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Vector-R launch vehicle completes suborbital flight

Views from different angles of the second successful launch of Vector’s B0.002 test vehicle. The full-scale prototype of the company's Vector-R launch vehicle completed a successful suborbital flight.

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9 August, 2017



DLR and Airbus Helicopters Germany carry out tests to reduce helicopter noise

In a current research project concerned with the scalability of active rotor control applications, the German Aerospace Center (DLR), in cooperation with Airbus Helicopters Germany, tested a contemporary five-bladed rotor system in a wind tunnel as part of the SKAT (Scalability and Risk Minimization of Technology) research project.

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2 August, 2017


 

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NASA tests the Webb Telescope’s communication skills

NASA called and the Webb telescope responded. NASA’s James Webb Space Telescope recently completed its Ground Segment Test Number 1 (GSEG-1), for the first time confirming successful end-to-end communication between the telescope and its mission operations center.

GSEG-1, which completed on June 20, tested all of the communications systems required to support the telescope’s launch, commissioning and normal operations once it is in orbit. The test showed successful end-to-end communication between the Webb telescope’s spacecraft bus, currently located at Northrop Grumman Aerospace Systems in Redondo Beach, California, and the telescope’s mission operations center at the Space Telescope Science Institute in Baltimore, Maryland. Before this test, the flight operations team had only verified communication with the telescope piecemeal — in several smaller tests that were not end-to-end.

During the test, the team sent the same command procedures to the telescope that will be sent during its nearly one-million-mile journey to its orbit at the second Lagrange point, known as L2. The team verified the configuration of the telescope’s onboard computers and also received telemetry from the telescope, including science data and health monitoring data.

The ground segment test consisted of two parts — the Space Network (SN) portion and the Deep Space Network (DSN) portion.

The eight‑hour‑long SN portion of the test, completed on May 24, tested all of the communications systems required during Webb’s launch phase. During this portion of the test, the team successfully exchanged commands and telemetry with the telescope using NASA’s Tracking and Data Relay Satellite (TDRS) network.

The 13‑hour‑long DSN portion of the test, completed on June 20, tested communications systems that will be used from the end of Webb’s launch phase through the end of the mission. During this portion of the test, the team successfully exchanged commands, telemetry and ranging data with the telescope, as well as offloaded information from the telescope’s data recorders.

The DSN comprises three ground stations, located about 120 longitudinal degrees apart from each other on Earth — one each in Canberra, Australia; Madrid, Spain; and Goldstone, California. The placement of these guarantees the Webb telescope will be able to contact at least one station at all times, to remain in constant communication with Earth. For this test, the telescope communicated with a specially designed trailer that mimics these ground stations, rather than the ground stations themselves.

Another communications test will take place at the telescope’s planned launch site in Kourou, French Guiana, about a month before launch in late 2018. This test will demonstrate the expected connectivity with the telescope at first contact with it, which will occur approximately three-and-a-half minutes after launch.

NASA’s James Webb Space Telescope is the world’s most advanced space observatory. This engineering marvel is designed to unravel some of the greatest mysteries of the universe, from discovering the first stars and galaxies that formed after the big bang to studying the atmospheres of planets around other stars. It is a joint project of NASA, ESA (the European Space Agency) and the Canadian Space Agency.

August 2, 2017

Written by Michael Jones


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