This paper presents a concept for the orbit determination and time synchronization (ODTS)
of a lunar radio navigation system. The proposed approach utilizes small ground antennas …

This paper shows the architecture of a Lunar Radio Navigation System (LRNS) constituted
by a small constellation of satellites supported from Earth by a dedicated network of small …

The development of a robust navigation infrastructure in cis-lunar space is crucial for the
coming new era of advanced lunar exploration. NASA has set a goal to develop an …

In the last years, the Moon has been put again on the top of the space exploration interests.
Both space ag en cie s and private companies are being involved in mission programs that …

To support the increasing interest in lunar exploration, the future lunar users will require
precise position, velocity, and timing (PVT) services on the Moon. Active efforts are being …

We describe our Lunar Navigation Satellite System (LNSS) that was designed to provide the
PNT service at the Lunar South Pole region. Our LNSS is composed of eight satellites …

The accuracy of the reference frames is one of the main aspects impacting the positioning
performance of a Satellite Radio Navigation System. Currently, different realisations of the …

This paper addresses the precise clock estimation problem on the lunar surface, especially
at the South Pole region. The problem is particularly challenging because the moon is about …

In the last years the interest towards the Moon exploration has increased, and one of the key
points towards the success of the future missions will be the lunar Gateway. The Gateway …

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 …