In the context of Deep Space Exploration as planned by the International Space Exploration
Coordination Group (ISECG), the Moon represents a significant step to feed forward what …

There is growing interest in designing a future lunar navigation satellite system (LNSS) while
utilizing a SmallSat platform. However, many design decisions, eg, regarding the satellite …

Autonomous vehicles make use of an Inertial Navigation System (INS) as part of vehicular
sensor fusion in many situations including GPS-denied environments such as dense urban …

There has been a growing interest in using small satellites (SmallSats) for a future lunar
navigation and communication satellite system (LNCSS). We conceptualize the design of a …

Ground-based assets traditionally aid space vehicle navigation, but the need for autonomy
is steadily growing to meet the demands of future deep-space exploration. This paper …

A robust yet affordable autonomous orbit determination system must be in place as the traffic
of spacecraft in cislunar space increases. The methods of autonomous orbit determination …

There is a growing interest in the use of legacy terrestrial Global Positioning System (GPS)
signals to determine the precise positioning and timing onboard a lunar satellite. Unlike prior …

The latest space missions have unveiled GNSS usability for distances greater than 187 000
km from the Earth's surface. The actual availability and usability of GNSS signals beyond …

After more than fifty years since the Apollo program, we are encountering a revived, second
Space Race with international space agencies seeking to not only return humans to the …

Observation and characterization of GNSS signals in space are gaining momentum for the
re-use of GNSS and its integration in Orbit Determination and Time Synchronization …