NASA delivered the NavCube3-mini payload\u00a0on\u00a0July 13\u00a0to Intuitive Machines for integration into\u00a0Altus-1,\u00a0the company\u2019s\u00a0first\u00a0lunar relay\u00a0satellite, marking an important milestone in the development of future\u00a0lunar\u00a0communications and navigation services.\u00a0The lunar relays are designed to enable communications\u00a0and navigation\u00a0for astronauts and rovers\u00a0operating\u00a0at the agency\u2019s future Moon Base.<\/p>\n
About\u00a0half\u00a0the size of a shoebox and weighing just 3.5 pounds, NavCube3-mini\u00a0is a\u00a0compact\u00a0but powerful navigation receiver designed to use signals from Earth-based\u00a0GPS and Galileo Global Navigation Satellite Systems (GNSS)\u00a0at lunar distances.\u00a0Operating on less than 20 watts of\u00a0power,\u00a0roughly the\u00a0same as a laptop computer, it can\u00a0determine\u00a0a spacecraft\u2019s precise position\u00a0far beyond Earth orbit.\u00a0The compact payload builds on a series of navigation technology advancements developed at\u00a0NASA\u2019s Goddard Space Flight Center\u00a0in Greenbelt, Maryland,\u00a0each\u00a0extending\u00a0GPS navigation\u00a0to new\u00a0record-breaking distances\u00a0from Earth.<\/p>\n
The payload will fly aboard Intuitive Machines\u2019\u00a0Altus-1\u00a0lunar relay\u00a0satellite,\u00a0the first of a planned network of lunar relay satellites being developed under the\u00a0company\u2019s Near Space Network Services contract\u00a0with NASA.\u00a0The relays\u00a0will provide communications and navigation support for missions\u00a0operating\u00a0at the Moon, including the challenging lunar\u00a0South\u00a0Pole\u00a0region,\u00a0where Artemis astronauts will land in 2028, and\u00a0where\u00a0direct\u00a0communications with\u00a0Earth can be difficult. By extending\u00a0communications\u00a0coverage and improving navigation services, the relay\u00a0network\u00a0will help\u00a0realize\u00a0NASA\u2019s vision for a sustained human presence on the lunar surface.<\/p>\n
Before being shipped to Intuitive Machines, NavCube3-mini underwent an extensive environmental and performance test campaign at NASA Goddard to verify it is ready for spaceflight. The environmental testing included vibration testing to simulate launch conditions, thermal vacuum testing in the extreme temperatures and vacuum of space, and electromagnetic compatibility testing to ensure the payload can\u00a0operate\u00a0reliably alongside other spacecraft systems\u00a0without causing or experiencing electromagnetic interference.\u00a0Performance testing was conducted before and after each environmental test using high-fidelity simulations of the GPS and Galileo signals the\u00a0NavCube\u00a0will\u00a0encounter\u00a0in lunar orbit, verifying functionality\u00a0and\u00a0performance throughout the\u00a0testing\u00a0campaign.\u00a0<\/p>\n
NavCube3-mini will serve as a key technology demonstration aboard\u00a0Altus-1,\u00a0validating\u00a0the use of GNSS-based navigation in the lunar region and providing valuable performance data to\u00a0support\u00a0the development of future lunar\u00a0navigation\u00a0infrastructure. This technology is part of NASA\u2019s broader strategy to develop communications and navigation services that\u00a0work across both\u00a0commercial providers and NASA\u2019s networks. These capabilities are\u00a0designed\u00a0to support a\u00a0growing\u00a0lunar ecosystem that includes orbiters, landers, rovers, and,\u00a0eventually,\u00a0astronauts living and working\u00a0on the\u00a0Moon.<\/p>\n
The delivery of NavCube3-mini\u00a0marks\u00a0another step toward building the communications and navigation\u00a0infrastructure\u00a0needed for long-term lunar exploration. Through partnerships with commercial providers\u00a0like Intuitive Machines, NASA is\u00a0building\u00a0a more connected and capable lunar environment. As activity around the Moon continues to grow, these capabilities\u00a0will\u00a0enable\u00a0lunar\u00a0spacecraft and explorers\u00a0to\u00a0operate\u00a0more safely, efficiently, and\u00a0autonomously.<\/p>\n
Katherine Schauer is a writer for the Space Communications and Navigation (SCaN) Program office and covers emerging technologies, commercialization efforts, exploration activities, and more.<\/p>\n