Lunar GNSS Receiver Experiment (LUGRE) to Deliver First GNSS Fix from the Moon in 2023 - Inside GNSS - Global Navigation Satellite Systems Engineering, Policy, and Design

Lunar GNSS Receiver Experiment (LUGRE) to Deliver First GNSS Fix from the Moon in 2023

The National Aeronautics and Space Administration in partnership with the Italian Space Agency will position the moon starting in 2023. The two agencies plan to land the Lunar GNSS Receiver Experiment (LuGRE) on the Moon’s Mare Crisium basin. There, LuGRE is expected to obtain the first GNSS fix on the lunar surface.

NASA awarded a contract to Firefly Aerospace to deliver a suite of 10 science investigations and technology demonstrations aboard a Blue Ghost lander to the Moon in 2023. The mission, destined for Mare Crisium, a low-lying basin on the Moon’s near side, will investigate a variety of lunar surface conditions and resources. LuGRE will receive signals from both GPS and Galileo. The data gathered will be used to develop operational lunar GNSS systems for future missions to the Moon. in preparation for human missions to the lunar surface.

LuGRE will fly on one of NASA’s Commercial Lunar Payload Services (CLPS) missions.

[Photo: Illustration of Firefly Aerospace’s Blue Ghost lander on the lunar surface. Credits: Firefly Aerospace.]

Screen Shot 2020-11-17 at 5.34.48 AMPositioning, navigation and timing on the lunar surface, using both Earth-orbiting GNSS and new envisioned lunar PNT systems, were the subject of a recent two-part series in Inside GNSS magazine: Across the Lunar Landscape – Exploration with GNSS Technology and Across the Lunar Landscape: Towards a Dedicated Lunar PNT System.

The Firefly Aerospace payloads, collectively expected to total 207 pounds (94 kg) in mass, include the Lunar GNSS Receiver Experiment (LuGRE), which is based on GPS. LuGRE will continue to extend the reach of GPS signals and, if successful, be the first to discern GPS signals at lunar distances. Other sensors:

  • The Regolith Adherence Characterization
  • The Next Generation Lunar Retroreflectors, which will serve as a target for lasers on Earth to precisely measure the distance between Earth and the Moon.
  • The Lunar Environment Heliospheric X-ray Imager
  • The Reconfigurable, Radiation Tolerant Computer System
  • The Lunar Magnetotelluric Sounder
  • The Lunar Instrumentation for Subsurface Thermal Exploration with Rapidity
  • The Lunar PlanetVac
  • Stereo Cameras for Lunar Plume Surface Studies
  • The Electrodynamic Dust Shield

The CLPS initiative is a key part of NASA’s Artemis lunar exploration efforts. The Artemis generation of lunar explorers will establish a sustained human presence on the Moon, prospecting for resources, making revolutionary discoveries, and proving technologies key to future deep space exploration. To support these ambitions, NASA navigation engineers from the Space Communications and Navigation (SCaN) program are developing a navigation architecture that will provide accurate and robust Position, Navigation, and Timing (PNT) services for the Artemis missions. GNSS signals will be one component of that architecture. GNSS use in high-Earth orbit and in lunar space will improve timing, enable precise and responsive maneuvers, reduce costs, and even allow for autonomous, onboard orbit and trajectory determination.

Located in the northeast quadrant of the lunar near side, Mare Crisium is a Nectarian-aged basin (about 3.9 billion years old) that spans 740 km (about 460 miles). LOLA data reveal that the floor of Mare Crisium is approximately 1.8 km (about 1.1 miles) below lunar datum, or “sea level,” while the outer rim is about 3.34 km (about 2.1 miles) above lunar datum. Lava flow features are prominent enough in this mare that they can be seen in the LOLA topographic data (see arrows in image for locations of some of these features). Two Soviet missions landed in Mare Crisium in the 1960s and ’70s. Luna 24 landed in Mare Crisium in 1976 and returned samples from the lunar surface to Earth. Luna 24’s predecessor, Luna 15, was less successful. It crash-landed in Mare Crisium in 1969. Mare Crisium is also the location of Luna City — a fictional city featured in the book “The Moon is a Harsh Mistress.” Courtesy NASA.