by Staff Writers
Greenbelt MD (SPX) Nov 19, 2014
A NASA "skunkworks" team gave itself just one year to develop, test and integrate a newfangled CubeSat that could reliably and easily accommodate agency-class science investigations and technology demonstrations at a lower cost.
The team, comprised of engineers and scientists at NASA's Goddard Space Flight Center in Greenbelt, Maryland, is on track to meet its self-imposed deadline.
Led jointly by Michael Johnson, the chief technologist of Goddard's Applied Engineering and Technology Directorate, and Michael Hesse, director of Goddard's Heliophysics Science Division, the team is expected to begin environmental testing of a six-unit, or 6U, CubeSat in late December.
Once the team completes thermal vacuum testing, it will deliver the new CubeSat to NASA's Kennedy Space Center, Florida, where it then will be readied for launch to the International Space Station for deployment perhaps as early as January 2016.
"Rapid advances in the performance and efficiency of miniaturized systems are enabling a future only limited by vision and imagination," Johnson said. "CubeSats are a part of that future."
The CubeSat - known as Dellingr, a name derived from the god of the dawn in Norse mythology - will carry three heliophysics-related payloads. It doubles the payload capability of the ubiquitous and proven three-unit, or 3U, CubeSat pioneered by the California Polytechnic Institute in 1999 primarily for the university community.
In February 2014, Johnson and Hesse pulled together a small team of Goddard engineers and scientists to develop and implement "lean," end-to-end techniques, processes and systems for a 6U CubeSat capable of carrying out formidable scientific missions.
As part of its charter, the Dellingr team was to design, test and deliver a flight-ready, fully integrated 6U CubeSat by February 2015, at a fraction of the cost of more traditional satellite missions.
The fully integrated Dellingr may be able to hitch a ride on a resupply craft headed for the International Space Station in January 2016, where it would be deployed in a high-inclination orbit similar to the station's orbital path. Its mission is expected to last up to six months.
Once successfully demonstrated, the team says it will make the platform's design - implemented with low-cost, commercial off-the-shelf parts - available to any U.S. organization interested in using it.
The Need for New and Improved CubeSat
In addition to their low cost, CubeSats enable mission configurations not possible with more traditional approaches. Instead of launching just one satellite, mission planners could deploy swarms or constellations of these tiny platforms to execute simultaneous, multi-point observations.
Technologists, meanwhile, also are interested in using CubeSats. Before mission planners can infuse a prototype technology, its developers must first demonstrate the technology in a relevant end-to-end space environment. CubeSats have the potential to offer the needed access at greatly reduced costs, Johnson said.
However, 3U CubeSats, while adequate, "don't always offer our scientists the payload volume they require for their missions," he added.
Disadvantages of the 3U size include more constraints on volume and power, said Chuck Clagett, Dellingr project manager. Furthermore, some studies suggest that previous CubeSats failed 40 percent of the time.
By doubling the platform's girth, increasing its power capacity, and employing novel processes to increase its on-orbit reliability, the team believes it will have created a platform capable of carrying out more robust missions for science.
"Our goal is to create a platform that is successful more than 90 percent of the time - similar, in fact, to sounding rocket flights," Clagett added.
ExoCube is launching in January 2015 as part of the CubeSat Launch Initiative on the ELaNa X mission. Two magnetometer systems will be demonstrated, as well. NASA's CubeSat Launch initiative provides opportunities for small satellite payloads to fly on rockets planned for upcoming launches or deployments from the International Space Station. It is open to NASA centers, U.S. not-for-profit organizations and accredited U.S. educational organizations.
"Dellingr is an innovative, fast-track mission that demonstrates our ability to execute reliable, small science-grade missions inexpensively and rapidly," said Luis Santos Soto, Dellingr deputy project manager and engineer at NASA's Wallops Flight Facility in Virginia who has spent the past five years working on CubeSats and developing mechanisms specifically for these tiny craft.
"For us, this is a pathfinder. It symbolizes the dawn of a new age for CubeSats at Goddard."
Microsat News and Nanosat News at SpaceMart.com
|The content herein, unless otherwise known to be public domain, are Copyright 1995-2014 - Space Media Network. All websites are published in Australia and are solely subject to Australian law and governed by Fair Use principals for news reporting and research purposes. AFP, UPI and IANS news wire stories are copyright Agence France-Presse, United Press International and Indo-Asia News Service. ESA news reports are copyright European Space Agency. All NASA sourced material is public domain. Additional copyrights may apply in whole or part to other bona fide parties. Advertising does not imply endorsement, agreement or approval of any opinions, statements or information provided by Space Media Network on any Web page published or hosted by Space Media Network. Privacy Statement All images and articles appearing on Space Media Network have been edited or digitally altered in some way. Any requests to remove copyright material will be acted upon in a timely and appropriate manner. Any attempt to extort money from Space Media Network will be ignored and reported to Australian Law Enforcement Agencies as a potential case of financial fraud involving the use of a telephonic carriage device or postal service.|