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SmartSat Cooperative Research Centre (SmartSat) today commended Fleet Space Technologies’ successful demonstration of satellite-enabled Push-to-Talk (PTT) capabilities as part of the Defence Space Command-funded ASCEND2LEO project.
SmartSat and Safety from Space supported Fleet Space by adapting a variant of the ‘Beagle’ communications waveform, developed under previously SmartSat-funded projects, which Fleet Space implemented on the Centauri-4 satellite for this demonstration. This milestone in PTT capabilities opens a path to more secure, reliable, instantaneous communications across vast distances using highly advanced microsatellite architectures.
ASCEND2LEO’s successful demonstration for the Australian Defence Force Joint Capabilities Group showed that Fleet Space’s Centauri satellites can be re-programmed to deliver high-quality, fit-for-purpose voice capabilities while in orbit. Voice capabilities for Fleet Space’s Centauri satellite were enabled via a software update, establishing a proof of concept for the regenerative voice system architecture underlying the ASCEND2LEO program. In the end, this demonstration proved that highly flexible microsatellite constellations can quickly provide high-quality, purpose-built SATCOM capabilities at scale to meet complex needs in a wide range of situations.
ASCEND2LEO’s achievement was commended by Peter Kerr, SmartSat’s Defence and National Security Coordinator, who drove the concept for SmartSat’s involvement in the project by adapting and delivering the Beagle waveform.
“Enabling an entirely new voice capability for a satellite that is already in orbit is a tremendous technical accomplishment. With this proof of concept, SmartSat is playing a critical role in helping the Australian industry develop SATCOM resiliency for Australian defence and validate the Regenerative Voice System architecture, a powerful and ambitious approach undertaken by the ASCEND2LEO programme.”
During the live demonstration, hosted by the Defence Science & Technology Group (DSTG), Fleet Space’s PTT capabilities met strict performance criteria for one-way voice transmission, including voice quality, reliability, and link persistence across thousands of kilometres in manifold operational environments. With the successful demonstration of this technology, Fleet Space has shown the ability of its satellites to support critical missions and enable the development of a resilient space infrastructure for Australia and its allies around the world.
“Our demonstration of PTT for the ASCEND2LEO programme is the latest example of Fleet Space’s commitment to pushing the boundaries of innovation to meet the rapidly evolving and complex needs of the Australian Defence Force,” said Matt Pearson, Co-Founder and Chief Exploration Officer at Fleet Space. “By successfully delivering a software update to our Centauri satellite while in orbit, we are proud to be the developer and operator of the world’s smallest known voice-enabled satellite, creating new innovation pathways to advance new capabilities for the global space industry and beyond.”
The pivotal ‘Beagle’ waveform technology was first demonstrated in SmartSat’s Resilient Emergency and Search and Rescue Communications project to develop an enhanced emergency safety beacon using next-generation satellites, particularly in remote locations. SmartSat subsequently funded a second project, LunaSAR, focused on emergency communications for astronaut suit telemetry and lunar terrain vehicle telemetry, supporting NASA’s Artemis program. In this third phase, a variant of the Beagle waveform was delivered to Fleet Space for their ASCEND2LEO programme, following the signing of a AU$ 6.4 million contract with Defence Space Command to deliver tactical voice and data transmission where connectivity is limited.
The SmartSat-led ASCEND2LEO research partnership aims to advance the national space and defence industry by utilising Australia’s competitive strengths. SmartSat facilitated a collaborative effort between Fleet Space and research partners, the University of South Australia, who provided critical infrastructure for ground satellite communications; DSTG, who contributed significant expertise to testing and validating the on-orbit performance of the waveform; and Safety from Space, who contributed the updated waveform and helped with integration onto Fleet’s satellite payload.
This article was also published in Public Spectrum.
Justin Lavadia is a content producer and editor at Public Spectrum with a diverse writing background spanning various niches and formats. With a wealth of experience, he brings clarity and concise communication to digital content. His expertise lies in crafting engaging content and delivering impactful narratives that resonate with readers.
