planetary alignments can be utilized).

JPL manages the Europa Clipper mission for NASA’s Science Mission Directorate. The multiple-flyby concept was developed in partnership with the Applied Physics Laboratory.

See the full article here .


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Jet Propulsion Laboratory (JPL)) is a federally funded research and development center and NASA field center located in the San Gabriel Valley area of Los Angeles County, California, United States. Although the facility has a Pasadena postal address, it is actually headquartered in the city of La Cañada Flintridge, on the northwest border of Pasadena. JPL is managed by the nearby California Institute of Technology (Caltech) for the National Aeronautics and Space Administration. The Laboratory’s primary function is the construction and operation of robotic planetary spacecraft, though it also conducts Earth-orbit and astronomy missions. It is also responsible for operating NASA’s Deep Space Network.

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