Sounding rocket tech could enable simultaneous, multi-point measurements
by Lori Keesey for GSFC News
Greenbelt MD (SPX) Oct 18, 2019
NASA engineers plan to test a new avionics technology - distributed payload communications - that would give scientists a never-before-offered capability in sounding rocket-based research.
With such technology, sounding rockets could deploy multiple soda can-sized sub-payloads to varying altitudes where their onboard miniaturized instruments could gather multi-point measurements. A distributed payload communications radio receiver located on the main payload would then gather the sub-payloads' data and multiplex them into one data stream that it would transmit to ground stations below.
This capability developed at NASA's Wallops Flight Facility in Virginia would simplify data gathering and payload tracking, and allow scientists to study multiple regions in space simultaneously, which they can't do with current sounding rocket technology.
"Currently, most sounding rockets gather data from only one point," said Cathy Hesh, the Wallops project manager spearheading the technology-development effort. "Our scientists want more."
"We took a diverse set of Wallops engineers to put this system together," Hesh said. "It's really an enabling technology, a technology that we've never been able to do before. It's really exciting."
Similar to AZURE
But the SubTEC demonstration will take the technology to the next level, Hesh said.
"The AZURE mission flew the same sub-payload form factor, but it carried only a tracer ampule. It did not have the telemetry avionics that we developed for these distributed payload communications," she said, adding that these technologies, including a radio receiver, a sub-payload antenna no larger than a quarter, miniaturized transmitters, and a highly efficient power-distribution system, were developed in part with Internal Research and Development program funding at NASA's Goddard Space Flight Center in Greenbelt, Maryland.
Within two minutes of the rocket's lift-off, Hesh said the launch doors will open. A rocket-based release mechanism will deploy two sub-payloads equipped with university-provided instruments. These sub-payloads will travel at about 200 miles per second to a position roughly 12 miles away from the main payload. During their flight, they will measure various physical phenomena in Earth's upper atmosphere.
A few seconds later, spring-loaded release mechanisms will deploy two additional sub-payloads, also equipped with instruments provided by another university researcher. Traveling at about 10 miles per hour to a position roughly two miles away from the main payload, these instruments will study thermal-ion plasma.
Once the sub-payloads eject, they will begin collecting and transmitting their data to the main payload receiver at a rate of about one megabits per second, Hesh said, adding the sub-payloads should get about four minutes of data before reentering the atmosphere. Following the sub-payloads' release, the receiver on the main payload will transmit the compiled data to a telemetry station below.
Under an FY19 IRAD, Wallops engineers Christian Amey and Brian Banks are developing a custom-made transmitter that would cost significantly less than the commercially available transmitters currently used on the distributed payload communications system. "Ultimately, we would like it to be possible to fly up to 16 to 20 of these sub-payloads in space at the same time," Hesh said. Reducing the cost of the transmitters would make this technology more economical.
"This is a top priority for NASA's Sounding Rocket Program," she continued, referring to the overall distributed payload communications system. "If implemented, it would be a game-changing technology to offer the sounding rocket science community."
For more Goddard technology news visit here
Analysis of Galileo's Jupiter entry probe reveals gaps in heat shield modeling
Washington DC (SPX) Oct 16, 2019
The entry probe of the Galileo mission to Jupiter entered the planet's atmosphere in 1995 in fiery fashion. As the probe descended from Mach 50 to Mach 1 and generated enough heat to cause plasma reactions on its surface, it relayed data about the burning of its heat shield that differed from the effects predicted in fluid dynamics models. New work examines what might have caused such a discrepancy. Researchers at the Universidade de Lisboa and the University of Illinois at Urbana-Champaign report ... read more
|The content herein, unless otherwise known to be public domain, are Copyright 1995-2024 - 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. All articles labeled "by Staff Writers" include reports supplied to Space Media Network by industry news wires, PR agencies, corporate press officers and the like. Such articles are individually curated and edited by Space Media Network staff on the basis of the report's information value to our industry and professional readership. 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. General Data Protection Regulation (GDPR) Statement Our advertisers use various cookies and the like to deliver the best ad banner available at one time. All network advertising suppliers have GDPR policies (Legitimate Interest) that conform with EU regulations for data collection. By using our websites you consent to cookie based advertising. If you do not agree with this then you must stop using the websites from May 25, 2018. Privacy Statement. Additional information can be found here at About Us.