Dubbed the Commercial Orbital Transportation Services (COTS) Ultra High Frequency (UHF) Communication Unit, the new system will allow ISS crew members to monitor and command approaching or departing Dragon spacecraft during cargo delivery missions to the orbiting laboratory.
Astronaut Jeff Williams, Expedition 22 Commander (top), aboard the International Space Station, and engineers at SpaceX Mission Control in Hawthorne, California, perform activation and testing of SpaceX's new communications system for operations with upcoming Dragon spacecraft resupply missions to the ISS. Photo: Roger Gilbertson/SpaceX)
On March 11, SpaceX and NASA Houston performed an additional series of tests, using the new system to send communications between the ISS and the NASA Dryden ground station. This provided a baseline of the radio frequency performance and confirmed the first set of antennas performed as expected and is ready for mission operations. Additional testing is expected for a second set of antennas as well as ongoing verification of the overall system.
The tests employed live video and telemetry links from the ISS to verify the hardware's functionality, broadcast and reception signal strengths, and the system's stability over long-duration operations.
“The success of this series of tests speaks to our close collaboration with NASA as well as the SpaceX process that allowed the rapid development of this new hardware,” said Marco Villa, SpaceX Mission Operations Manager. “Furthermore, the January tests marked the first official joint operations between SpaceX Mission Control in California, and NASA Mission Control in Houston. Everything went smoothly, and we eagerly anticipate the upcoming Dragon visits to the ISS.”
Developed by SpaceX under a NASA Space Act Agreement, the new system allows for communication between the ISS and SpaceX's Dragon spacecraft while in the vicinity of the ISS. Its design leverages the abilities of the ISS communication systems, providing data exchange with ground-based mission control.
Designed from the beginning to transport crew, SpaceX’s Falcon 9 and Dragon spacecraft were selected by NASA to transport cargo to and from the ISS starting in 2011. The $1.6B contract represents 12 flights for a minimum of 20 tons to and from the ISS. The first demonstration flights under the COTS program are scheduled for 2010, following the inaugural launch of SpaceX’s Falcon 9 rocket.
About SpaceX
SpaceX is developing a family of launch vehicles and spacecraft intended to increase the reliability and reduce the cost of both manned and unmanned space transportation, ultimately by a factor of ten. With theFalcon 1 and Falcon 9 vehicles, SpaceX offers highly reliable/cost-efficient launch capabilities for spacecraft insertion into any orbital altitude and inclination. Starting in 2010, SpaceX's Dragon spacecraft will provide Earth-to-LEO transport of pressurized and unpressurized cargo, including resupply to the International Space Station.
Founded in 2002, SpaceX is a private company owned by management and employees, with minority investments from Founders Fund and Draper Fisher Jurvetson. The SpaceX team now numbers more than 900, with corporate headquarters in Hawthorne, California. For more information, please visit the company's web site at www.spacex.com.
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